A Novel Preweld Laser Surface Treatment for Enhanced Intergranular Corrosion Resistance of Austenitic Stainless Steel Weldments
DSpace at IIT Bombay
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Title |
A Novel Preweld Laser Surface Treatment for Enhanced Intergranular Corrosion Resistance of Austenitic Stainless Steel Weldments
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Creator |
KAUL, R
PARVATHAVARTHINI, N GANESH, P MULKI, SV SAMAJDAR, I DAYAL, RK KUKREJA, LM |
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Subject |
grain-boundaries
sensitization reactivation behavior cracking 304l laser welding surface treatment stainless steel heat-affected zone sensitization intergranular corrosion grain boundary |
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Description |
This paper describes the development of a new prewelding laser surface melting treatment scheme to Suppress sensitization in the heat-affected zone of gas tungsten arc weldment of Type 304 stainless steel. The results of the present study, performed on 6-mm-thick medium-carbon (0.044 wt-%) and 10-mm-thick high-carbon (0.1 wt-%) Type 304 stainless steel sheets, established that surface modification engineered by CO(2) laser treatment is highly effective in suppressing heat-affected zone sensitization during subsequent gas tungsten arc welding. Laser surface treated heat-affected zone of gas tungsten are weldment exhibited a significantly lower degree of sensitization and susceptibility to intergranular corrosion than those of untreated heat-affected zone. This is attributed to higher fraction of Sigma 1 subgrain boundaries introduced by laser-assisted melting and resolidification.
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Publisher |
AMER WELDING SOC
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Date |
2011-07-17T09:24:21Z
2011-12-26T12:50:13Z 2011-12-27T05:36:22Z 2011-07-17T09:24:21Z 2011-12-26T12:50:13Z 2011-12-27T05:36:22Z 2009 |
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Type |
Article
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Identifier |
WELDING JOURNAL, 88(12), 233S-242S
0043-2296 http://dspace.library.iitb.ac.in/xmlui/handle/10054/4684 http://hdl.handle.net/10054/4684 |
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Language |
en
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