Crack growth behavior of pipeline steel in near-neutral pH soil environments

被引：73

作者：

Chen, Weixing ^{[1
]}

Sutherby, Robert L.

机构：

[1] Univ Alberta, Dept Chem & Mat Engn, Edmonton, AB T6G 2G6, Canada

[2] TransCanada PipeLines Ltd, Calgary, AB T2P 5H1, Canada

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2007年 / 38A卷 / 06期

关键词：

D O I：

10.1007/s11661-007-9184-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article reports the crack growth behavior of X-65 pipeline steel in near-neutral PH environments. Although it is often referred to as stress corrosion cracking (SCC), the crack growth behavior of pipeline steels in near-neutral PH environments has been found to be consistent with that of true corrosion fatigue, and the crack growth rate da/dN can be correlated with Delta(KKmax)-K-2/f(0.1). This correlation enables the determination of threshold Delta(KKmax)-K-2/f(0.1) values that demarcate the boundary between active growth and dormancy. Crack tip blunting was observed when a loading condition gave a Delta(KKmax)-K-2/f(0.1) value below the threshold. The threshold is found to be environmentally sensitive, and possibly also material dependent, but the details are yet to be determined.

引用

页码：1260 / 1268

页数：9

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