Effect of beam offset on the microstructure and mechanical properties of 201SS-Q235 self-fusion LBW joint

The 201SS and Q235 plates were joined using self-fusion LBW joint with different beam offset. The results showed that more 201SS in the FZ when the beam was shifted from Q235 side to 201SS side contributed to the more RA and δ-Fe phase. The twinned martensite was observed in the FZ containing 201SS...

Full description

Saved in:
Bibliographic Details
Published in:Journal of manufacturing processes 2019-11, Vol.47, p.297-309
Main Authors: Jiang, Xizhi, Du, Chengchao, Ni, Mansheng, Liu, Junjian
Format: Article
Language:English
Subjects:
Dissimilar joint
Laser beam welding
Martensitic transformation
Residual stress
Stainless steel
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The 201SS and Q235 plates were joined using self-fusion LBW joint with different beam offset. The results showed that more 201SS in the FZ when the beam was shifted from Q235 side to 201SS side contributed to the more RA and δ-Fe phase. The twinned martensite was observed in the FZ containing 201SS with a volume fraction of 60.5% (the FZ was called “FZ-3″). The tensile test of joint showed that the fracture occurred in the Q235 BM. The tensile test and impact test of sub-sized samples showed that more 201SS in the FZ declined the strength, plasticity, and toughness. The remarkable compressive stress was observed in WD as the volume increase from the MT of FZs during the cooling stage. The volume increase of FZ declined gradually as the increase of 201SS in it. The smallest volume increase of FZ-3 contributed to its lowest compressive stress in WD.
ISSN:1526-6125
2212-4616
DOI:10.1016/j.jmapro.2019.10.006