SOME ASPECTS OF CRACK INITIATION IN MILD-STEEL UNDER CORROSION-FATIGUE CONDITION

被引：8
|
作者：
RAY, GP [1 ]
JARMAN, RA [1 ]
THOMAS, JGN [1 ]
机构：
[1] UNIV GREENWICH,SCH ENGN,LONDON SE18 6PF,ENGLAND
来源：
JOURNAL OF MATERIALS SCIENCE | 1994年 / 29卷 / 01期
关键词：
D O I：
10.1007/BF00356571
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The initiation of corrosion fatigue cracks has been studied for mild steel tested in 0.6 M sodium chloride solution. The results indicate that cyclic stress enhances the formation and coalescence of micropits at, and around, the inclusions, leading to the nucleation of cracks. Dissolution of the inclusions promotes local transport of hydrogen into the metal. Hydrogen plays a significant role in the initiation of voids and microcracks. Crack initiation also occurs with the formation of voids in and around slip bands, at grain boundaries and in the pearlitic regions.
引用
收藏
页码：47 / 53
页数：7
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