Effect of Shielding Gas on the Microstructural Evolution in Laser Beam Welded AISI 410 Martensitic Stainless Steel |
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| Authors: | P Bala Srinivasan |
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| Affiliation: | 1. Department of Metallurgical and Materials Engineering, National institute of Technology, Tiruchirappalli, 620 015 Tamil Nadu, India;2. Institute of Materials Research, GKSS‐Forschungszentrum Geesthacht GmbH, 21502 Geesthacht, Germany |
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| Abstract: | Laser welding of AISI 410 martensitic stainless steel was attempted in a diffusion cooled RF excited CO2 slab laser under Gaussian mode with argon and nitrogen as shielding gas. The effect of shielding gas and energy density on the resultant weld bead geometry, microstructure and hardness were assessed and discussed. It has been observed that welds obtained under nitrogen shielding conditions had higher and uniform hardness across the weld metal on account of reduced ferrite content. |
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| Keywords: | Martensitic stainless steel Laser weld Microstructure Hardness Shielding gas |
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