卢立伟,赵俊,刘龙飞,邵根波,刘天模

• 1:湖南科技大学机电工程学院
• 2:重庆大学国家镁合金工程技术中心

摘要(Abstract)：

以AZ31镁合金为研究对象,对其进行了双向挤压与等通道复合变形模型的数值模拟计算,分析了模具转角对金属流动状态、等效应力、应变与挤压力的影响,并定量的分析了等效应变分布的不均匀程度。结果表明:AZ31镁合金经过双向挤压与等通道复合变形后发生了剧烈的塑性变形,应力主要集中在模具转角剪切区,且能有效的获得高的均匀等效应变值。

关键词(KeyWords)： AZ31镁合金;有限元模拟;复合挤压;模具转角

Abstract:

Keywords:

基金项目(Foundation): 湖南省自然科学基金资助项目(14JJ3111);; 校博士科研启动基金(E51353);; 湖南省自然科学湘潭联合基金项目(12JJ9011)

作者(Author): 卢立伟,赵俊,刘龙飞,邵根波,刘天模

DOI: 10.13289/j.issn.1009-6264.2014.07.036

参考文献(References)：

• [1]刘天模,刘世宇,彭天成,等.AZ31镁合金变通道角挤压工艺[J].材料热处理学报,2009,30(5):64-67.LIU Tian-mo,LIU Shi-yu,PENG Tian-cheng,et al.Change channel angular extrusion process of AZ31 magnesium alloy[J].Transactions of Materials and Heat Treatment,2009,30(5):64-67.
• [2]宁俊生,范亚夫,彭秀峰.镁合金在大变形和高应变率下塑性变形研究进展[J].材料工程,2007(9):67-73.NING Jun-sheng,FAN Ya-fu,PENG Xiu-feng.Research and progress of plastic deformation of magnesium alloys at high strain rate and large deformation[J].Journal of Materials Engineering,2007(9):67-73.
• [3]王斌,易丹青,顾威,等.ZK60镁合金型材挤压过程有限元数值模拟[J].材料科学与工艺,2010,18(2):272-278.WANG Bin,YI Dan-qing,GU Wei,et al.Finite element numerical simulation on extrusion process of ZK60 magnesium alloy sectional material[J].Materials Science and Technology,2010,18(2):272-278.
• [4]张力,卢立伟,刘天模,等.AZ31镁合金双向挤压有限元模拟与实验分析[J].材料导报,2009,23(10):75-78.ZHANG Li,LU Li-wei,LIU Tian-mo,et al.Simulation and experiment analysis of dua-l directional extrusion of AZ31 Mg alloy[J].Materials Review,2009,23(10):75-78.
• [5]马茹,王守仁.AZ31镁合金棒材挤压过程的三维有限元分析[J].济南大学学报:自然科学版:,2011,25(4):344-348.MA Ru,WANG Shou-ren.Three-dimensional finite element analysis of extrusion forming of AZ31 magnesium alloy bar[J].Journal of University of Jinan:Science and Technology,2011,25(4):344-348.
• [6]任国成,赵国群,徐淑波,等.AZ31镁合金等通道转角挤压变形均匀性有限元分析[J].中国有色金属学报,2011,21(4):848-855.REN Guo-cheng,ZHAO Guo-qun,XU Shu-bo,et al.Finite element analysis of homogeneous deformation of AZ31 magnesium during equal channel angular pressing process[J].The Chinese Journal of Nonferrous Metals,2011,21(4):848-855.
• [7]于彦东,周浩.MB15合金等通道转角挤压组织模拟和实验分析[J].中国有色金属学报,2011,21(2):296-302.YU Yan-dong,ZHOU Hao.Simulation and experiment analysis of grain structure of MB15 alloy prepared by equal-channel angular pressing[J].The Chinese Journal of Nonferrous Metals,2011,21(2):296-302.
• [8]Esmailzadeh M,Khafri A M.Finite element and artificial neural network analysis of ECAP[J].Computational Materials Science,2012,63:127-133.
• [9]Seniatin S L,Delo D P,Shell E B.The effect of material properties and tooling design on deformation and fracture during equal channel angular extrusion[J].Acta Materialia,2000,48:1841-1851.
• [10]Ghazani S M,Eghbali B.Finite element simulation of cross equal channel angular pressing[J].Computational Materials Science,2013,74:124-128.
