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Journals
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Raj, Baldev
- Ethics of Adopting Nuclear Power Technology in India
Abstract Views :242 |
PDF Views:88
Authors
Affiliations
1 German National Academy of Sciences, IN
1 German National Academy of Sciences, IN
Source
Asian Journal of Professional Ethics & Management, Vol 1, No 1 (2009), Pagination: 28-32Abstract
No AbstractFull Text
- Clinical Trial with Iron Carbohydrate Complex (Uniferon) in Iron Deficiency Anaemia Associated with Pulmonary Tuberculosis
Abstract Views :156 |
PDF Views:0
Authors
Baldev Raj
1,
M. S. Yadev
2
Affiliations
1 Department of Tuberculosis and Chest Diseases, IN
2 Department of Clinical Pathology, Medical College, Rohtak, IN
1 Department of Tuberculosis and Chest Diseases, IN
2 Department of Clinical Pathology, Medical College, Rohtak, IN
Source
The Indian Practitioner, Vol 24, No 2 (1971), Pagination: 129-133Abstract
Abstract not Given.Keywords
No Keywords given
- Impregnation of S-layer Protein Isolated from Extremophilic Bacillus licheniformis NARW 02 onto Titanium Phosphate Ceramic Enhances Uranium Removal from Aqueous Solution
Abstract Views :252 |
PDF Views:85
Authors
R. Selvakumar
1,
S. Aravindh
1,
J. Ravichandran
2,
U. Kamachi Mudali
3,
C. Anandbabu
4,
Baldev Raj
5
Affiliations
1 Nanobiotechnology Laboratory, Nanotech Research Facility, PSG Institute of Advanced Studies, Peelamedu, Coimbatore 641 004, IN
2 Department of Chemistry, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
3 Corrosion Science and Technology Group, Corrosion Science and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IN
4 Department of Biotechnology, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
5 PSG Institutions, Peelamedu, Coimbatore 641 004, IN
1 Nanobiotechnology Laboratory, Nanotech Research Facility, PSG Institute of Advanced Studies, Peelamedu, Coimbatore 641 004, IN
2 Department of Chemistry, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
3 Corrosion Science and Technology Group, Corrosion Science and Technology Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IN
4 Department of Biotechnology, PSG College of Technology, Peelamedu, Coimbatore 641 004, IN
5 PSG Institutions, Peelamedu, Coimbatore 641 004, IN
Source
Current Science, Vol 106, No 12 (2014), Pagination: 1719-1725Abstract
In the present study, bioceramic was prepared by impregnating surface layer protein (S-layer) isolated from extremophilic bacteria Bacillus licheniformis NARW 02 onto sol-gel-derived titanium phosphate (TiP) ceramic. The prepared bioceramic was used for adsorption of uranium ions from aqueous solution and compared with control lacking S-layer protein. The distribution coefficient value of TiP and bioceramic for uranium adsorption was 100.65 and 432.48 ml/g respectively. This study indicates that the bacterial S-layer can be potentially used to enhance the adsorption efficiency of the ceramics used in separation of uranium from waste water.Keywords
Bacillus licheniformis, Extremophilic Bacteria, Titanium Phosphate Ceramic, Uranium.Full Text
- Technology Development of Fast Reactor Fuel Reprocessing in India
Abstract Views :261 |
PDF Views:175
Authors
R. Natarajan
1,
Baldev Raj
2
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
2 National Institute of Advanced Studies Indian Institute of Science Campus, Bengaluru 560 012, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
2 National Institute of Advanced Studies Indian Institute of Science Campus, Bengaluru 560 012, IN
Source
Current Science, Vol 108, No 1 (2015), Pagination: 30-38Abstract
The long-term self-reliance to meet the ever-growing power demand in India can be achieved if the huge thorium reserve of the country can be exploited. To harness this, adequate quantity of the isotope uranium-233 has to be accumulated to sustain the thorium-uranium-233 cycle. To achieve this goal, plutonium-fuelled Fast Reactor Technology (FRT) is the best option as the thorium fuel can be converted to uranium-233 effectively using the system. But the success of the FRT programme can be realized only if the fuel cycle is closed and the fuel recovered through reprocessing is refabricated and recycled back to the reactor for power production. This article provides glimpses of the current status of this vital link, fast reactor fuel reprocessing, in India. It also provides an overview of the developments taken place in this field and briefly describes the current projects for future development.Keywords
