| 温度对AZ80镁合金等通道转角挤压组织性能的影响 |
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| 引用本文： | 李继忠,张念先,丁桦,李英龙.温度对AZ80镁合金等通道转角挤压组织性能的影响[J].塑性工程学报,2011,18(3). |
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| 作者姓名： | 李继忠 张念先 丁桦 李英龙 |
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| 作者单位： | 东北大学材料与冶金学院,沈阳,110819 |
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| 摘 要： | 对镁合金AZ80分别在温度320℃和200℃下进行多道次等通道转角挤压。在较高温度320℃挤压时,晶粒尺寸先减少后增加,硬度先增加后降低。在较低温度200℃下挤压,初始道次挤压后,材料内位错密度和孪晶含量增加,相对应的硬度增加幅度显著;挤压4道次后,大部分区域晶粒细化到200nm左右。受晶粒细化强化与织构软化的共同作用,硬度较前两道次增加幅度不明显。
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| 关 键 词： | 等通道转角挤压 镁合金AZ80 晶粒细化 硬度 |
The effect of temperature on microstructure and hardness of AZ80 Mg alloy during equal channel angular pressing |
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| LI Ji-zhong,ZHANG Nian-xian,DING Hua,LI Ying-long.The effect of temperature on microstructure and hardness of AZ80 Mg alloy during equal channel angular pressing[J].Journal of Plasticity Engineering,2011,18(3). |
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| Authors: | LI Ji-zhong ZHANG Nian-xian DING Hua LI Ying-long |
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| Affiliation: | LI Ji-zhong ZHANG Nian-xian DING Hua LI Ying-long(School of materials and metallurgy,Northeastern University,Shenyang 110819 China) |
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| Abstract: | AZ80 Mg alloy was processed at 320℃ and 200℃ by equal channel angular pressing.At 320℃,the grain size was decreased at previous two passes and then increased in the subsequent passes.At 200℃,both the density of dislocation and twinning were increased at previous two passes with the hardness dramatically increased.After 4 passes with route Bc,the grain size was refined to 200nm in most of areas,but the hardness slightly increased due to the interaction of grain refinement strengthening and texture softening. |
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| Keywords: | equal channel angular pressing Mg alloys AZ80 grain refinement hardening |
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