等通道转角挤压工艺(Equal Channel Angular Pressing,ECAP)是通过剧烈塑性变形改变微观组织结构生产超细晶粒材料的材料加工方法,工件变形的均匀性一直是ECAP 工艺过程中影响材料性能的主要原因之一.采用空间转换法实现了AZ31镁合金多道次ECAP挤压过程中有限元分析相关场量的准确传递,完成了四种不同挤压路径ECAP多道次挤压工艺的有限元模拟,获得了相应挤压件累积等效应变的分布规律.研究确定了经过四道次ECAP挤压以后等效应变累积最为均匀的挤压路径.通过微观组织观察和室温拉伸力学性能实验探讨了不同路径多道次ECAP挤压AZ31镁合金的组织性能变化规律.分析结果表明通过合适的变形路径可以获得细小而均匀的微观组织,当材料的应变累积均匀时,其力学性能也较好.
参考文献
[1] | Hou LF;Wei YH;Liu BS;Xu BS .High energy impact techniques application for surface grain refinement in AZ91D magnesium alloy[J].Journal of Materials Science,2008(13):4658-4665. |
[2] | A.A. Luo;R.K. Mishra;B.R. Powell .Magnesium Alloy Development for Automotive Applications[J].Materials Science Forum,2012(Pt.1):69-82. |
[3] | 张丁非,戴庆伟,胡耀波,兰伟,方霖.镁合金板材轧制成型的研究进展[J].材料工程,2009(10):85-90. |
[4] | H.Gleiter .Nanostructured materials: basic concepts and microstructure[J].Acta materialia,2000(1):1-29. |
[5] | Roberto B. Figueiredo;Terence G. Langdon .Strategies for achieving high strain rate superplasticity in magnesium alloys processed by equal-channel angular pressing[J].Scripta materialia,2009(1):84-87. |
[6] | K. Matsubara;Y. Miyahara;Z. Horita .Developing superplasticity in a magnesium alloy through a combination of extrusion and ECAP[J].Acta materialia,2003(11):3073-3084. |
[7] | 何运斌,潘清林,刘晓艳,李文斌.ECAP法制备细晶ZK60镁合金的微观组织与力学性能[J].材料工程,2011(06):32-38. |
[8] | Irene J. Beyerlein;Laszlo S. Toth .Texture evolution in equal-channel angular extrusion[J].Progress in materials science,2009(4):427-510. |
[9] | 靳丽,林栋樑,毛大立,曾小勤,丁文江.两步等通道角挤压AZ31镁合金的微观组织和力学性能[J].上海交通大学学报,2005(11):1775-1778. |
[10] | Y. W. Tham;M. W. Fu;H. H. Hng;M. S. Yong;K. B. Lim .Study of deformation homogeneity in the multi-pass equal channel angular extrusion process[J].Journal of Materials Processing Technology,2007(0):121-127. |
[11] | E. Cerri;P. P. De Marco;P. Leo .FEM and metallurgical analysis of modified 6082 aluminium alloys processed by multipass ECAP: Influence of material properties and different process settings on induced plastic strain[J].Journal of Materials Processing Technology,2009(3):1550-1564. |
[12] | Shubo Xu;Guoqun Zhao;Yiguo Luan .Numerical studies on processing routes and deformation mechanism of multi-pass equal channel angular pressing processes[J].Journal of Materials Processing Technology,2006(1/3):251-259. |
[13] | V. Patil Basavaraj;Uday Chakkingal;T. S. Prasanna Kumar .Study of channel angle influence on material flow and strain inhomogeneity in equal channel angular pressing using 3D finite element simulation[J].Journal of Materials Processing Technology,2009(1):89-95. |
[14] | W.J. Kim;S.I. Hong;Y.S. Kim .Texture development and its effect on mechanical properties of an AZ61 Mg alloy fabricated by equal channel angular pressing[J].Acta materialia,2003(11):3293-3307. |
[15] | 严凯,孙扬善,白晶,薛烽.转模等通道转角挤压路径对AZ31镁合金组织和力学性能的影响[J].金属学报,2010(01):27-33. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%