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Bupesh Raja, V. K.
- Experimental Investigation for Characterization of Formability of Epoxy based Fiber Metal Laminates using Erichsen Cupping Test Method
Abstract Views :194 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
2 Department of Automobile Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
3 Department of Mechanical Engineering, Vel Tech University, Chennai-600062, Tamil Nadu, IN
1 Department of Mechanical Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
2 Department of Automobile Engineering, Sathyabama University, Chennai-600119, Tamil Nadu, IN
3 Department of Mechanical Engineering, Vel Tech University, Chennai-600062, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 8, No 33 (2015), Pagination:Abstract
Fiber Metal Laminates are now-a-days a dominant material for applications such as automobile body panels, aircrafts cabins and railway wagons, because of reasons such as superior mechanical properties such as high strength and less weight. Hand Lay-up technique was used to fabricate four fiber metals laminates comprising of aluminium alloy 5052-H32 as the skin material and E-glass fiber as the core. The formability behavior of the laminate was found using Erichsen cupping test using an indigenously developed test setup. The Erichsen cupping index on the specimen varied from 5.95 to 7.28 respectively. The test specimens were investigated through microscope and macroscopic approach. Macroscopic examination revealed that the laminate was ductile in nature, which was backed by the aluminium skin. The defect created on the specimen during the test was smaller than the diameter of the ball used during the test. Microscopic examination through Scanning Electron Microscope revealed that the laminates had microscopic defects such as fiber pullout and surface cracks in the skin materials. The fibers were subjected to brittle failure while the skin material sustained ductile fractures. The Erichsen cupping index value depended upon the factors such as complexity of composite sheet forming operations, simple mechanical property measurements made from the tension test area of tested value. Ductile fracture was observed in the specimen due to the influence of progressive loading through Erichsen cupping test. There was non-uniform distribution of reinforcement in material, Microstructure revealed fiber cracks which were oriented in line to the crack growth on the skin material. Hence, it can be concluded that the proposed material can be safely applied for automotive, aeronautical and locomotive body panels or as a skin material.Keywords
Erichsen Cupping Index, Erichsen Cupping Test, Fiber Metal Laminate, Formability BehaviorFull Text
- Experimental Investigation of DSS/HRS GTAW Weldments
Abstract Views :135 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, IN
2 Department of Mechanical Engineering, Dr. MGR Educational and Research Institute University, Chennai - 600095, IN
3 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, IN
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, IN
2 Department of Mechanical Engineering, Dr. MGR Educational and Research Institute University, Chennai - 600095, IN
3 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, IN
Source
Indian Journal of Science and Technology, Vol 9, No 43 (2016), Pagination:Abstract
Objectives: The Gas Tungsten Arc Welding (GTAW) of blanks 2 mm thick of Duplex Stainless Steel (DSS) and Hot Rolled Medium and High Tensile Structural Steel (HRS) is carried out to investigate the metallurgical, mechanical properties and the fracture. Methods: The characterization of the weldments involves tests, viz. macrostructure, microstructure, micro composition analysis through Energy Dispersive Analysis of X ray (EDAX) to find out the metallurgical properties and micro hardness test, tensile test, bend test to determine the mechanical properties of the weldments. Topography of tensile test fractured specimens was analyzed with the help of Scanning Electron Microscope (SEM) and determines the influence of the welding on the ductility of the weld material. Findings: The increase in the weld zone micro hardness and formation of dendritic delta ferrite microstructure, when compared with the DSS parent metal having elongated grained austenite with ferrite and the HRS parent metal having fine grains of ferrite, caused the joint efficiency of the DSS/HRS weldment to increase. The Energy Dispersive Analysis of X ray (EDAX) indicates the formation of dendritic delta ferrite microstructure is attributed to the presence of elements like Si and Cr. The SEM fractography analysis indicates that the weldments possess good tensile strength without decrease in ductility of the fusion zone. Applications: Experimental investigation of mechanical properties and microstructure of DSS-HRS dissimilar GTAW weld joints and fracture analysis with EDAX to identify the changes in the chemical compositions of the fractured specimen.Keywords
