Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 21, Issue 10, Pages 2173-2176Publisher
SPRINGER
DOI: 10.1007/s11665-012-0141-3
Keywords
duplex stainless steel; microstructure; pulsed laser welding; solidification
Categories
Ask authors/readers for more resources
The microstructure of the weld metal of a duplex stainless steel made with Nd:YAG pulsed laser is investigated at different travel speeds and pulse frequencies. In terms of the solidification pattern, the weld microstructure is shown to be composed of two distinct zones. The presence of two competing heat transfer channels to the relatively cooler base metal and the relatively hotter previous weld spot is proposed to develop two zones. At high overlapping factors, an array of continuous axial grains at the weld centerline is formed. At low overlapping factors, in the zone of higher cooling rate, a higher percentage of ferrite is transformed to austenite. This is shown to be because with extreme cooling rates involved in pulsed laser welding with low overlapping, the ferrite-to-austenite transformation can be limited only to the grain boundaries.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available