Fast Reactor Technology, Indian Nuclear Power Programme, Mixed Carbide Fuels, PUREX Process.Full Text
- Thermal Imaging Method for Evaluation of Rheumatoid Arthritis in Small Animal Model–A Preliminary Study
Abstract Views :151 |
PDF Views:3
Authors
Affiliations
1 Department of Biomedical Engineering, SRM University, Kattankulathur, Tamilnadu, IN
2 Biomedical Engineering Department, SRM University, Kattankulathur, Tamilnadu, IN
3 Indra Gandhi Center for Atomic Research, Kalpakkam, Kalpakkam-603102, IN
1 Department of Biomedical Engineering, SRM University, Kattankulathur, Tamilnadu, IN
2 Biomedical Engineering Department, SRM University, Kattankulathur, Tamilnadu, IN
3 Indra Gandhi Center for Atomic Research, Kalpakkam, Kalpakkam-603102, IN
Source
Digital Image Processing, Vol 3, No 13 (2011), Pagination: 859-863Abstract
Thermal imaging method is a non invasive, non contact, accurate method for detecting the inflammation in arthritis compared to other diagnostic methods. Thermal imaging plays a crucial role in evaluation and monitoring the inflammation in rheumatoid arthritis .The aim of our study was to evaluate and monitor the inflammatory arthritis in rats by means of skin temperature measurement using thermal imaging technique. 0.2ml of mixture of freunds complete adjuvant mixed with a phosphate buffer saline at 1:1 are injected in right hind limb and forelimb and left limbs are kept for control. Thermal analysis of wistar rats showed that significant increase in mean temperature difference about 0.80c and 0.90c increase in temperature in inflamed right fore limb and hind limb than the left limb controls.Keywords
Rheumatoid Arthritis, Freunds Complete Adjuvant Skin Temperature Measurement, Thermal Imaging, Wistar Rat.- A Comparative Study of Edge Detection Technique on Radiographic Weld Image for Weld Defect Detection
Abstract Views :301 |
PDF Views:4
Authors
Affiliations
1 Sathyabama University, Chennai 119, IN
2 Quality Assurance Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
3 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
1 Sathyabama University, Chennai 119, IN
2 Quality Assurance Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
3 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
Source
Digital Image Processing, Vol 3, No 1 (2011), Pagination: 68-71Abstract
Radiography is one of the oldest Non Destructive Techniques used to find the volumetric defects in welding. After digitization, radiographic images are generally of low contrast, dark and have high noise. Hence it is difficult to detect the defects with very high accuracy. Hence, image enhancement is a significant part of automated radiography inspection system. Weld defect detection or classification is a multi-step process which plays a vital role in processing of the radiographic weld image. Edge Detection is one of the pre-processing step to eliminate the unwanted information from the radiographic image and used to extract the required defect information (edge of the Radiographic image) during further processing. This paper mainly deals with first derivative edge detection filters which are applied on the radiographic weld image. The optimum threshold value for the edge detection filters based on the type of defects is obtained. The major defects like weaving faults, crack, under cut and slag inclusion are analyzed.Keywords
Digital Radiography, Edge Detection, Morphological Processing, Weld Defects.- Human-Wildlife Conflict
Abstract Views :238 |
PDF Views:89
Authors
Pawan Kumar Agrawal
1,
Baldev Raj
2,
Sindhu Radhakrishna
2,
Abraham Verghese
3,
Kesavan Subaharan
3,
Ankita Gupta
3,
Abraham Verghese
4
Affiliations
1 National Agricultural Science Fund, Indian Council of Agricultural Research, New Delhi 110 012, IN
2 National Institute of Advanced Studies, Bengaluru 560 012, IN
3 National Bureau of Agricultural Insect Resources, Bengaluru 560 024, IN
