Hydrogen embrittlement properties of 7075 and 6061 aluminum alloys in humid air

被引：23

作者：

Osaki, Shuhei ^{[1
]}

Ikeda, Jun ^{[2
]}

Kinoshita, Katsuyuki ^{[1
]}

Sasaki, Yuzo ^{[3
]}

机构：

[1] Graduate School of Science and Engineerig, Yamaguchi University, Ube-shi, Yamaguchi 755-8611

[2] Yamaguchi University, Ube-shi, Yamaguchi

[3] Japan Aluminum Association, Chuo-ku, Tokyo

来源：

Keikinzoku/Journal of Japan Institute of Light Metals | 2006年 / 56卷 / 12期

关键词：

6061 7075 SSRT test; Humid air; Hydrogen embrittlement;

D O I：

10.2464/jilm.56.721

中图分类号：

学科分类号：

摘要：

For 6061-T6 and 7075-T6 aluminum alloys as candidate liner materials for high-pressure hydrogen container, SSRT (slow strain-rate technique) tests in humid air with 90% relative humidity were carried out to evaluate the susceptibility to hydrogen embrittlement (HE) and to reveal the process of HEAC (hydrogen-environment -assisted cracking). 7075-T6 showed a significant susceptibility to HE, resulting in intergranular cracking, while in contrast, 6061-T6 exhibited an excellent resistance required as liner materials. HEAC of 7075-T6 is confirmed to progress as follows; at the first stage micro-cracks originate at inclusions of Al-Fe-(Cu) phase on the specimen surface and then advance to intergranular cracking. 6061-T6 would not give rise to micro-cracks because of less localization of slip deformation enhanced by hydrogen effects, mainly due to the precipitation microstructure.

引用

页码：721 / 727

页数：6

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