HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY AND Mg-H INTERACTION IN 7075 ALUMINUM ALLOY

J Chin Soc Corr Pro

2010, Vol. 30

Issue (5): 364-368 DOI:

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HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY AND Mg-H INTERACTION IN 7075 ALUMINUM ALLOY

ZHANG Yu, SONG Renguo, TANG Puhong

Key Laboratory of Mechanical Manufacture and Automation of Ministry of Education, Zhejiang University of Technology, Hangzhou 310014

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Abstract Grain boundary segregation, hydrogen embrittlement susceptibility and Mg-H interaction of 7075 aluminum alloys with double-peak aged were studied by means of cathodic H-permeation, hydrogen determinator, electronic tensile machine， energy dispersive X-ray spectrometer (EDS) and scanning electron microscopy (SEM). The results showed that both before and after hydrogen charging, the strength and etc. all had double peaks; the decline of second peak strength was smaller than the first peak, also it had excellent performance like high-strength and low- HE-susceptibility at the second peak; there may exist Mg-H interaction during the hydrogen charging process. Finally, the Mg-H interaction mechanism is discussed.

Key words: 7075 aluminum alloy grain boundary segregation hydrogen embrittlement Mg-H interaction

Received: 11 August 2009

ZTFLH:

TG178

Corresponding Authors: SONG Renguo E-mail: songrg@hotmail.com

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ZHANG Yu, SONG Renguo, TANG Puhong. HYDROGEN EMBRITTLEMENT SUSCEPTIBILITY AND Mg-H INTERACTION IN 7075 ALUMINUM ALLOY. J Chin Soc Corr Pro, 2010, 30(5): 364-368.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2010/V30/I5/364

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