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High temperature deformation properties and the modification of constitutive model of Cu-Ag alloy
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College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,College of Material Science and Engineering,Chongqing University,Institute for Materials Research,Tohoku University,Sendai -,Japan

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TG146.11

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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.

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[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.]
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History
  • Received:October 01,2015
  • Revised:January 07,2016
  • Adopted:February 24,2016
  • Online: January 04,2018
  • Published: