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王梦寒,孟 烈,危 康,岳宗敏,汪丰林.Cu-Ag合金高温流变特性及其改进的本构模型[J].稀有金属材料与工程(英文),2017,46(12):3733~3738.[Wang Menghan,Meng Lie,Wei Kang,Yue Zonmin and Wang Fenglin.High temperature deformation properties and the modification of constitutive model of Cu-Ag alloy[J].Rare Metal Materials and Engineering,2017,46(12):3733~3738.]
High temperature deformation properties and the modification of constitutive model of Cu-Ag alloy
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Received:October 01, 2015  Revised:January 07, 2016
DOI:
Key words: Cu-6 wt.% Ag alloy  hot deformation  microstructure  twinning  constitutive model
Foundation item:中央高校基本科研业务费资助项目(CDJZR14130006)
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Wang Menghan,Meng Lie,Wei Kang,Yue Zonmin and Wang Fenglin  
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Abstract:
      The hot deformation behavior of Cu-6 wt.% Ag alloy was described by hot compression tests in the temperature range of 973~1123K and stain rates of 0.01~10s-1. The microstructure evolution of the alloy was investigated in this paper. The true stress-strain curves were studied to reveal the hot deformation mechanism of Cu-6 wt.% Ag alloy. A simple constitutive model was established. The Arrhenius equation and Z were quoted in this investigation to modified the model. The results show that the dynamic recovery, dynamic recrystallization occurred in Cu-6 wt.% Ag alloy during hot deformation. And twinning behavior was observed at the strain rates of 0.1s-1 and 1s-1 temperature of 1123K. This twining behavior result in sharp changing of flow stress. With the increase of flow stress, a valley of stress was observed directly. The modified model which integrated the influence of temperature, strain rates, strain on flow characteristic could predict the stress accurately and be compiled easily.