2002 年 43 巻 10 号 p. 2433-2436
Superplastic behavior and microstructural evolution in a commercial Mg–3Al–1Zn magnesium alloy were investigated at temperatures between 623 K and 723 K and strain rates between 10−5 and 10−3 s−1. Grain refinement was obtained in the test alloy due to the dynamic recrystallization during an initial stage of tensile test. As a result, the alloy exhibited good superplasticity at all strain rates and temperatures, and a maximum elongation of 314% was obtained. The results of optical microscopy and SEM revealed that the dominant deformation mechanism was grain boundary sliding, and the dynamic recrystallization was the accommodated mechanism for the deformation.
