Processing map and hot working mechanisms of Cu-Ag alloy in hot compression process
来源期刊：中南大学学报(英文版)2015年第3期
论文作者：WANG Meng-han(王梦寒) 黄龙 CHEN Ming-liang(陈明亮) WANG Yan-li(王彦丽)
文章页码：821 - 828
Key words：Cu-Ag alloy; strain-rate sensitivity; hot working mechanism; processing map
Abstract: For Gu-Ag alloy, an important parameter called workability in the forming process of materials can be evaluated by processing maps yielded from the stress-strain data generated by hot compression tests at temperatures of 700-850 °C and strain rates of 0.01-10 s-1. And at the true strain of 0.15, 0.35 and 0.55, respectively, the responses of strain-rate sensitivity, power dissipation efficiency and instability parameter to temperature and strain rate were studied. Instability maps and power dissipation maps were superimposed to form processing maps, which reveal the determinate regions where individual metallurgical processes occur and the limiting conditions of flow instability regions. Furthermore, the optimal processing parameters for bulk metal working are identified clearly by the processing maps.
WANG Meng-han(王梦寒), HUANG Long(黄龙), CHEN Ming-liang(陈明亮), WANG Yan-li(王彦丽)
(School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China)
Abstract:For Gu-Ag alloy, an important parameter called workability in the forming process of materials can be evaluated by processing maps yielded from the stress-strain data generated by hot compression tests at temperatures of 700-850 °C and strain rates of 0.01-10 s-1. And at the true strain of 0.15, 0.35 and 0.55, respectively, the responses of strain-rate sensitivity, power dissipation efficiency and instability parameter to temperature and strain rate were studied. Instability maps and power dissipation maps were superimposed to form processing maps, which reveal the determinate regions where individual metallurgical processes occur and the limiting conditions of flow instability regions. Furthermore, the optimal processing parameters for bulk metal working are identified clearly by the processing maps.
Key words:Cu-Ag alloy; strain-rate sensitivity; hot working mechanism; processing map
