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| 稀土镁合金热压缩流变应力修正及热变形行为 |
| Correction of Hot Compression Flow Stress and Hot Deformation Behavior of Rare Earth Magnesium Alloy |
| Received:March 12, 2012 Revised:June 01, 2013 |
| DOI：10.3969/j.issn.1674-6457.2013.04.001 |
| 中文关键词: 稀土镁合金 热变形行为 变形激活能 微观组织 |
| 英文关键词: rare earth magnesium alloy hot deformation behavior deformation activation energy microstructure |
| 基金项目: |
| Author Name | Affiliation | | XIA Xiang-sheng | Southwest Technology and Engineering Research Institute, Chongqing 400039, China
National Defence Research and Application Centre of Precision Plastic Forming Technology, Chongqing 400039, China | | ZHANG Wei | Southwest Technology and Engineering Research Institute, Chongqing 400039, China | | WANG Chang-peng | Southwest Technology and Engineering Research Institute, Chongqing 400039, China | | LI Di-fan | Southwest Technology and Engineering Research Institute, Chongqing 400039, China | | WANG Yan-yan | Southwest Technology and Engineering Research Institute, Chongqing 400039, China | | SHU Da-yu | Southwest Technology and Engineering Research Institute, Chongqing 400039, China
National Defence Research and Application Centre of Precision Plastic Forming Technology, Chongqing 400039, China | | WAN Yuan-yuan | Southwest Technology and Engineering Research Institute, Chongqing 400039, China
National Defence Research and Application Centre of Precision Plastic Forming Technology, Chongqing 400039, China | | HUANG Zhi-wei | Southwest Technology and Engineering Research Institute, Chongqing 400039, China
National Defence Research and Application Centre of Precision Plastic Forming Technology, Chongqing 400039, China |
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| 中文摘要: |
| 在 Gleeble-1500 D 热模拟机上采用等温压缩实验研究了 Mg-7 Gd-5 Y-1 Nd-0 . 5 Zr 合金的高温压缩变形行为,获得合金在温度为 350 ~ 530 ℃ 、应变速率为 0 . 005 ~ 5 s-1条件下的流变应力曲线。 对流变应力曲线进行了摩擦和变形热修正。 通过摩擦与温升修正后的应力值,计算出了平均热激活能和应力指数,Q =262 . 608 kJ / mol,n = 3 . 745 ,分析得出了变形激活能随温度的变化规律。 结合显微组织演变,合金的热锻初始温度应在 500 ~ 530 ℃ 为宜。 |
| 英文摘要: |
| The hot deformation behaviors of Mg-7Gd-5Y-1Nd-0. 5Zr alloy were investigated by hot compression tests with Gleeble1500D thermal simulator. The flow stress curves in the temperature range of 350 ~ 530 ℃ and strain rate of 0. 005 ~ 5 s-1 were obtained. The flow stress curves were corrected in consideration of the friction and deformation. Deformation activation energy and stress exponent were calculated based on the corrected flow stress, which were 262. 608 kJ / mol and 3. 745, respectively, and the variation of deformation activation energy with temperature was discussed. The initial temperature range for hot-forging of the alloy was suggested to be 500 ~ 530 ℃ . |
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