Hydrogen in iron aluminides

被引：32

作者：

Balasubramaniam, R ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mat & Met Engn, Kanpur 208016, Uttar Pradesh, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2002年 / 330卷

关键词：

iron aluminides; hydrogen embrittlement; decohesion; hydrogen diffusivity;

D O I：

10.1016/S0925-8388(01)01630-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ordered intermetallic alloys based on the stoichiometric iron aluminide compositions of Fe3Al and FeAl are being actively considered for high-temperature structural applications. They exhibit poor room temperature ductilities due to hydrogen embrittlement. Surface passive films reduce embrittlement by lowering the rate of hydrogen liberation on the surface. This has been explained by the mixed potential theory. The mechanism of hydrogen embrittlement in iron aluminides (namely, decohesion) has been addressed. Methods to minimize the degree of embrittlement have been discussed. These include passivity induction, addition of oxygen active elements, recrystallization inhibition and addition of irreversible hydrogen traps. The diffusion of hydrogen in iron aluminides has also been reviewed. (C) 2002 Elsevier Science BY All rights reserved.

引用

页码：506 / 510

页数：5

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