4 GPS Institute of Agricultural Management, Bengaluru 560 058, IN
1 National Agricultural Science Fund, Indian Council of Agricultural Research, New Delhi 110 012, IN
2 National Institute of Advanced Studies, Bengaluru 560 012, IN
3 National Bureau of Agricultural Insect Resources, Bengaluru 560 024, IN
4 GPS Institute of Agricultural Management, Bengaluru 560 058, IN
Source
Current Science, Vol 111, No 10 (2016), Pagination: 1581-1582Abstract
Human-wildlife conflict (HWC) is on the rise globally, and is one of the significant environmental problems in India. In India, HWC manifests itself in several ways, such as wildlife poaching, retaliatory killing of/injury to wildlife species, crop raiding and livestock predation by wildlife species, injury to humans or human mortality, and destruction of property, houses and buildings by wildlife. Of these, wildlife conflict in agro pastoral contexts has been a subject of debate and great concern nationally, not only for its impact on the farmers, but also for the consequences regarding wildlife conflict. In India, HWC involves multiple stakeholders and multitudinous socio-cultural and environmental issues. Hence any study on this topic must encompass a multi-disciplinary effort that provides a holistic understanding of the history of wildlife, crop and livestock raiding, its nature and consequences and discuss various techniques that have been used or recommended to mitigate the effects of this crisis.Full Text
- Use of Liquid Metal Embrittlement for Development of a Weld Spliting Technique for Sectioning Austenitic Stainless Steel Plates
Abstract Views :232 |
PDF Views:5
Authors
Affiliations
1 PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
1 PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
Source
Indian Welding Journal, Vol 26, No 2 (1993), Pagination: 18-26Abstract
It is well known that fusion welding process cannot be used for welding austenitic stainless steel with copper and if by any chance, copper comes into contact with stainless steel during welding operation and stresses of sufficient magnitude are present in the material, it results in the cracking of stainless steel. The reason for this cracking is attributed to the phenomenon of Liquid Metal Embrittlement (LME) which refers to the degradation in mechanical properties of some metal/alloys when they are stressed in contact with certain liquid metal environments.- Conventional and Advanced Non-Destructive Test Techniques for Evaluation of Welds
Abstract Views :375 |
PDF Views:4
Authors
Affiliations
1 Division for PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
1 Division for PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
Source
Indian Welding Journal, Vol 23, No 2 (1991), Pagination: 64-75Abstract
Non-destructive Testing (NDT) is an integral and the most important constituent of the Quality Assurance (QA) programme of any industry. The objectives of the QA programmes are safety, reliability and economy. Non-destructive evaluation (NDE) places due emphasis on characterisation of material including quantitative determination of the size, shape and location of a defect or anomaly thus enabling evaluation of structural integrity of a component.- Residual Stress Evaluation In Austenitic Stainless Steel Butt Weld Joints By Ultrasonic Technique
Abstract Views :250 |
PDF Views:4
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam 603 102, IN
Source
Indian Welding Journal, Vol 25, No 3 (1992), Pagination: 130-136Abstract
This paper discusses the results of measurement of residual stress pattern across butt weld joints by ultrasonic velocity measurements in 15 mm and 47 mm thick AISI type 304 stainless steel plates. These are supplemented by results obtained from hole drilling strain gauge measurements. Pulse echo overlap technique was used to measure the through thickness longitudinal ultrasonic velocities. Acoustoelastic constant was determined to convert the change in ultrasonic velocities to residual stress values. The residual stress pattren obtained by the two techniques showed similar trends. Brief overview of various other residual stress measurement methods, and various techniques for ultrasonic velocity measurements are included in the paper.