Duplex Stainless Steel, GTAW, Hot Rolled Steel, Mechanical Properties, Microstructure.Full Text
- Mechanical Properties and Phase Transformations in Resistance Spot Welded Dissimilar Joints of AISI409M/AISI301 Steel
Abstract Views :176 |
PDF Views:0
Authors
Affiliations
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
1 Department of Mechanical Engineering, St Peters University, Avadi, Chennai - 600054, Tamil Nadu, IN
2 Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
3 Department of Mechanical Engineering, Dr MGR Educational and Research Institute University, Chennai - 600095, Tamil Nadu, IN
4 Department of Automobile Engineering, Sathyabama University, Chennai - 600119, Tamil Nadu, IN
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: This study aims to investigate the mechanical properties and phase transformations in dissimilar metal joints between AISI 301 Austenitic Stainless Steel and AISI 409M Ferritic Stainless Steel, joined by resistance spot welding. Methods/Analysis: Mechanical properties such as tensile shear strength, failure energy, failure mode, nugget size and surface indentation were analysed at varying current ratings. Macrostructure was examined for size and shape. Microstructure at various locations such as, fusion zone and heat affected zones were investigated. Micro hardness measurement was done at various locations along the weld. Findings: Peak load incremented progressively with rise in welding current, till the commencement of severe expulsion. Weld zone hardness showed a higher value than that of nearby heat affected zones and parent metals. Increment in welding current resulted in enlargement of weld nugget and rise in energy absorption capacity. Electrode indentation values were seen to be correlated with welding current values positively. Fusion zone microstructure consists of marten site and ferrite. Asymmetrical nugget shape was observed. Novelty/Improvement: This study explores the properties, both mechanical and microstructure of AISI 409M-AISI 301 steel dissimilar joint, joined by resistance spot welding.Keywords
AISI301, AISI409M, Failure mode, Microstructure, Peak load.Full Text
- Formability of Heat Treated AA19000, AA5052 and Simulation Using ABAQUS/CAE
Abstract Views :260 |
PDF Views:177
Authors
Affiliations
1 Dept. of Mech. Engg., Sathyabama University, Chennai, Tamil Nadu, IN
2 Dept. of Automobile Engg., Sathyabama University, Chennai, Tamil Nadu, IN
3 Dept. of Mech. Engg., Vel Tech University, Chennai, Tamil Nadu, IN
1 Dept. of Mech. Engg., Sathyabama University, Chennai, Tamil Nadu, IN
2 Dept. of Automobile Engg., Sathyabama University, Chennai, Tamil Nadu, IN
3 Dept. of Mech. Engg., Vel Tech University, Chennai, Tamil Nadu, IN
Source
International Journal of Vehicle Structures and Systems, Vol 9, No 4 (2017), Pagination: 233-237Abstract
In this paper the formability of heat treated AA19000 and AA5052 aluminium alloys was studied through experimentation and finite element simulation. The aluminium alloys of 1mm thickness as received and annealed condition were subjected to tensile test and Erichsen cupping test. The experimental results showed that AA5052 possessed better formability than AA19000, due to its magnesium content. The material properties obtained from the tests were validated through simulation using ABAQUS/CAE.Keywords
Tensile Test, Annealing, Formability, Erichsen Cupping Test, ABAQUS/CAE.Full Text
References
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- K. Logesh, V.K. Bupesh Raja and R.Velu. 2015. Experimental investigation for characterization of formability of epoxy based fiber metal laminates using Erichsen cupping test method, Indian J. Sci. and Tech., 8(33). https://doi.org/10.17485/ijst/2015/v8i33/72244.
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- K. Logesh and V.K.B. Raja. 2014. Investigation of mechanical properties of AA8011/PP/AA1100 sandwich materials, Int. J. Chem. Tech. Research, 6(3), 1749-1752.
