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Albert, Shaju K.
- Developing Empirical Relationship to Predict Hardness of the Laser Hardfaced Ni-Based Alloy Surfaces
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Authors
Affiliations
1 Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalainagar, Tamil Nadu, IN
2 Material Technology Division, Indira Gandhi Center for Atomic Research (IGCAR), Kalpakam, IN
1 Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalainagar, Tamil Nadu, IN
2 Material Technology Division, Indira Gandhi Center for Atomic Research (IGCAR), Kalpakam, IN
Source
Manufacturing Technology Today, Vol 16, No 1 (2017), Pagination: 9-17Abstract
Nuclear reactor components generally undergo wear damage due to severe operating conditions. The operating temperature of nuclear components generally falls in the range of 573-873 K. Among the reactor components, feed water regulator valves, used to throttle coolant flow, experiences higher wear rate. To enhance the wear resistance, nickel (Ni) and cobalt (Co) based alloys are hardfaced into austenitic stainless steels (ASS) through laser hardfacing technique. Laser hardfacing technique is an established surfacing process to deposit Ni base alloys with minimum dilution. Though lot of research works have been carried out so for to characterize laser hardfaced Ni base alloy surfaces, there is no direct correlation between laser parameters and hardness of the hardfaced surfaces. Hence in this investigation, an attempt has been made to develop empirical relationship to predict hardness of laser hardfaced Ni base alloy surface incorporating laser parameters using statistical tools such as design of experiments (DoE), analysis of variance (ANOVA). The developed empirical relationship can be effectively used to trail the hardness of laser hardfaced nickel alloy surfaces by altering laser parameters.Keywords
Austenitic Stainless Steel, Laser Hardfacing, Design of Experiment, Hardness.References
- Atamert, S; Bhadeshia, HKDH: Comparison of the Microstructures and Abrasive Wear Properties of Stellite Hardfacing Alloys Deposited by Arc Welding and Laser Cladding. 'Metallurgical Transactions A', vol. 20, no. 6, 1989, 1037–54.
- Frenk, A; Kurz, W: High Speed Laser Cladding: Solidification Conditions and Microstructure of a Cobalt-Based Alloy, 'Materials Science and Engineering A', vol. 173, no. 1-2, 1993, 339–342.
- Tiziani, A; Giordano, l; Matteazzi, P; Badan, B: Laser Stellite Coatings on Austenitic Stainless Steels, 'Materials Science and Engineering', vol. 88, 1987, 171–175.
- Arif, AFM; Yilbas, BS: Laser Treatment of HVOF Coating: Modeling and Measurement of Residual Stress in Coating, 'Journal of Materials Engineering and Performance', vol. 17, no. 5, 2008, 644–650.
- Liu, Z; Cabrero, J; Niang, S and Al-Taha, ZY: Improving Corrosion and Wear Performance of HVOF-Sprayed Inconel 625 and WC-Inconel 625 Coatings by High Power Diode Laser Treatments, 'Surface and Coatings Technology', vol. 201, no. 16-17, 2007, 7149–58.
- Navas, C; Vijande, R; Cuetos, JM; Fernández, MR; J de Damborenea: Corrosion Behaviour of NiCrBSi Plasma-Sprayed Coatings Partially Melted with Laser, 'Surface and Coatings Technology', vol. 201, no. 3-4, 2006, 776–785.
- Schmidt, RD; Ferriss, DP: New Materials Resistant to Wear and Corrosion to 1000±C, 'Wear', vol. 32, no. 3, 1975, 279–289.
- Davis, Joseph R: ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys, 'ASM International', Materials Park, 2000.
- Halstead, A; Rawlings, RD: Structure and Hardness of Co-Mo-Cr Si Wear Resistant Alloys (Tribaloys), 'Metal Science', vol. 18, no. 10, 1984, 491–500.
- Mason, SE; Rawlings, RD: Structure and hardness of Ni–Mo–Cr–Si wear and corrosion resistant alloys, 'Materials Science and Technology', vol. 5, no.2, 1989, 180-185
- Sauthoff, Gerhard, Intermetallics, 1995.
- Liu, CT; Zhu, JH; Brady, MP; McKamey, CG; Pike, LM: Physical Metallurgy and Mechanical Properties of Transition - Metal Laves Phase Alloys, vol. 8, no. 9-11, 2000, 1119–1129.
- Navas, C; Cadenas, M; Cuetos, JM; J. de Damborenea: Microstructure and Sliding Wear Behaviour of Tribaloy T-800 Coatings Deposited by Laser Cladding, 'Wear', vol. 260, no. 7-8, 2006, 838–846.
- Przybylowicz, J; Kusinski, J: Laser Cladding and Erosive Wear of Co – Mo – Cr – Si Coatings, 'Surface & Coatings Technology', vol. 125, no. 1-3, 2000, 13–18.
- Lin, WC; Chen, C: Characteristics of Thin Surface Layers of Cobalt-Based Alloys Deposited by Laser Cladding, 'Surface and Coatings Technology', vol. 200, no. 14-15, 2006, 4557–4563.
- Price, M; Wolfl, TA: The Microstructures and Mechanical Properties of a Series of Plasma and Detonation Coatings of Cobalt and Nickel Alloys with Molybdenum, Two of the Coatings Were St’, vol. 45, 1977, 309–19.
- Bolelli, G; Lusvarghi, L: Heat Treatment Effects on the Tribological Performance of HVOF Sprayed Co-Mo-Cr-Si Coatings, 'Journal of Thermal Spray Technology', vol. 15, no. 4, 2006, 802–810.
