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| ON THE BEHAVIOR OF HIGH TEMPERATURE CREEP OF A Mg-1.5% Th-0.8% Mn ALLOY |
| HE KUANG-HSING;HU SU-HUI Institute of Metallurgy; Academia Sinica |
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Cite this article:
HE KUANG-HSING;HU SU-HUI Institute of Metallurgy; Academia Sinica. ON THE BEHAVIOR OF HIGH TEMPERATURE CREEP OF A Mg-1.5% Th-0.8% Mn ALLOY. Acta Metall Sin, 1965, 8(1): 88-130.
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Abstract The creep behavior of a Mg-Th-Mn alloy at 350℃ under a constant load cor-responding to an initial stress of 3.0 kg/mm~2 has been investigated. The shape of thecreep curve of cold-worked specimens differs from that of annealed ones in that the steadycreep stage is almost absent in the latter though it is remarkable in the former. Forthe annealed specimens slip has been observed in the first stage of creep, and poly-gonization and grain boundary gliding have been shown to occur in the third stage. Thatthese processes take place simultaneously and also react with each other may be the reasonfor the absence of the steady stage of creep in annealed specimens. It is assumed thatcold-working strengthens the grains, thus slowing down the rate of grain boundary gliding. The intercrystalline fracture of this alloy is mainly due to the stress concentrationaccording to Zener's mechanism.
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Received: 18 January 1965
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