Effects of heat treatment and chromium content on the environmentally assisted cracking behavior of the dissimilar metal welds in simulated BWR coolant environments

被引：24

作者：

Huang, J. Y. ^{[1
]}

Yung, T. Y. ^{[1
,2
]}

Huang, J. S. ^{[1
]}

Kuo, R. C. ^{[1
]}

机构：

[1] INER, Tao Yuan 32546, Taiwan

[2] Natl Cent Univ, Dept Phys, Tao Yuan 320, Taiwan

来源：

CORROSION SCIENCE | 2013年 / 75卷

关键词：

Alloy; SEM; TEM; Corrosion fatigue; Stress corrosion; WELDMENTS;

D O I：

10.1016/j.corsci.2013.06.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The environmentally assisted cracking behavior of dissimilar metal (DM) welds, including Alloy 52 - A508 and Alloy 82 - A508, under simulated BWR coolant conditions was studied. Effects of postweld heat treatment (PWHT) on the SCC and corrosion fatigue crack growth rates of DM welds were evaluated. PWHT brought about a change of the carbide precipitate distribution and strain localization, thus leading to a redistribution of the weld residual stress. It is concluded that Cr content in the weld may not be the sole factor governing the SCC resistance; the localized strain concentration could also play an important role. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：386 / 399

页数：14

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