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Influence of post-weld solution treatment on mechanical properties and microstructure of fusion zone of cobalt free maraging steel weldment

DSpace at IIT Bombay

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Title Influence of post-weld solution treatment on mechanical properties and microstructure of fusion zone of cobalt free maraging steel weldment
 
Creator KUMAR, DS
SINHA, PP
PRABHU, N
PRABHUGAUNKAR, GV
 
Subject toughness
post-weld solution treatment
gas tungsten arc welding
cobalt free maraging steel
gusion zone toughness
sustenite content
sctivation energy
 
Description Post-weld solution treatment (PWST) was carried out on gas tungsten arc weldments of a cobalt free maraging steel. A substantial increase in fusion zone toughness was observed after PWST. It was established that the increase in fusion zone toughness was due to a reduction in austenite content of the fusion zone. The volume fraction of austenite decreased with increasing solution treatment temperature. The PWST led to a decrease in severity of microsegregation, which in turn caused a reduction in austenite content of the fusion zone. The activation energy for the process of homogenisation of austenite was found to be 265 kJ mol(-1). The present work has clearly demonstrated that PWST before aging improves the fusion zone toughness in cobalt free maraging steel weldments.
 
Publisher MANEY PUBLISHING
 
Date 2011-08-18T05:08:01Z
2011-12-26T12:55:35Z
2011-12-27T05:41:21Z
2011-08-18T05:08:01Z
2011-12-26T12:55:35Z
2011-12-27T05:41:21Z
2005
 
Type Article
 
Identifier SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 10(2), 169-175
1362-1718
http://dx.doi.org/10.1179/174329305X36061
http://dspace.library.iitb.ac.in/xmlui/handle/10054/9900
http://hdl.handle.net/10054/9900
 
Language en