| AZ31镁合金热轧边裂预判模型研究 |
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| 引用本文： | 黄志权,黄庆学,韦建春,马立峰,朱艳春,帅美荣.AZ31镁合金热轧边裂预判模型研究[J].稀有金属材料与工程,2016,45(6):1461-1466. |
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| 作者姓名： | 黄志权 黄庆学 韦建春 马立峰 朱艳春 帅美荣 |
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| 作者单位： | 太原科技大学机械工程学院 重型机械教育部工程研究中心,太原科技大学机械工程学院,太原科技大学机械工程学院,太原科技大学机械工程学院,太原科技大学机械工程学院,太原科技大学机械工程学院 |
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| 基金项目： | 国家重点基础研究发展计划(2012CB722800),山西省科技创新项目(2015172),太原科技大学校博士科研启动基金(20142033) |
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| 摘 要： | 采用等压法,通过等温热压缩实验获得了AZ31镁合金变形温度和应变速率分别在473~673 K和0.005~5 s-1条件下对临界断裂应变的影响规律,以及Zener-Hollomon表达式,据此针对AZ31建立了临界断裂应变与变形温度和应变速率间的基本模型;在此基础上,基于镁合金轧制边裂的基本机理,引入CockcroftLatham断裂准则,建立了含有材料变形激活能和基本轧制工艺参数的AZ31镁合金轧制边裂预判模型;并通过相同条件下有限元模拟和热轧试验分别得到沿板宽方向损伤值和边部裂纹深度,以此对所建立的边裂预判模型进行验证,结果显示所建立边裂预判模型的预测值和实测值平均误差为11.3%。
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| 关 键 词： | AZ31镁合金 热轧 边裂 数学模型 |
| 收稿时间： | 2015/7/23 0:00:00 |
| 修稿时间： | 8/9/2015 12:00:00 AM |
PREDICTED EDGE CRACK MODEL OF HOT ROLLING FOR AZ31 MAGNESIUM Alloy |
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| Huang Zhiquan,Huang Qingxue,Wei Jianchun,Ma Lifeng,Zhu Yanchun and Shuai Meirong.PREDICTED EDGE CRACK MODEL OF HOT ROLLING FOR AZ31 MAGNESIUM Alloy[J].Rare Metal Materials and Engineering,2016,45(6):1461-1466. |
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| Authors: | Huang Zhiquan Huang Qingxue Wei Jianchun Ma Lifeng Zhu Yanchun and Shuai Meirong |
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| Affiliation: | College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,College of Mechanical Engineering,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology |
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| Abstract: | Base on equal pressure method, isothermal compression tests of AZ31 magnesium alloy at different strain rates of 0.005-5 s?1 and different deformation temperatures of 473-673K were performed by using Gleeble-1500 simulator. The in?uences of deformation temperature and strain rate on the ?ow stress and critical fracture strain were investigated, and established the basic model of critical fracture strain of AZ31. And then the predicted edge cracking model of hot rolling for AZ31 was obtained based on the basic principles of magnesium alloy rolling edge cracking and fracture criterion of Cockcroft Latham, which contains the material deformation activation energy and the technology parameters of rolling. In order to verify the correctness of the predicted edge cracking model was established ,the corresponding relationship was obtained between damage value and edge crack depth along the width direction by the finite element simulation and rolling experiments in the same conditions. The results showed that the average error was 11.3% between predicted values and measured values . |
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| Keywords: | AZ31 Mg alloy hot rolling edge crack mathematical model |
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