异步轧制AZ31镁合金板材的超塑性工艺及变形机制OA北大核心CSCDCSTPCD
Superplastic Process and Deformation M echanism of Asymmetrically Rolled AZ31 Magnesium Alloy
经过异步轧制工艺获得AZ31镁合金薄板。在300~450℃范围内,分别通过5×10-3,1×10-3 s-1和5×10-4 s-1不同应变速率进行高温拉伸实验研究其超塑性变形行为,计算应变速率敏感指数 m值、超塑性变形激活能 Q及门槛应力σ0值。通过EBSD分析和扫描电镜观察拉伸断裂后的断口形貌,分析AZ31镁合金的超塑性变形机制。结果表明:AZ31镁合金的塑性变形能力随着变形温度的升高及应变速率的降低而增强。当拉伸温度为400℃、m=0.72、…查看全部>>
AZ31 magnesium alloy sheet was prepared by asynchronous rolling process .From 300℃ to 450℃ ,tensile test was conducted with different strain rates of 5 × 10-3 ,1 × 10-3 s-1 and 5 × 10-4 s-1 respectively to investigate the superplastic deformation behavior of AZ31 magnesium alloy .T he value of the strain rate sensitive index m ,the superplastic deformation activation energy Q and the threshold stress σ0 were also calculated . The superplastic deformation mec…查看全部>>
江海涛;段晓鸽;蔡正旭;王丹
北京科技大学冶金工程研究院,北京100083北京科技大学冶金工程研究院,北京100083北京科技大学冶金工程研究院,北京100083北京科技大学冶金工程研究院,北京100083
矿业与冶金
AZ31镁合金晶粒细化超塑性工艺变形机制
AZ31 magnesium alloygrain refinementsuperplastic processdeformation mechanism
《材料工程》 2015 (8)
7-12,6
国家科技支撑计划课题资助项目(2011BAE22B03)
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