Journal
JOURNAL OF MAGNESIUM AND ALLOYS
Volume 8, Issue 3, Pages 917-928Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.jma.2020.02.018
Keywords
Mg-Gd-Y-Zr alloy; Workability; Strain compensation; Processing map
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Funding
- National Natural Science Foundation of China [51501015]
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High temperature deformation behavior and workability of Mg-8.1Gd-4.5Y-0.3Zr alloy were studied by compression tests. Arrhenius equation with strain compensation and processing maps were established. The results show that the activation energy Q, structure factor alpha, n and ln A varies with the strain, its relationship fit well by fifth order polynomial. The flow stresses predicted by the extracted model are in good agreement with the experimental results. There are five typical domains in the processing map, and the deformation mechanisms in different domains were determined by microstructure analysis. The feasible processing window of the alloy is in the areas of 400-500 degrees C/0.001-0.1 s(-1). (c) 2020 Published by Elsevier B.V. on behalf of Chongqing University.
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