Numerical simulation and experimental investigation of laser dissimilar welding of carbon steel and austenitic stainless steel

M. R. Nekouie Esfahani; J. Coupland; S. Marimuthu

doi:10.1117/12.2176026

1 July 2015 Numerical simulation and experimental investigation of laser dissimilar welding of carbon steel and austenitic stainless steel

M. R. Nekouie Esfahani, J. Coupland, S. Marimuthu

Author Affiliations +

Proceedings Volume 9657, Industrial Laser Applications Symposium (ILAS 2015); 96570N (2015) https://doi.org/10.1117/12.2176026
Event: Industrial Laser Applications Symposium 2015, 2015, Kenilworth, United Kingdom

Abstract

This study reports an experimental and numerical investigation on controlling the microstructure and brittle phase formation during laser dissimilar welding of carbon steel to austenitic stainless steel. The significance of alloying composition and cooling rate were experimentally investigated. The investigation revealed that above a certain specific point energy the material within the melt pool is well mixed and the laser beam position can be used to control the mechanical properties of the joint. The heat-affected zone within the high-carbon steel has significantly higher hardness than the weld area, which severely undermines the weld quality. A sequentially coupled thermo-metallurgical model was developed to investigate various heat-treatment methodology and subsequently control the microstructure of the HAZ. Strategies to control the composition leading to dramatic changes in hardness, microstructure and service performance of the dissimilar laser welded fusion zone are discussed.

Citation Download Citation

M. R. Nekouie Esfahani, J. Coupland, and S. Marimuthu "Numerical simulation and experimental investigation of laser dissimilar welding of carbon steel and austenitic stainless steel", Proc. SPIE 9657, Industrial Laser Applications Symposium (ILAS 2015), 96570N (1 July 2015); https://doi.org/10.1117/12.2176026

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