Number： 01099016 Download Name： 蔣志德 Titles： Assistant Professor Author： LEE Shyong、CHIANG Chihte、LEU Jyhshyan、 And CHEN Yunghung Paper name： Superplastic elongation characteristic of fine grained magnesium alloy ZK60 Name of activity： RARE METALS Keywords：magnesium alloy; superplastic elongation; rolling process; grain regining Abstract： This paper employs simple rolling process plus annealing to reline the grain size of magnesium alloy ZK6O. This goal is effectively achieved, obtaining grains as line as ~3.7 μm. Such a specimen shows an elongation of 642%. And its ultimate fracture surface exhibits intergranular sepalation and significant grain growth. Additionally, the effects of the specimen’s geometry and tensile test axis with respect to the rolling direction on superplastic elongation is studied, which has not been done before.