Effect of a brief post-weld heat treatment on the microstructure evolution and pitting corrosion of laser beam welded UNS S31803 duplex stainless steel
- Resource Type
- Article
- Authors
- Yang, Yanze; Wang, Zhiyu; Tan, Hua; Hong, Jufeng; Jiang, Yiming; Jiang, Laizhu; Li, Jin
- Source
- Corrosion Science. Dec2012, Vol. 65, p472-480. 9p.
- Subject
- *HEAT treatment of metals
*MICROSTRUCTURE
*PITTING corrosion
*LASER welding
*DUPLEX stainless steel
*TEMPERATURE effect
*WELDED joints
- Language
- ISSN
- 0010-938X
Abstract: The effect of laser-beam welding and subsequent short-time post-weld heat treatment at different temperatures and holding time on microstructure evolution and pitting corrosion behavior of UNS S31803 duplex stainless steel was investigated. The results showed the as-welded joint displayed impaired pitting corrosion resistance and that pitting preferentially occurred at ferrite grain in the fusion zone. Short-time heat treatment enhanced the pitting corrosion resistance of welded joint. Optimal post-weld heat treatment of 3min heat treatment at 1080°C was identified at which the joint restored the pitting corrosion resistance lost during welding process. [Copyright &y& Elsevier]