EFFECT OF HYDROGEN ON FATIGUE-CRACK GROWTH OF A FERRITIC-PEARLITIC LOW CARBON STEEL

被引：0

作者：

Nagao, Akihide ^{[1
,2
]}

Wang, Shuai ^{[3
]}

Nygren, Kelly E. ^{[2
,4
]}

Dadfarnia, Mohsen ^{[2
,5
]}

Sofronis, Petros ^{[2
,5
]}

Robertson, Ian M. ^{[2
,3
]}

机构：

[1] JFE Steel Corp, Kawasaki, Kanagawa, Japan

[2] I2CNER, Fukuoka, Japan

[3] Univ Wisconsin, Madison, WI USA

[4] Univ Illinois, Madison, WI USA

[5] Univ Illinois, Urbana, IL 61801 USA

来源：

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2017, VOL 6B | 2017年

基金：

美国国家科学基金会;

关键词：

EMBRITTLEMENT; DISLOCATIONS; DEFORMATION;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The effect of external high-pressure H-2 gas on fatigue-crack growth behavior has been examined using a ferritic-pearlitic low carbon steel. The presence of hydrogen accelerates the crack growth rate by approximate to 13 times compared to the uncharged state and shifts the fracture surface morphology from ductile striations to a mixture of "flat" and "quasi-cleavage" features. The common feature found in the microstructure immediately beneath the hydrogen-induced fracture surface is enhanced plasticity in terms of refined dislocation cell structures and dense dislocation bands.

引用

页数：6

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