Microstructural evolution of superaustenitic stainless steel weld metal subjected to post welding heat treatment

Jorge C.F. Jorge,Luís Felipe G. de Souza,Humberto N. Farneze, Cilene L.A. Silva,Matheus C. Mendes,João V.S. Matias,Leonardo S. Araújo,Sergio S.M. Tavares

Materials Letters（2023）

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摘要

•Microstructure of superaustenitic stainless steel weld metal after PWHT is studied.•As-welded austenitic microstructure has a low amount of Chi phase.•Sigma phase precipitates at the grain boundaries after PWHT.•Corrosion resistance is reduced regardless of the amount of sigma phase.

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关键词

Superaustenitic stainless steel, Weld metal, Microstructure, Sigma phase, Post welding heat treatment

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