Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/xmlui/handle/10054/4684
Title: A Novel Preweld Laser Surface Treatment for Enhanced Intergranular Corrosion Resistance of Austenitic Stainless Steel Weldments
Authors: KAUL, R
PARVATHAVARTHINI, N
GANESH, P
MULKI, SV
SAMAJDAR, I
DAYAL, RK
KUKREJA, LM
Keywords: Grain-Boundaries
Sensitization
Reactivation
Behavior
Cracking
304l
Issue Date: 2009
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.
URI: http://dspace.library.iitb.ac.in/xmlui/handle/10054/4684
http://hdl.handle.net/10054/4684
ISSN: 0043-2296
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