Intergranular environmentally assisted cracking of Alloy 182 weld metal in simulated normal water chemistry of boiling water reactor

被引：34

作者：

Peng, Qunjia ^{[1
]}

Shoji, Tetsuo ^{[1
]}

Yamauchi, Hiroyuki ^{[1
]}

Takeda, Yoichi ^{[1
]}

机构：

[1] Tohoku Univ, Fracture & Reliabil Res Inst, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

CORROSION SCIENCE | 2007年 / 49卷 / 06期

基金：

日本学术振兴会;

关键词：

superalloys; intergranular corrosion; repassivation;

D O I：

10.1016/j.corsci.2006.12.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Following characterization of grain boundaries in Alloy 182 weld metal, intergranular environmentally assisted cracking (IGEAC) growth behavior of the alloy in simulated normal water chemistry (NWC) of boiling water reactor (BWR) was tested by employing a crack growth rate test. The grain boundary was found consist of about 72% random boundaries, 21% low-angle boundaries and a few coincident boundaries. The correlation between the grain boundary characters and IGEAC was discussed. Based on the IGEAC growth rates obtained in the test and evaluations of the crack tip strain rate, the parameter of the slip-dissolution/oxidation model that embodies the kinetics of oxidation/repassivation in the crack-tip environment of Alloy 182 in BWR-NWC was quantitatively determined. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2767 / 2780

页数：14

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