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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,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)
Author NameAffiliationE-mail
Wang Menghan College of Material Science and Engineering,Chongqing University cquwmh@163.com 
Meng Lie College of Material Science and Engineering,Chongqing University  
Wei Kang College of Material Science and Engineering,Chongqing University  
Yue Zonmin College of Material Science and Engineering,Chongqing University  
Wang Fenglin Institute for Materials Research,Tohoku University,Sendai -,Japan  
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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.