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杨柳,官英平,段永川,屈晓阳.轧制态ME20M镁合金热拉伸变形行为及加工图[J].稀有金属材料与工程(英文),2020,49(5):1715~1721.[Yang Liu,Guan Yingping,Duan Yongchuan and Qu Xiaoyang.Hot Tensile Deformation Behavior and Processing Map of rolled ME20M Magnesium Alloy[J].Rare Metal Materials and Engineering,2020,49(5):1715~1721.]
Hot Tensile Deformation Behavior and Processing Map of rolled ME20M Magnesium Alloy
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Received:March 03, 2019  Revised:April 25, 2019
DOI:
Key words: ME20M magnesium alloy  hot deformation behavior  constitutive model  hot processing map
Foundation item:国家自然科学基金资助项目(项目号51275444;51705448);河北省自然科学基金资助项目(项目号E2018203254);河北省科技计划项目(项目11212104D;15215325)
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Yang Liu,Guan Yingping,Duan Yongchuan and Qu Xiaoyang  
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Abstract:
      The hot tensile deformation behaviors of rolled ME20M magnesium alloy at temperatures of 623-773K and strain rates of 0.001-0.1s-1 were studied by INSPEKT Table 100kN universal high temperature experimental machine. The effects of deformation temperature and strain rate on the flow stress of the material were analyzed, and the constitutive model and processing map under hot deformation conditions were established. The results show that the flow stress of the rolled ME20M magnesium alloy increases with the decrease of deformation temperature or the increase of strain rate. The predicted peak stress of the constitutive model is in good agreement with the experimental results, and the average relative error is 5.19%. After considering the influence of strain on the material constant in the constitutive model, the predicted stress value is highly correlated with the experimental value, and the average relative error is 6.00%. The best hot working range is 673-773K, the strain rate of 0.001-0.01 s-1.