Observation and quantification of the diffusion-induced grain boundary migration ahead of SCC crack tips

被引：17
|
作者：
Shen, Zhao [1 ]
Karamched, Phani [1 ]
Arioka, Koji [2 ]
Lozano-Perez, Sergio [1 ]
机构：
[1] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England
[2] Inst Nucl Safety Syst Inc INSS, 64 Sata,Mihama Cho, Fuki, Mihama 9191205, Japan
来源：
CORROSION SCIENCE | 2019年 / 147卷
基金：
英国工程与自然科学研究理事会;
关键词：
Nickel alloy; Crack tip; Diffusion-induced grain boundary migration; Oxidation; Transmission electron microscopy; STRESS-CORROSION CRACKING; PREFERENTIAL INTERGRANULAR OXIDATION; TRANSMISSION ELECTRON-MICROSCOPY; STAINLESS-STEELS; WATER; SUSCEPTIBILITY;
D O I：
10.1016/j.corsci.2018.11.019
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Crack tips prepared from Ni-based alloys after stress corrosion cracking testing in simulated pressurized water reactor primary water have been studied by high-resolution characterization. Diffusion-induced grain boundary migration (DIGM) was observed in all the cracks and its potential role on the crack propagation is discussed in detail. The extent of DIGM observed changed with grain boundary type and alloy composition, which could lead to different extent of retardation effects on the crack propagation. A method is proposed to quantify the role of DIGM on crack propagation based on the results obtained in this work.
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页码：163 / 168
页数：6
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