Correlation between phosphorus segregation and stress corrosion cracking susceptibility in the heat affected zone of an A533B-A182 dissimilar weld joint


英字タイトル:
Correlation between phosphorus segregation and stress corrosion cracking susceptibility in the heat affected zone of an A533B-A182 dissimilar weld joint
著者:
Ziqing ZHAI Hiroshi ABE Yuichi MIYAHARA Yutaka WATANABE
発刊日:
公開日:
カテゴリ: 第11回
キーワードタグ:

概要

Effects of thermal history and segregation on the susceptibility of stress corrosion cracking (SCC) in the heat-affected zone (HAZ) of an alloy 182-A533B dissimilar weld joint in high temperature, oxygenated water doped with SO4 2- and Cl- was evaluated by creviced bent beam test. Results indicate that step cooling and the addition of Cl- promoted SCC propagation and reactivation in HAZ. It is also suggested that compositional changes induced by welding and step cooling, especially the segregation of phosphorus at grain/packet boundaries and precipitate-matrix interfaces, played an important role in promoting SCC reactivation/propagation in HAZ.


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