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楚志兵,张铎,马立峰,江连运,杨小容,黄庆学.基于动态再结晶的铸态AZ31B镁合金本构方程[J].稀有金属材料与工程(英文),2018,47(1):124~130.[Chu Zhibing,Zhang Duo,Ma Lifeng,Jiang Lianyun,Yang Xiaorong and Huang Qingxue.Constitutive Equation of As-cast AZ31B Magnesium Alloy Based on Dynamic Recrystallization[J].Rare Metal Materials and Engineering,2018,47(1):124~130.]
Constitutive Equation of As-cast AZ31B Magnesium Alloy Based on Dynamic Recrystallization
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Received:November 04, 2016  Revised:January 05, 2017
DOI:
Key words: as-cast AZ31B  critical stress model  constitutive model dynamic recrystallization
Foundation item:国家自然科学基金资助项目(51375325);山西省青年科技基金资助项目(2015021111);专利推广实施资助专项(20161006);山西省研究生教育创新项目(2016SY055);校博士科研启动项目(20122017)
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Chu Zhibing,Zhang Duo,Ma Lifeng,Jiang Lianyun,Yang Xiaorong and Huang Qingxue  
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Abstract:
      The true stress-strain curves of as-cast AZ31B magnesium under different temperature and strain rate can be obtained from GLEEBLE compression experiment. Critical strain model, saturated stress model and static stress model can be received by analyzing true stress-strain curves. Based on the classical dislocation density theory and the dynamic recrystallization (DRX) kinetics models, a two-stage constitutive model considering the effect of work hardening-dynamic recovery and DRX is developed for the as-cast AZ31B magnesium alloy. And the relation between the percentage of DRX and flow stress is obtained.