Rapid formation of the sigma phase in 304 stainless steel during friction stir welding

Rapid formation of sigma phase occurred in 304 stainless steel during friction stir welding. A possibility was suggested that the sigma formation can be accelerated by the emergence of delta-ferrite at high temperature and the subsequent decomposition of the ferrite under the high strain and recryst...

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Bibliographic Details
Published in:Scripta materialia 2003-12, Vol.49 (12), p.1175-1180
Main Authors: Park, Seung Hwan C., Sato, Yutaka S., Kokawa, Hiroyuki, Okamoto, Kazutaka, Hirano, Satoshi, Inagaki, Masahisa
Format: Article
Language:English
Subjects:
Applied sciences
Austenitic stainless steel
Constant-composition solid-solid phase transformations: polymorphic, massive, and order-disorder
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Friction stir welding
Joining, thermal cutting: metallurgical aspects
Materials science
Metals. Metallurgy
Microstructure
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Physics
Sigma phase
Welding
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Summary:Rapid formation of sigma phase occurred in 304 stainless steel during friction stir welding. A possibility was suggested that the sigma formation can be accelerated by the emergence of delta-ferrite at high temperature and the subsequent decomposition of the ferrite under the high strain and recrystallization induced by friction stirring.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2003.08.022