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- K. Logesh, V.K.B. Raja. 2015. Formability analysis for enhancing forming parameters in AA8011/PP/AA1100 sandwich materials, Int. J. Adv. Manuf. Tech., 81(1-4).
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- Mechanical Characterization of Dissimilar Alloys Joined Using Electron Beam Welding:Technical Note
Abstract Views :322 |
PDF Views:137
Authors
Affiliations
1 Dept. of Automobile Engg., Sathyabama University, Chennai, Tamil Nadu, IN
2 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, Tamil Nadu, IN
3 Dept. of Mech. Engg., Veltech Dr. RR and Dr. SR University, Chennai, Tamil Nadu, IN
1 Dept. of Automobile Engg., Sathyabama University, Chennai, Tamil Nadu, IN
2 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, Tamil Nadu, IN
3 Dept. of Mech. Engg., Veltech Dr. RR and Dr. SR University, Chennai, Tamil Nadu, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 2 (2018), Pagination: 89-92Abstract
Electron Beam Welding (EBW) is used in various industrial applications for joining dissimilar metals due to its accuracy and good quality joints. International Thermonuclear Experimental Reactor (ITER) is the first experimental fusion power generating reactor in India. It uses a host of metals and alloys like Ti-6Al-4V, Ni-Al bronze and a special copper alloy (CRZ). This investigation aims to study the metallurgical and mechanical aspects of CRZ alloy and its EBW joint with a dissimilar metal like Nickel and stainless steel. Characterization includes material composition and effect of heat-treatment. The CRZ alloys were solution annealed at the temperature of 980°C for 15 minutes and then aged at 460-480°C for 4.5 hrs. The EBW welded joints were fabricated with CRZ-CRZ, CRZ-Ni and Ni-SS combination. The microstructure and mechanical properties were analyzed.Keywords
Mechanical Properties, Electron Beam Welding, Microstructure, Annealing, Copper Alloy.Full Text
References
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- Stretch Formability Behaviour of Glass Fibre Reinforced Nanoclay on Fiber Metal Laminated Composites
Abstract Views :264 |
PDF Views:112
Authors
Affiliations
1 Dept. of Mech. Engg., Sathyabama University, Chennai, IN
2 Dept. of Automobile Engg., Sathyabama University, Chennai, IN
3 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, IN
1 Dept. of Mech. Engg., Sathyabama University, Chennai, IN
2 Dept. of Automobile Engg., Sathyabama University, Chennai, IN
3 Dept. of Mech. Engg., Karpagam College of Engg., Coimbatore, IN
Source
International Journal of Vehicle Structures and Systems, Vol 10, No 2 (2018), Pagination: 115-121Abstract
Innovations and research in material processing have brought forward new and improvised materials that are applied in body panels of automobiles, aircraft cabins and railway wagons. These materials are used widely is because of their good mechanical properties and their high strength to weight ratio. In this paper Fibre Metal Laminates (FMLs) were added with organo modified montmorillonite (MMT) commonly known as nanoclay along with epoxy resin. The homogeneous dispersion of nanoclay in epoxy resin is accomplished by a hand stirrer dispersion method in ethanol. The FML material was processed by hand layup method. In this study the aluminium alloy 5052-H32 was used as a skin material and glass fibre (woven roving) used as core material which is bounded by epoxy with 5 wt.% nano clay (closet 30B). The fabricated sandwich material was cut by using water jet machine as per IS standards for testing. The fabricated material subjected to erichsen cupping test and was observed under Scanning Electron Microscope (SEM). The results from SEM image analysis indicated that the FML had fibre pull out and surface cracks were obtained in the skin material. Progressive loading resulted in ductile fracture which is absorbed in the specimen. Fibres came across brittle failure and the skin through ductile fracture. Non-uniform distribution of reinforcement is observed in the material, SEM micrographs revealed fibre cracks which were oriented in line to the direction of crack growth on the skin material. This study shows that these fibre metal laminates can be safely applied in automotive field.Keywords
Fibre Metal Laminates, Montmorillonite, Erichsen Cupping Test, Scanning Electron Microscope.Full Text
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