Effects of External Hydrogen on Hydrogen Transportation and Distribution Around the Fatigue Crack Tip in Type 304 Stainless Steel

被引：6

作者：

Chen, Xingyang ^{[1
,3
]}

Zhou, Chengshuang ^{[1
,3
]}

Cai, Xiao ^{[1
,3
]}

Zheng, Jinyang ^{[2
,4
]}

Zhang, Lin ^{[1
,3
]}

机构：

[1] Zhejiang Univ Technol, Inst Mat Forming & Control Engn, Hangzhou 310014, Peoples R China

[2] Zhejiang Univ, Inst Chem Machinery Engn, Hangzhou 310027, Peoples R China

[3] Zhejiang Univ Technol, Inst Mat Forming & Control Engn, Hangzhou 310014, Zhejiang, Peoples R China

[4] Zhejiang Univ, Inst Chem Machinery Engn, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2017年 / 26卷 / 10期

基金：

中国国家自然科学基金;

关键词：

crack initiation; hydrogen distribution; hydrogen environment embrittlement; hydrogen microprint technique; strain-induced alpha ' martensite; AUSTENITIC STAINLESS-STEELS; MICROPRINT TECHNIQUE; GROWTH-PROPERTIES; PIPELINE STEELS; EMBRITTLEMENT; VISUALIZATION; PRESSURE; DIFFUSION; NI;

D O I：

10.1007/s11665-017-2968-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of external hydrogen on hydrogen transportation and distribution around the fatigue crack tip in type 304 stainless steel were investigated by using hydrogen microprint technique (HMT) and thermal desorption spectrometry. HMT results show that some silver particles induced by hydrogen release are located near the fatigue crack and more silver particles are concentrated around the crack tip, which indicates that hydrogen accumulates in the vicinity of the crack tip during the crack growth in hydrogen gas environment. Along with the crack propagation, strain-induced alpha' martensite forms around the crack tip and promotes hydrogen invasion into the matrix, which will cause the crack initiation and propagation at the austenite/alpha' martensite interface. In addition, the hydrogen content in the vicinity of the crack tip is higher than that at the crack edge far away from the crack tip, which is related to the stress state and strain-induced alpha' martensite.

引用

页码：4990 / 4996

页数：7

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