MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Effect of Continuous Hydrogen Charging on Tensile and Fatigue Properties of Amorphous Ni-Zr Alloy Membranes
K. HorikawaK. YamaueH. Kobayashi
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2008 Volume 49 Issue 10 Pages 2238-2242

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Abstract

Effect of hydrogen charging on mechanical properties in tensile and fatigue tests was investigated for the Ni-Zr amorphous alloy membranes with and without palladium plating. As a result of the tensile test, it was shown that both tensile strength and fracture strain decreased by continuous hydrogen charging in all the specimens. It was also found that palladium plating reduced effectively the hydrogen embrittlement sensitivity. Fatigue properties were also lowered by hydrogen charging. In the specimen without hydrogen charging, fatigue limit was about 600–700 MPa, while in the specimen with hydrogen charging, no clear fatigue limit was observed. Fracture morphology was changed from the vein-like patterns to the shell patterns by hydrogen charging, both after the tensile test and the fatigue test.

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© 2008 The Japan Institute of Metals and Materials
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