Keywords
Residual Stress, Austenitic Stainless Steel, Weld Joint, Ultrasonic Velocity, Acoustoelastic Constant, Strain Guage Technique.- Research and Development Activities in Quality Assurance of Welded Components at Indira Gandhi Centre for Atomic Research, Kalpakkam, India
Abstract Views :203 |
PDF Views:4
Authors
Affiliations
1 Division for Post-Irradiation Examination and NDT Development, IN
1 Division for Post-Irradiation Examination and NDT Development, IN
Source
Indian Welding Journal, Vol 22, No 4 (1990), Pagination: 148-161Abstract
Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, India, is engaged in multidisciplinary R&D efforts in welding technology relevant to Fast Breeder Reactor Programme of the Country. R&D efforts initiated in the year 1974 have matured into groups with strong scientific and technological base in areas of design, processes and characterisation through complementary use of destructive and nondestructive test techniques.- Testing Measurement and Control of Welds-A View Point
Abstract Views :245 |
PDF Views:4
Authors
Affiliations
1 Indian Institute of Welding, IN
1 Indian Institute of Welding, IN
Source
Indian Welding Journal, Vol 19, No 4 (1987), Pagination: 259-261Abstract
Welding is an important means to fabricate structures and components from a wide spectrum of materials, of varied complexity and thickness ranges. Welds can be made with properties appropriate for service conditions. The requisite quality can be achieved based on adequate and appropriate testing, measurement and control of welds.- Reliability of Detection of Small Defects in Noisy Weldments by Advanced Signal Processing and Pattern Recognition Techniques
Abstract Views :264 |
PDF Views:4
Authors
Affiliations
1 Division for PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam 630 102, IN
1 Division for PIE & NDT Development, Indira Gandhi Centre for Atomic Research, Kalpakkam 630 102, IN
Source
Indian Welding Journal, Vol 20, No 2 (1988), Pagination: 340-343Abstract
Load bearing capacity of any structure for a given dimension can be increased by improving the reliability of detection of smaller defects in weldments. This is highly desirable in aeronautical and space industries where the overall weight of the structure is a major constraint as it decides the pay load capacity.
Maraging steels are widely used in space industries for fabrication of rocket motor casings. Conventional ultrasonic pulse echo technique is applied for defect detection in weldments. However, inspection by ultrasonic testing of top midsection of maraging steel weldments, which is acoustically noisy, poses problems for reliable detection of defects of size 3 mm long x 1 mm deep or less (a design requirement). This is because of small amplitude difference of echo signal (2dB) between the noise and defect signals. Reliability of detection of such defects is improved by adopting advanced signal processing and pattern recognition techniques, which in turn increases the load bearing capacity of the structures.
A developmental work was undertaken for reliable detection of small defects in maraging steel weldments. For this purpose, a fatigue crack of 3 mm x 1 mm size was created in top midsection of the maraging steel weldments representing expected weld defects formed during fabrication. This paper discusses the application of advanced techniques like, autocorrelation, cross power spectral analysis, demodulation and cluster analysis for detection of the simulated fatigue crack. By adopting these techniques 95% reliability has been achieved for the detection of the fatigue crack. The approach has been assessed for shop floor adaptability. The approach would yield considerable enhancement in the pay lead of space vehicle thus resulting in enhanced capability and effective utilization.
- Ultrasonic Inspection of Austenitic Stainless Steel Weldments—Our Experiences
Abstract Views :240 |
PDF Views:5
Authors
Affiliations
1 Radiometallurgy Laboratory, Reactor Research Centre, Kalpakkam—603 102, IN
1 Radiometallurgy Laboratory, Reactor Research Centre, Kalpakkam—603 102, IN
Source
Indian Welding Journal, Vol 15, No 3 (1983), Pagination: 91-95Abstract
Austenitic steel welded structures are widely used in power stations, petrochemical industries and nuclear industries. These welded structures pose unique problems for ultrasonic testing not experienced with ferritic steel welds. Since X radiography cannot be used in many cases (like inservice inspection, thick welds, planar defects, etc.), it becomes imperative that ultrasonic testing be used. To do this, the problems encountered during examination of austenitic steel weldments must be understood and solved.- Indian Science and Technology Enterprise Partnership
Abstract Views :264 |
PDF Views:82
Authors
Affiliations
1 National Institute for Science, Technology and Development Studies, New Delhi 110 012, IN
2 National Institute for Advanced Studies, Bengaluru 560 012, IN
1 National Institute for Science, Technology and Development Studies, New Delhi 110 012, IN
2 National Institute for Advanced Studies, Bengaluru 560 012, IN
Source
Current Science, Vol 113, No 10 (2017), Pagination: 1825-1826Abstract
