Effects of heat treatment on microstructure and mechanical properties of extruded AZ80 magnesium alloy
Effects of heat treatment on microstructure and mechanical properties of extruded AZ80 magnesium alloy
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热处理对挤压AZ80镁合金显微组织和力学性能的影响
DOI：
10.1016/j.matdes.2013.11.072
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发表时间：
2014-04
影响因子：
8.4
通讯作者：
Geng, Haoran
中科院分区：
文献类型：
--
作者：
Zhao, Degang;Wang, Zhenqing;Zuo, Min;Geng, Haoran
研究了挤压态AZ 80镁合金在不同热处理条件下的组织演变及β-Mg 17 Al 12相的析出行为。固溶处理使β-Mg 17 Al 12相溶解，晶粒粗化。在时效过程中，不连续的析出物优先在一些晶界处开始，然后在晶粒内部出现连续的析出物。在直接时效阶段，带状组织之间形成不连续的析出相，没有连续析出相出现。在固溶和时效处理之后，获得了改进的强度和延伸率的组合。挤压态AZ 80镁合金试样经直接时效处理后强度最高。
Microstructure evolution of the extruded AZ80 magnesium alloy and different precipitation behavior of β-Mg17Al12phase in different heat treatment conditions were investigated. Solution treatment caused the dissolution of β-Mg17Al12phase and the grain coarsening. During aging, discontinuous precipitates were preferentially initiated at some of the grain boundaries and then continuous precipitates appeared in the grain interiors. In the period of direct-aging, discontinuous precipitates formed between the banded structure and no continuous precipitate appeared. After solution and aging treatment, an improved combination of strength and elongation was obtained. The highest strength was achieved for the extruded AZ80 sample after directing-aging treatment.
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