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Hydrogen embrittlement of B-doped Ni3Al-based alloy

Published online by Cambridge University Press:  31 January 2011

Jian-Qing Su ,
Shu-Jun Gao  and
Zhuang-Qi Hu
Jian-Qing Su
Affiliation:
Liaoning Key Laboratory for Materials and Hydrogen, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
Shu-Jun Gao
Affiliation:
Liaoning Key Laboratory for Materials and Hydrogen, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
Zhuang-Qi Hu
Affiliation:
National Key Laboratory for RSA, Institute of Metal Research, Academia Sinica, Shenyang 110015, People's Republic of China
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Abstract

Environmental and internal-hydrogen embrittlements in stress-relieved and recrystallized Ni−16.5Al−8Cr−0.8Hf−0.1B−0.03Y (at. %) have been studied. The stress-relieved Ni3Al-based alloy showed environmental embrittlement when tested in air or in hydrogen gas. The embrittlement is more severe in hydrogen gas than that in air. The recrystallized Ni3Al-based alloy was not susceptible to air, but it was embrittled severely by hydrogen gas and exhibited not only a grain interior but a severer grain boundary embrittlement. When tested in air, the stress-relieved Ni3Al was insensitive to internal hydrogen; however, the recrystallized Ni3Al showed a certain susceptibility to internal hydrogen. With increasing the internal hydrogen content in the alloy, the ductility of the recrystallized Ni3Al decreased steadily and a certain degree of grain boundary embrittlement was observed.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 11 , November 1998 , pp. 3052 - 3059
Copyright
Copyright © Materials Research Society 1998

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