Science and Technology (S&T) have emerged as major drivers of innovations and enterprise at present. Thus a systematic and focused effort to utilize S&T in enterprise holds the promise of revolutionizing the economic and industrial landscape of country. However, this potential of S&T-driven enterprise has not yet been realized in India, primarily because a complete ecosystem for such a Science and Technology Enterprise Partnership (STEP) has not yet been identified, let alone established. With the increasing role of S&T in all aspects of society and economical activities, there is an urgent need to develop a comprehensive framework and policy for S&T driven enterprises. It is clear that such an effort must identify all components, and integrate them in an effective framework for a successful STEP, beginning with a clear statement of vision and goal.Full Text
- Water Challenges In India:Seeking Solutions with an Integrated Approach
Abstract Views :268 |
PDF Views:70
Authors
Affiliations
1 National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
1 National Institute of Advanced Studies, Indian Institute of Science Campus, Bengaluru 560 012, IN
Source
Current Science, Vol 113, No 11 (2017), Pagination: 2074-2076Abstract
Rapidly expanding population and extensive urbanization have led to the demand for water growing swiftly from agriculture, energy, industry and domestic sectors. Other reasons such as, depletion of water sources, water pollution, inefficient usage, poor management of water supply systems and multiple institutional arrangements make the situation more complicated. System losses due to poor operation and maintenance, inaccurate metering, unbilled consumption, illegal tapping, etc. further add to unaccountable losses. Therefore, water resources need to be managed at numerous levels, with the involvement of numerous stakeholders and professionals from diverse disciplines.Full Text
References
- CGWB, Ground Water Yearbook 2013–14, 2014; http://www.cgwb.gov.in/documents/Ground%20Water%20Year%20Book%20-2013-14.pdf
- Planning Commission Five Year Plan, 2013; http://planningcommission.gov.in/plans/planrel/fiveyr/12th/pdf/12fyp_vol1.pdf
- Saha, G., Deshpande, S., Thorat, S., Mander, H. and Baviskar, A., Untouchability in Rural India, SAGE Publications, New Delhi, 2006.
- National Water Policy, GoI, Ministry of Water Resources, 2012.
- National Water Mission, State Specific Action Plan, Ministry of Water Resources, River Development and Ganga Rejuvenation, GoI; http://www.nationalwater-mission.gov.in/?q=node/76 (accessed on 13 March 2017).
- Non Linear Elastic Properties and Ultrasonic Attenuation in Ni-Al-Cr Alloy
Abstract Views :194 |
PDF Views:0
Authors
Affiliations
1 Physics Department, University of Allahabad, Allahabad-211002, IN
2 Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, IN
1 Physics Department, University of Allahabad, Allahabad-211002, IN
2 Indira Gandhi Centre for Atomic Research, Kalpakkam-603102, IN
Source
Journal of Pure and Applied Ultrasonics, Vol 33, No 3 (2011), Pagination: 54-58Abstract
The single crystal higher order elastic constants of Ni-Al-Cr ternary alloy at different temperatures have been calculated with the help of interaction potential model. Ultrasonic attenuation in the ternary alloy is determined using higher order elastic constants. Other ultrasonic parameters such as Gruneisen numbers, acoustic coupling constants and acoustical anisotropy have been also calculated to discuss the ultrasonic properties of the ternary alloys. The ultrasonic wave propagation behavior at different temperatures for Ni-Al-Cr alloy have been investigated and correlated with respect to the microstructural phenomena during the wave propagation and thermal behavior of the ternary alloy. An ultrasonic mechanism has been developed to correlate the temperature dependent ultrasonic properties with the thermophysical properties particularly the thermal conductivity of the alloy. The results are compared with earlier studies of the elastic constants and are found to be in good agreement. We find that the thermal conductivity of Ni-Al-Cr alloy plays important role in the ultrasonic wave propagation behavior inside the alloy.Keywords
Ternary Alloy, Elastic Constants, Ultrasonic Attenuation, Thermal Properties.Full Text
- Message
Abstract Views :220 |
PDF Views:198
Authors
Affiliations
1 Elect, International Institute of Welding
1 Elect, International Institute of Welding
Source
Indian Welding Journal, Vol 44, No 3 (2011), Pagination: 23-23Abstract
India is racing at high pace to be among the frontier economies of the world by 2020. The track record in the last ten years and a way forward from $1.4 trillion economy to $3 trillion by 2017 translates into rapid growth in energy, infrastructure and strategic sectors, in addition to enhance contributions by services, consumables, tourism and agriculture domains. Among the policies, science and technology, finance and demographic issues, materials manufacturing and the welding are crucial to achieve the spectacular growth with competitiveness and in robust (minimum risk and high performance) manners.
