Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures
Effects of texture and grain size on mechanical properties of AZ80 magnesium alloys at lower temperatures
复制标题
织构和晶粒尺寸对AZ80镁合金低温力学性能的影响
DOI：
10.1016/j.matdes.2015.09.153
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发表时间：
2016-01-05
影响因子：
8.4
通讯作者：
Vedani, Maurizio
中科院分区：
文献类型：
--
作者：
Wang, Lifei;Mostaed, Ehsan;Vedani, Maurizio
In order to investigate the effect of texture and grain size on mechanical properties of AZ80 magnesium alloy at lower temperatures, ECAP was conducted for 1,2 and 4 passes at 523 K. Tensile and compressive tests were carried out on the ECAP processed samples at room temperature, 373 K and 423 K, respectively. The results showed that a significant grain refinement took place and the original extrusion fiber texture evolved into a new preferred crystal orientation, featuring a favorable alignment of the basal planes along shear planes after ECAP process. At room temperature grain refinement strengthening played an important role, leading to an improvement of mechanical properties with increasing number of ECAP passes. However, at higher temperature, texture and grain boundary sliding (GBS) mechanisms controlling deformation behaviors, resulting in a softening effect and considerable fracture elongation improvement, as well as yield asymmetry reduction. (C) 2015 Elsevier Ltd. All rights reserved.
