| 基于动态再结晶的铸态AZ31B镁合金本构方程 |
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| 引用本文： | 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,2018,47(1):124-130. |
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| 作者姓名： | 楚志兵 张铎 马立峰 江连运 杨小容 黄庆学 |
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| 作者单位： | 太原科技大学,太原科技大学,太原科技大学,太原科技大学,太原科技大学,太原科技大学 |
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| 基金项目： | 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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| 摘 要： | 通过GLEEBLE压缩试验获得铸态AZ31B镁合金真应力应变曲线,本试验从真应力应变曲线出发,通过数值分析获得临界应力应变模型、饱和应力模型和稳态应力模型等多种应力模型。同时,结合位错理论和动态再结晶动力学,根据镁合金在变形过程中发生动态再结晶的临界点,将应力应变曲线分为两段,分别对以动态回复为主的曲线和以动态再结晶为主的曲线建立本构模型,分析并得出了动态再结晶分数与基于动态再结晶下的流变应力之间的变化规律。
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| 关 键 词： | 铸态AZ31B 位错理论 本构模型 动态再结晶百分数 |
| 收稿时间： | 2016/11/4 0:00:00 |
| 修稿时间： | 2017/1/5 0:00:00 |
Constitutive Equation of As-cast AZ31B Magnesium Alloy Based on Dynamic Recrystallization |
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| 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. |
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| Authors: | Chu Zhibing Zhang Duo Ma Lifeng Jiang Lianyun Yang Xiaorong and Huang Qingxue |
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| Affiliation: | Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan,Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan,Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan,Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan,Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan,Heavy Machinery Eng Research Center of Ministry of Education,Taiyuan University of Science and Technology Taiyuan |
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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. |
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| Keywords: | as-cast AZ31B critical stress model constitutive model dynamic recrystallization |
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