Full Text
- President's Message
Abstract Views :207 |
PDF Views:200
Authors
Source
Indian Welding Journal, Vol 35, No 3 (2002), Pagination: 5-5Abstract
My dear colleagues,
The Indian Institute of Welding has done extremely well in bringing academia, research and industry together in a friendly and productive environment to discus various facets of Welding Science and Technology. The welding professionals in India have met the challenges of atomic energy, space, defence, heavy industries and precision engineering in an admirable way to attract the attention of leading technocrats in India and abroad. However, there is no room for complacency, as in today’s world of global competitiveness, continued quality, reliability improvement, cost-effectiveness, timely deliveries, brand name, strategies, etc. are the key drivers for success. The Indian Institute of Welding needs the involvement of all welding professionals, who have the commitment to the Institute’s objectives to obtain success in these key drivers. Todays scenario of newer materials and advances in welding processes, have been continuously posing fresh challenges and opportunities to welding professionals. The firm and robust knowledge - base in Welding Science and Technology, available in abundance in our country, is an asset that has to be enhanced and leveraged for achieving our end objectives of being a leading nation in our chosen field of experties. Advances in materials science and engineering, robotics, intelligent welding, modeling, etc. need to be utilized judiciously to enable us to do welding with quality and in a cost-effective manner. To ensure this, education at all levels and continuing education of professionals in industry emerges as a major area of focus. Fortunately, India being an international leader in software provides us with the possibility of spreading the knowledge and information-base in Welding Science and Technology to a large number of students and professionals expeditiously and with the highest standards of quality. I am confident that we can achieve all these and bring laurels to our profession, our organisation and our country.
Full Text
- Intelligent Welding of Materials
Abstract Views :477 |
PDF Views:8
Authors
Baldev Raj
1,
A. K. Bhaduri
1
Affiliations
1 Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603102, Tamilnadu, IN
1 Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam - 603102, Tamilnadu, IN
Source
Indian Welding Journal, Vol 36, No 3 (2003), Pagination: 49-58Abstract
As welding technology improves, industry is incorporating more types of automatic welding equipment. One of the most important approaches being used is called intelligent automation for welding technology. This approach combines automatic welding equipment, the knowledge of human experts , and Artificial Intelligence (AI). An intelligent welding machine is the one equipped with sensors, artificial intelligence and actuators to sense and control welding operations in real time. Developing smart or intelligent welding machines can reduce the occurrence of defects in welds. Intelligent welder is differentiated from a mere mechanised or pre-programmed welder in that it controls the quality of the weld directly rather than simply maintaining the welding parameters within specified limits of the values based on experience and/or trial welds.- Laser Welding of Dissimilar Metals with Large Thickness Ratio
Abstract Views :231 |
PDF Views:5
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 The Welding Research Institute, BHEL, Tiruchirapalli, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 The Welding Research Institute, BHEL, Tiruchirapalli, IN
Source
Indian Welding Journal, Vol 29, No 2 (1996), Pagination: 17-23Abstract
Steam generators are critical components for the Prototype fast Breeder Reactor being designed at the Indira Gandhi Centre for Atomic Research, Kalpakkam. A leak in the steam generators can have serious consequences leading to rupture of steam generator tubes. Consequently, by introducing a known leak in the experimental loop, data is required to be generated which can predict the response of the material to the leak as a function of leak rate, time, temperature, steam pressure and the size of the microhole as a result of sodium water reaction.- Residual Stress Analysis in Weldments-Theoretical Approach
Abstract Views :198 |
PDF Views:5
Authors
Affiliations
1 Metallurgy and Materials Group Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 Department of Mechanical Engineering Indian Institute of Technology, Powai, Bombay, IN
1 Metallurgy and Materials Group Indira Gandhi Centre for Atomic Research, Kalpakkam, IN
2 Department of Mechanical Engineering Indian Institute of Technology, Powai, Bombay, IN
Source
Indian Welding Journal, Vol 29, No 4 (1996), Pagination: 7-23Abstract
