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- Title
Hydrogen transport and environmental embrittlement effects in iron aluminides.
- Authors
Luu, W. C.; Wu, J. K.
- Abstract
Environmental embrittlement types of six iron aluminides have been systematically evaluated using electrochemical hydrogen permeation measurement, hydrogen microprint technique and tensile test in this study. The results of hydrogen permeation and microprint technique show that three α - disordered solid solution structure of binary and ternary iron aluminides (Fe-10Al, Fe-18Al, and Fe-18Al-5Cr) have higher effective diffusivity and permeation rate than B2 ordered structure of binary and ternary iron aluminides (Fe-28Al, Fe-28Al-5Cr, and Fe-40Al). The tensile test of six iron aluminides in air, vacuum treatment and hydrogen precharged were analyzed and concluded. Three α - disordered solid solution structure of iron aluminides suffer in hydrogen environment which are quite different embrittlement mechanisms from those B2 ordered structure of iron aluminides with serious tensile loss in air by moisture induced embrittlement.
- Subjects
METAL embrittlement; ELECTROCHEMICAL analysis; PERMEABILITY; ALUMINATES; SOLID solutions
- Publication
Journal of Materials Science, 2000, Vol 35, Issue 16, p4121
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1023/A:1004802824792