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Hydrogen Embrittlement of Ni3Al at Various Hydrogen Contents and Strain Rates

Published online by Cambridge University Press:  01 January 1992

Huaxin Li  and
T. K. Chaki
Huaxin Li
Affiliation:
State University of New York, Department of Mechanical and Aerospace Engineering, Buffalo, NY 14260
T. K. Chaki
Affiliation:
State University of New York, Department of Mechanical and Aerospace Engineering, Buffalo, NY 14260
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Abstract

Hydrogen embrittlement has been studied in continuous cast sheet of a Ni 3 Alalloy (NI 77.83 AL 21.73 ZR 0.34 B 0.1), known as IC-50, after introducing various amounts of hydrogen cathodically. The elongation and UTS decreased with the increasing content of hydrogen. When tensile-tested at a strain rate of 5.8 × 10−5 s−1, the elongation decreased from 32.7% for no charging to 1.9% for 330 min of charging with 50 mA cm−2 current. The yield stress, however, did not change. When tested at a higher strain rate of 5.8 × 10−3 s−1, the embrittlement was less, but the yield stress increased with the hydrogen content. With increasing hydrogen content the fracture mode changed from dimpled to intergranular and cleavage modes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 288: Symposium L – High-Temperature Ordered Intermetallic Alloys V , 1992 , 989
Copyright
Copyright © Materials Research Society 1995

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References

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