| Ti-5Mo-5V-2Cr-3Al合金热压缩变形行为 |
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| 引用本文： | 魏衍广,陶海明,陈海珊.Ti-5Mo-5V-2Cr-3Al合金热压缩变形行为[J].稀有金属,2011,35(3). |
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| 作者姓名： | 魏衍广 陶海明 陈海珊 |
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| 作者单位： | 北京有色金属研究总院粉末冶金及特种材料研究所,北京,100088 |
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| 摘 要： | 对Ti-5Mo-5V-2Cr-3Al钛合金进行等温压缩实验,变形温度范围为923～1123 K,应变速率为0.001～1 s<'-1>.分析表明该材料的流变应力对温度与应变速率敏感:当变形温度为923～1023 K时,流变应力曲线呈现动态再结晶曲线特征;当变形温度为1073 K时,低应变速率(0.001s<'-1>)的流变应力曲线呈现动态再结晶曲线特征,高应变速率(0.01-1 s<'-1>)的流变应力曲线呈现动态回复曲线特征;当变形温度为1123 K时,流变应力曲线呈现动态回复曲线特征;峰值流变应力随着变形温度的升高而下降,且下降速率随着温度升高而降低;峰值流变应力随着应变速率的升高而升高,升高速率在923～1023 K范围内随着应变速率升高而下降,在1073 K时随着应变速率升高而升高,在1123 K时随着应变速率升高无变化.Ti-5Mo-5V-2Cr-3Al钛合金在等温压缩变形时的流变行为可用包含Zener-Holomon参数的Arrhenius本构方程描述,变形激活能为789 kJ·mol-1.
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| 关 键 词： | Ti-5Mo-5V-2Cr-3Al合金 等温压缩 本构方程 流变应力 |
Hot Compressive Behavior of Ti-5Mo-5V-2Cr-3Al Alloy |
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| Wei Yanguang,Tao Haiming,Chen Haishan.Hot Compressive Behavior of Ti-5Mo-5V-2Cr-3Al Alloy[J].Chinese Journal of Rare Metals,2011,35(3). |
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| Authors: | Wei Yanguang Tao Haiming Chen Haishan |
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| Affiliation: | Wei Yanguang,Tao Haiming,Chen Haishan (Research Department of Powder Metallurgy and Special Materials,Beijing General Research Institute for Non-Ferrous Metals,Beijing 100088,China) |
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| Abstract: | Isothermal compression test of Ti-5Mo-5V-2Cr-3Al alloy was carried out with the temperature range of 923~1123 K and the strain rate range of 0.001~1 s-1.The results showed that flow stress was sensitive to deformation temperature and strain rates.Dynamic recrystallization occurred in the temperature range of 923~1023 K.When the temperature was 1073 K,dynamic recrystallization occurred at a strain rate of 0.001 s-1,and dynamic recovery occurred in the strain rate range of 0.01~1 s-1.Dynamic recovery occurred... |
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| Keywords: | Ti-5Mo-5V-2Cr-3Al alloy isothermal compression constitutive equation flow stress |
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