Low Temperature Superplasticity in a ZK60 Magnesium Alloy
作者： Hiroyuki Watanabe , Toshiji Mukai , Masahide Kohzu , Shigenori Tanabe , Kenji Higashi
DOI: 10.2320/MATERTRANS1989.40.809
关键词:
摘要: Low temperature superplastic behavior of a magnesium alloy, ZK60, was investigated at about half the absolute melting point. The grains were equiaxed with an average size 6.5 μm. tensile tests revealed that material exhibited low superplasticity (LTSP) elongation-to-failure over 400%. Microstructural observations suggested grain boundary sliding (GBS) made substantial contribution to total strain. stress exponent, exponent and activation energy for flow also characterized. strain rate inversely proportional cube second power stress. close diffusion in magnesium. It is deformation mechanism LTSP GBS accommodated by dislocation movement controlled diffusion.
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