Mechanics and thermodynamics on the stress and hydrogen interaction in crack tip stress corrosion: Experiment and theory

被引：72

作者：

Mao, SX ^{[1
]}

Li, M ^{[1
]}

机构：

[1] Univ Calgary, Dept Mech Engn, Calgary, AB T2N 1N4, Canada

来源：

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS | 1998年 / 46卷 / 06期

关键词：

chemo-mechanical fracture; crack mechanics; elastic-plastic material; finite elements;

D O I：

10.1016/S0022-5096(97)00054-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hydrogen distribution around a crack tip subject to stress corrosion for pipeline steels was measured by secondary ion mass spectrometry (SIMS) and modelled by finite element analysis. The results show that hydrogen will be generated and accumulated around the SCC crack tip. From thermodynamics analysis, it has been found that the interaction between the stress and hydrogen at the crack tip will increase the activation energy for anodic dissolution. Hydrogen plays an important role in the process of SCC for pipeline steels by promoting stress corrosion cracking of anodic dissolution type. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1125 / 1137

页数：13

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