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|Title:||A Novel Preweld Laser Surface Treatment for Enhanced Intergranular Corrosion Resistance of Austenitic Stainless Steel Weldments|
|Publisher:||AMER WELDING SOC|
|Citation:||WELDING JOURNAL, 88(12), 233S-242S|
|Abstract:||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.|
|Appears in Collections:||Article|
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