• [11]Suo T,Li Y L,Deng Q,et al.Optimal pressing route for continued equal channel angular pressing by finite element analysis[J].Materials Science and Engineering A,2007,466(1-2):166-171.
• [12]乔端,钱仁根.非线性有限元及其在塑形加工中的应用[M].北京:冶金工业出版社,1990.
• [13]李英杰,张秀芝,李锋,等.镁合金等通道转角挤压的研究[J].科学之友,2008,35:15-18.LI Ying-jie,ZHANG Xiu-zhi,LI Feng,et al.Study on ECAP of Magnesium alloy[J].Friend of Science Amateurs,2008,35:15-18.
• [14]Jiang H,Fan Z G,Xie C Y.3D finite element simulation of deformation behavior of CP-Ti and working load during multi-pass equal channel angular extrusion[J].Materials Science and Engineering A,2008,485(1-2):409-414.
• [15]张丁非,张钧萍,胡红军,等.等通道挤压工艺的有限元模拟研究进展[J].材料导报,2011,25(8):127-130.ZHANG Ding-fei,ZHANG Jun-ping,HU Hong-jun,et al.Development of ECAP Process by FEM[J].Materials Review,2011,25(8):127-130.
• [16]刘婷,徐淑波,任国成,等.AZ31镁合金等通道转角挤压工艺优化与实验研究[J].燕山大学学报,2013,37(2):111-116.LIU Ting,XU Shu-bo,REN Guo-cheng,et al.Process optimization and experimental study of equal channel angular pressing for AZ31 magnesiumalloy[J].Journal of Yanshan University,2013,37(2):111-116.
• [17]Lin H K,Huang J C,Langdon T G.Relationship between texture and low temperature superplasticity in an extruded AZ31 Mg alloy processed by ECAP[J].Materials Science and Engineering A,2005,402(1-2):250-257.
• [18]胡红军.变形镁合金挤压-剪切复合制备新技术研究[D].重庆大学,2010.
• [19]Djavanroodi F,Ebrahimi M.Effect of die channel angle,friction and back pressure in the equal channel angular pressing using 3D finite element simulation[J].Materials Science and Engineering A,2010,527(4-5):1230-1235.
• [20]赵小莲,赵宁宁,陈娜.大尺寸纯铝棒等径角多道次挤压数值模拟[J].轻合金加工技术,2013,41(3):49-53.ZHAO Xiao-lian,ZHAO Ning-ning,CHEN Na.Numerical simulation of large-sized pure aluminum rod produced by ECAP with multi-passes[J].Light Alloy Fabrication Technology,2013,41(3):49-53.
• [21]Iwahashi Y,Wang J,Horita Z,et al.Principle of equalchannel angular ressing for the processing of ultra-fine grained materials[J],Scripta Materialia,1996,35(02):143-146.
• [22]Basavaraj V P,Chakkingal U,Kumar T S P.Study of channel angle influence on mate-rial flow and strain inhomogeneity in equal channel angular pressing using 3D finite element simulation[J].Journal of Materials Processing Technology,2009,209(1):89-95.
• [23]白朴存,聂浩,田春雨,等.等通道转角多道次挤压有限元模拟[J].锻压技术,2007,32(5):125-128.BAI Pu-cun,NIE Hao,TIAN Chun-yu,et al.Finite element simulation of multiple passes equal channel angular pressing process[J].Forging&Stamping Technology,2007,32(5):125-128.
• [24]Xue Q,Beyerlein I J,Alexander D J,et al.Mechanisms for initial grain refinement in OFHC copper during equal channel angular pressing[J].Acta Materialia,2007,55(2):655-668.

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