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X80钢热影响区原位充氢过程中的氢辅助裂纹扩展

Hydrogen-Assisted Crack Growth in the Heat-Affected Zone of X80 Steels during in Situ Hydrogen Charging.

作者信息

Qu Jinglong, Feng Min, An Teng, Bi Zhongnan, Du Jinhui, Yang Feng, Zheng Shuqi

机构信息

High Temperature Materials Research Institute, Central Iron & Steel Research Institute, Beijing100081, China.

Beijing GAONA Materials & Technology Co., LTD, Beijing 100081, China.

出版信息

Materials (Basel). 2019 Aug 12;12(16):2575. doi: 10.3390/ma12162575.

DOI:10.3390/ma12162575
PMID:31409025
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6720453/
Abstract

Herein, the hydrogen embrittlement of a heat-affected zone (HAZ) was examined using slow strain rate tension in situ hydrogen charging. The influence of hydrogen on the crack path of the HAZ sample surfaces was determined using electron back scatter diffraction analysis. The hydrogen embrittlement susceptibility of the base metal and the HAZ samples increased with increasing current density. The HAZ samples have lower resistance to hydrogen embrittlement than the base metal samples in the same current density. Brittle circumferential cracks located at the HAZ sample surfaces were perpendicular to the loading direction, and the crack propagation path indicated that five or more cracks may join together to form a longer crack. The fracture morphologies were found to be a mixture of intergranular and transgranular fractures. Hydrogen blisters were observed on the HAZ sample surfaces after conducting tensile tests at a current density of 40 mA/cm, leading to a fracture in the elastic deformation stage.

摘要

在此，采用慢应变速率拉伸原位充氢方法研究了热影响区（HAZ）的氢脆现象。利用电子背散射衍射分析确定了氢对热影响区样品表面裂纹路径的影响。随着电流密度的增加，母材和热影响区样品的氢脆敏感性增加。在相同电流密度下，热影响区样品比母材样品具有更低的抗氢脆能力。位于热影响区样品表面的脆性周向裂纹垂直于加载方向，裂纹扩展路径表明五条或更多裂纹可能连接在一起形成更长的裂纹。发现断裂形态为沿晶断裂和穿晶断裂的混合。在40 mA/cm的电流密度下进行拉伸试验后，在热影响区样品表面观察到氢泡，导致在弹性变形阶段发生断裂。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/8039285c5be5/materials-12-02575-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/59bd353ecb2d/materials-12-02575-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/28e3761fc876/materials-12-02575-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/d9f040530a87/materials-12-02575-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/ef27c4b40e6b/materials-12-02575-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/87da85ba7d17/materials-12-02575-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/97b14143d7bd/materials-12-02575-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/8039285c5be5/materials-12-02575-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/59bd353ecb2d/materials-12-02575-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/f462815d9e71/materials-12-02575-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/675a8b59418d/materials-12-02575-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/f209a4e584f8/materials-12-02575-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/28e3761fc876/materials-12-02575-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/d9f040530a87/materials-12-02575-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/ef27c4b40e6b/materials-12-02575-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/87da85ba7d17/materials-12-02575-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/97b14143d7bd/materials-12-02575-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7c37/6720453/8039285c5be5/materials-12-02575-g010.jpg

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