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等通道转角挤压过程塑性变形行为的研究
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英文标题：Study on plastic deformation behavior of equal channel angular pressing process |
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作者：谭险峰 周庆 刘霞 |
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单位：南昌航空大学材料科学与工程学院 |
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关键词：等通道转角挤压 挤压力 等效应变 塑性变形 |
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分类号：TG376.2 |
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出版年,卷(期):页码：2009,34(5):52-54 |
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摘要：
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等通道转角挤压工艺是一种利用纯剪切变形获得块状超细晶材料的新技术。本文采用坐标网格法进行实验,获得了力-行程曲线和试样网格的变化,并应用Deform-3D有限元软件数值模拟了5052铝合金挤压塑性变形过程,将挤压后的实验结果同模拟结果进行比较,两者吻合较好,以此为基础,分析了挤压变形力和等效应变的分布规律,探讨了塑性变形的行为。
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Equal channel angular pressing(ECAP) is an advanced technology for the preparation of bulk ultra-fine grained materials by way of simple shear deformation.The coordinate grid method was used to carry on the experiment,and the relationship curve of load-stroke and the change of sample mesh were obtained.In the meantime,the plastic deformation processes for 5052 aluminum alloy were simulated by the Deform-3D software.The numerical solutions and experimental results were accordant.Based on the above results,the distributed law of the extrusion force and the equivalent strain were analyzed,and furthermore,the plastic deformation behavior was investigated.
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基金项目：
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江西省教育厅科学技术研究资助项目(DB200701053)
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作者简介：
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参考文献：
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[1]Valiev R Z,Islamgaliev R K,Alexandrov I V.Bulk nano-structured materials from severe plastic deformation[J].Progress in Materials Science,2000,45:103-189.
[2]Furukawa M,Horia Z,Nemoto M,et al.Reviewprocessingof metals by equal-channel angular pressing[J].Journal ofMaterial Science,2001,36:2835-2843.
[3]张郑,席明哲,王经涛.7475铝合金的ECAP组织细化研究[J].轻合金加工技术,2000,28(10):37-40.
[4]Iwahash Y,Horita Z,Nemoto M,et al.The process of grainrefinement in equal-channel angular pressing[J].Acta.Ma-ter.,1998,46(9):3317-3331.
[5]谭险峰,陈伟,熊洪淼,等.2A50铝合金单道次等通道转角挤压工艺研究[J].锻压技术,2008,33(6):63-65.
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