Constitutive modeling of flow behavior and processing maps of Mg-8.1 Gd-4.5Y-0.3Zr alloy
Constitutive modeling of flow behavior and processing maps of Mg-8.1 Gd-4.5Y-0.3Zr alloy
复制标题
DOI：
10.1016/j.jma.2020.02.018
复制
发表时间：
2020-09-01
影响因子：
17.6
通讯作者：
Li, Ting
中科院分区：
文献类型：
--
作者：
Xia, Xiangsheng;Zhang, Kui;Li, Ting
通过压缩试验研究了Mg-8.1Gd-4.5Y-0.3Zr合金的高温变形行为和加工性能。建立了考虑应变补偿的Arrhenius方程和加工图。结果表明，激活能Q、结构因子α、n和lnA随应变的变化而变化，它们之间的关系符合五次多项式。提取的模型预测的流动应力与实验结果吻合较好。加工图中有5个典型区域，通过金相组织分析确定了不同区域的变形机制。该合金的适宜加工窗口为400-500℃/0.001-0.1 S(-1)。(C)2020年，爱思唯尔公司代表重庆大学出版。
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.