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黄庆学,韦建春,黄志权,马立峰,朱艳春,吴冬祖.AZ31镁合金板材轧制边裂深度预判模型研究[J].稀有金属材料与工程(英文),2018,47(6):1926~1930.[Huang Qingxue,Wei Jianchun,Huang Zhiquan,Ma Lifeng,Zhu Yanchun and Wu Dongzu.Study on Prediction Model of Edge Crack Depth of Rolled AZ31 Magnesium Alloy Sheet[J].Rare Metal Materials and Engineering,2018,47(6):1926~1930.]
Study on Prediction Model of Edge Crack Depth of Rolled AZ31 Magnesium Alloy Sheet
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Received:May 25, 2016  Revised:July 02, 2016
DOI:
Key words: AZ31 magnesium aloy  microstructure  edge crack depth  prediction model
Foundation item:国家自然科学基金青年项目(51501122),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),晋城市科技计划项目(201502001-1),太原科技大学研究生创新项目(20151020)
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Huang Qingxue,Wei Jianchun,Huang Zhiquan,Ma Lifeng,Zhu Yanchun and Wu Dongzu  
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Abstract:
      In this study, the numerical simulation of rolling process and experimental verification was carried out at 400℃ temperature of as-cast the AZ31 magnesium alloy sheet with initial thickness of 7mm. The reduction was 10%, 15%, 20%, 25%, 30%, 35%, 40% and 45%, respectively. Microstructure and edge crack were analyzed after rolling. The results show that the edge crack was occurred when the single pass reduction up to 20%. The edge crack depth has increased from 5.04mm of 20% reduction to 14.05mm of 45% in current rolling condition. According to numerical simulation results, the damage distribution along the width of the plate was obtained. And we have established the prediction model of edge crack depth. For the edge crack depth, the average error between the actual measured data and the calculated value by the prediction model is 9.23%. The SEM observation results show that the microstructure near the edge crack contain a large number of twins.