QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
Print ISSN : 0288-4771
Optimization of Microstructure at Ni-C steel joint by friction stir welding with CO2 cooling
Takuya MIURARintaro UEJIHidetoshi FUJII
Author information
JOURNALS FREE ACCESS

2015 Volume 33 Issue 4 Pages 358-364

Details
Abstract

The effect of additional cooling by splaying liquid CO2 during friction stir welding (FSW) on the microstructure change in the stir zone of Fe - 24 wt.%Ni - 0.1 %C alloy steel was investigated. When the cooling rate after the stirring increased by the adoption of a faster welding speed and the use of CO2 cooling, a larger amount of retained austenite with lath martensite was present in the stir zone. The room temperature tensile test clarified that the retained austenite contributes to the high strength without loss of elongation due to the transformation induced plasticity (TRIP) effect.

Information related to the author
© 2015 by JAPAN WELDING SOCIETY
Previous article Next article
feedback
Top