MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Tensile Properties of Internally Hydrided and T6-Treated Mg-10%Y-2%Nd Alloys at Elevated Temperatures
Shotaro MorozumiHiroshi Saikawa
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2001 Volume 42 Issue 7 Pages 1268-1272

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Abstract

Chill-cast Mg–10%Y–2%Nd alloy was internally hydrided and examined for tensile properties up to 773 K by short-time tensile and creep tests at strain-rates of 1.4×10−9 to 2.78×10−4 s−1, in comparison with those of the T6-treated alloy. The results obtained were analyzed for the relationship of stress, σ (0.2% yield stress or applied creep stress), vs. strain rate, \\dotε (initial strain rate or minimum creep rate). Generally, the stress exponent, n (=dlog\\dotε⁄dlogσ)-value of the hydrided alloy is larger than that of the T6-treated alloy at the same test temperature. Consequently, the strength of the hydrided alloy becomes higher than that of the T6-treated alloy at strain rates lower than 10−5 s−1 at and above 723 K . This fact can be attributed to the stable hydride precipitates in the internally hydrided alloy.

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© 2001 The Japan Institute of Metals and Materials
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