Residual stresses are self equilibrating stresses existing in materials or components under uniform temperature conditions. When two pieces of plates/pipes are joined together by welding, localised residual stresses coupled with shrinkage are generated in the vicinity of the weld. The presence of these residual stresses can be detrimental to the strength of the joint. Tensile residual stresses are generally detrimental, increasing the susceptibility of a weld to fatigue damage, stress corrosion and fracture. During welding, temperature conditions range from melting point of the material to room temperature. Mechanical and thermal properties of the material are temperature dependent and this change with temperature during the welding process. The material stress-strain behaviour is elastic-plastic and temperature dependent. Thermal stresses are produced in the material during the process of heating and cooling. When the material is cooled to room temperature, the locked up stresses present in the material are retained residual tresses.- Importance of Thermophysical Properties of Materials in Thermal Modelling of Welds
Abstract Views :200 |
PDF Views:5
Authors
S. Murugan
1,
Baldev Raj
1
Affiliations
1 Metallurgy and Materials Group Indira Gandhi Centre for Atomic Research. Kalpakkam, IN
1 Metallurgy and Materials Group Indira Gandhi Centre for Atomic Research. Kalpakkam, IN
Source
Indian Welding Journal, Vol 29, No 4 (1996), Pagination: 24-32Abstract
During the process of welding, the intense heat source leads to rapid heating, melting of the material and vigorous circulation of the molten metal. The circulation in the molten metal is driven by the forces of buoyancy, surface tension and in addition, by electromagnetic forces (if electric current is utilised for welding). In fusion welding process, the temperature of molten weld pool ranges from near the boiling point on the top surface to liquidus- solidus transformation temperature at the edge of fusion boundary. The resulting heat transfer and the fluid flow determine the microstructure, size and shape of the weld region, the properties of weld metal and the base metal, and the residual stress distribution, The evolving microstructure and the residual stress distribution can significantly affect the strength and performance of the welded component. Experimental determination of the temperature distribution, microstructure and the residual stress distribution is not always feasible, and is expensive even if it is feasible. Theoretical models taking into account the various parameters involved in the welding processes are developed to predict the temperature distribution, evolution of microstructure and the residual stresses in the welded joint. Using validated computer models, allowable design loads and consequent inservice behaviour of the welded joint under different environmental conditions can be predicted.- Comprehensive Quality Management Through advanced Nondistinctive Testing Techniques for Reliable Performance of Welded Components
Abstract Views :233 |
PDF Views:5
Authors
Affiliations
1 Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
1 Indira Gandhi Centre for Atomic Research, Kalpakkam - 603 102, IN
Source
Indian Welding Journal, Vol 30, No 4 (1997), Pagination: 46-51Abstract
Welding Technology is an essential ingredient of the industrial world. It is impossible to imagine the industrial scenario without this technology. While it is necessary to use the already established welding technology in the conventional materials and components with more and more stringent control on quality and reliability, it is also necessary that conventional and newer welding technologies are used in newer materials and in newer component designs that are undertaken tor newer applications, and for improving the economy. A good welding technology and practice must ensure that, whatever may be the innovations introduced, there must not be any sacrifice on safety and reliability that are expected from the components. All the efforts made to design a good weld and to fabricate one may simply be wasted If It Is not ascertained and known beforehand that the joint is indeed fit for the purpose. Management of weld quality should be comprehensive, covering design, fabrication, use and discard.- Systematic Approaches Towards Sustainability in the 21st Century
Abstract Views :65 |
PDF Views:73
Authors
Affiliations
1 Former President, Indian National Academy of Engineering and former Director Indira Gandhi Reactor Center, Kalpakam, Ex-President, Indian Institute of Metals., IN
1 Former President, Indian National Academy of Engineering and former Director Indira Gandhi Reactor Center, Kalpakam, Ex-President, Indian Institute of Metals., IN
Source
Asian Journal of Professional Ethics & Management, Vol 14, No 3 (2022), Pagination: 7-11Abstract
This short essay is based on the experience and perspectives of the author, open literature and private communications, on a robust approach for integrating engineering technology and ecological engineering for sustainable development.Keywords
No keywords.Full Text
References
- Xu JP, Li ZM. A Review on Ecological Engineering based Engineering Management, Omega 2012, 40:368-378.
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