Static recrystallization kinetics of a heavily cold drawn AZ31 magnesium alloy under annealing treatment
Static recrystallization kinetics of a heavily cold drawn AZ31 magnesium alloy under annealing treatment
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DOI：
10.1016/j.matchar.2011.01.007
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发表时间：
2011-03-01
影响因子：
4.7
通讯作者：
Wang, E. D.
中科院分区：
文献类型：
--
作者：
Chao, H. Y.;Sun, H. F.;Wang, E. D.
AZ 31镁合金挤压丝材在室温下冷拉至累积断面收缩率为61%，然后进行各种退火处理。研究了变形态和退火态的显微组织、织构演变、拉伸性能和显微硬度。结果表明，大变形试样经静态再结晶后，晶粒得到细化，退火温度对组织演变的影响比退火时间更显著。在退火过程中，基体织构得到明显强化，变形纤维织构由< 10（1）/bar 0>方向逐渐演变为2（1）/bar（1）/bar 0>方向。对退火过程中再结晶动力学的分析表明，JMAK模型能很好地描述退火过程中的再结晶动力学。再结晶活化能为85.9kJ/mol。提出了大变形AZ 31合金退火过程中静态再结晶的自洽模型。皇冠版权所有（C）2011由爱思唯尔公司出版。All rights reserved.
AZ31 Mg alloy extrusion wires were successfully cold drawn to a cumulative area reduction of 61% at room temperature and then subjected to various annealing treatments. Microstructure, texture evolution, tensile properties and microhardness of the asdeformed and as-annealed samples were investigated. The results showed that grain size was refined after static recrystallization in the severely deformed sample, and the annealing temperature had more significant effect on the microstructural evolution than the annealing time. During the annealing process, the basal texture was notably strengthened and the deformed fibrous texture was evolved gradually from < 10 (1) over bar0 > direction to 2 (1) over bar(1) over bar0 > direction. The analysis on the recrystallization kinetic during annealing indicated that it could be well described by JMAK model. The activation energy for recrystallization was calculated to be about 85.9 kJ/mol. Moreover, a self-consistent model of static recrystallization occurred during annealing of the heavily deformed AZ31 alloy was proposed. Crown Copyright (C) 2011 Published by Elsevier Inc. All rights reserved.