- Zhang, H; Shi, Y; Kutsuna, M; Xu, GJ: Laser cladding of Colmonoy 6 powder on AISI316L austenitic stainless steel, 'Nuclear Engineering and Design', vol. 240, no. 10, 2010, 2691-2696.
- Siva, K; Murugan, N; Logesh, R: Optimization of weld bead geometry in plasma transferred arc hardfaced austenitic stainless steel plates using genetic algorithm, 'Int J Adv Manuf Technology', vol. 41, no. 1, 2009, 24-30.
- Kesavan, D; Kamaraj, M: The microstructure and high temperature wear performance of a nickel base hardfaced coating, ‘Surface & Coatings Technology’, vol. 204, no. 24, 2010, 4034-4043
- Notch Tensile Properties of Various Regions of Dissimilar Joints of Austenitic and Ferritic Steels
Abstract Views :186 |
PDF Views:5
Authors
Affiliations
1 Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, IN
2 Materials Mechanics Section, Materials Technology Division,Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, IN
1 Centre for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, IN
2 Materials Mechanics Section, Materials Technology Division,Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam, IN
Source
Manufacturing Technology Today, Vol 16, No 6 (2017), Pagination: 12-22Abstract
In sodium cooled fast breeder reactor at Kalpakkam, the steam generators are constructed using modified 9Cr-1Mo (also called as Grade 91 or P91) ferritic steel because of its high temperature strength and resistance to stress corrosion cracking. The interconnecting sodium piping between reactor and steam generator is made up of AISI 316LN because of its high creep strength and corrosion resistance. Nickel based fillers (Inconel 82/182) are commonly used to weld the 316LN piping with steam generator. For a better structural integrity assessment of this dissimilar joint, the tensile properties of each region need to be evaluated. Evaluating the tensile properties of various regions by smooth tensile specimens is quite complex and time consuming. In the present investigation, the notch tensile properties of various regions were evaluated by placing a notch at the desired locations of the dissimilar metal weld joint (DMWJ). The dissimilar joint between P91 and 316LN is fabricated by manual metal arc welding (MMAW) process using Inconel 182 electrodes. Notch tensile properties of each region were evaluated by placing a notch at different locations (viz. weld metal, buttering, HAZ of P91 and HAZ of 316LN). Microhardness variation across the DMWJ was recorded. Microstructural features of various regions were characterized by optical and scanning electron microscope. From this investigation, it is found that the notch placed in the HAZ of P91 exhibited highest notch tensile strength than other regions. A non-uniform hardness distribution is observed across the DMWJ and the maximum hardness is recorded at the interface between P91 HAZ to Inconel 182 buttering. The hardness is minimum at the outer edge of HAZ of P91 side. Evolution of carbon enriched hard zone at the interface between P91 and Inconel 182 buttering could be the reason for highest notch tensile strength.Keywords
Dissimilar Metal Weld Joint, Notch Tensile Test, Microhardness, Microstructure.References
- Kumar, P; Pai, A: An overview of welding aspects and challenges during manufacture of Intermediate Heat Exchangers for 500MWe Prototype Fast Breeder Reactor, 'Procedia Eng.', vol. 86, 2014, 173-183.
- Sarikka, Teemu; Ahonen, Matias; Mouginot, Nevasmaa, Roman; arjalainen-Roikonen, Päivi K; Ehrnstén, Ulla; Hänninen, Hannu:Microstructural, mechanical, and fracture mechanical characterization of SA 508-Alloy 182 dissimilar metal weld in view of mismatch state, 'International Journal of Pressure Vessels and Piping', vol. 145, 2016, 13-22.
- Jang, C; Lee, J; Sung Kim, J; Eun Jin, T: Mechanical Property Variation Within Inconel 82/182 Dissimilar Metal Weld Between Low Alloy Steel and 316 Stainless Steel, 'Int. J. Pressure Vessels Piping', vol. 85, no. 9, 2008, 635-646.
- Kim, JW; Lee, K; Kim, JS; Byun, TS: Local Mechanical Properties of Alloy 82/182 Dissimilar Weld Joint Between SA508 Gr.1a and F316 SS at RT and 320°C, 'J. Nucl. Mater.', vol. 384, no. 3, 2009, 212–221.
- Pandey, S; Prasad, R; Singh, PK; Rathod, DW: Investigation on Dissimilar Metal Welds of SA312 Type 304LN Pipe (Extruded) and SA508Gr.3Cl.1 Pipe (Forged), Bhabha Atomic Research Centre, Mumbai, India, Report No. 2008/36/107-BRNS/4038A, 2014.
- Zhang, ZL; Hauge, M; Thaulowa, C; Ødegård, J: A notched cross weld tensile testing method for determining true stress–strain curves for weldments, 'Engineering Fracture Mechanics', vol. 69, no. 3, 2000, 353-366.
- Wendell B. Jones C. R. HillsD. H. Polonis,; Microstructural evolution of modified 9Cr-1Mo steel, 'Metallurgical Transactions A', vol. 22, no. 5, 1991, 1049-1058.
- Wang, HT; Wang, GZ; Xuan, FZ; Liu, CJ; Tu, ST: Local mechanical properties of a dissimilar metal welded joint in nuclear powersystems”, Materials Science and Engineering: A, vol. 568, 2013, 108-117.
- Rathod, Dinesh W; Sunil Pandey, Singh, PK; Rajesh Prasad: Mechanical Properties Variations and Comparative Analysis of Dissimilar Metal Pipe Welds in Pressure Vessel System of Nuclear Plants, 'ASME J. Pressure Vessel Technol.', vol. 138, no. 1, 2015, 1-9.