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Numerical Analysis of Gas Tungsten Arc Welded AISI 316LN Austenitic Stainless Steel Joints using Response Surface Methodology and Finite Element Anlysis


Numerical Analysis of Gas Tungsten Arc Welded AISI 316LN Austenitic Stainless Steel Joints using Response Surface Methodology and Finite Element Anlysis
Authors : C. R. Ashwin Kumar, Dr. S. Sathiyamurthy
Publication Date: 13-06-2016

Authors

Author(s):  C. R. Ashwin Kumar, Dr. S. Sathiyamurthy

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 5 - Issue. 06 , June - 2016

e-ISSN:   2278-0181

 DOI:  http://dx.doi.org/10.17577/IJERTV5IS060210

Abstract

316LN stainless steel is majorly used in the Fast Breeder Reactors (FBR) because of its better corrosion resistance and high strength. Gas Tungsten Arc Welding (GTAW) is a potential candidate to fabricate quality weld joints. However, the process parameters should select in such a way the joints have enough penetration and smaller weld width. So it is necessary to understand the effect of process parameters on the weld penetration and width. Hence in this investigation the process parameters namely current, welding speed and gas and flow rate on weld bead geometry was studied. The response surface methodology is employed to develop the empirical relationship to predicted the penetration and weld width. Using the FE numerical data generated on the influence of process variables on weld-bead geometry, regression models correlating the weld-bead shape parameters with the process parameters were developed for determining the objective function in response surface methodology (RSM). Experimental validation was carried out to verify the optimized weld joint. Close agreement was achieved between the experimental weld-bead profile and the optimized weld-bead profile.

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