运用有限元模拟软件Msc.Marc对纯铜挤扭工艺变形特征进行研究,分析挤扭变形过程中应变分布以及应变分量的变化趋势.采用自行设计的挤扭模具,在室温下进行了纯铜的一道次挤扭试验.结果表明:变形可分为变形开始、完全充满、逐步挤出3个阶段;应变呈中心低、边缘高的分布;变形过程中正应变分量小,切应变分量较大,变形以剪切变形为主.挤扭过程中存在滑移和孪生两种变形方式;挤扭后试样的硬度得到显著提高,在横截面呈现边缘高、中心低的分布趋势.
参考文献
| [1] | Segal VM. .Severe plastic deformation: simple shear versus pure shear[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(1/2):331-344. |
| [2] | 李萍,黄科帅,薛克敏,周明智,韩国民.纯铝粉末多孔烧结材料等通道转角挤压[J].中国有色金属学报,2009(05):881-886. |
| [3] | Valiev RZ.;Alexandrov IV.;Islamgaliev RK. .Bulk nanostructured materials from severe plastic deformation [Review][J].Progress in materials science,2000(2):103-189. |
| [4] | 周明智,薛克敏,李萍.粉末多孔材料等径角挤压热力耦合有限元数值分析[J].中国有色金属学报,2006(09):1510-1516. |
| [5] | Beygelzimer, Y;Varyukhin, V;Synkov, S;Orlov, D .Useful properties of twist extrusion[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):14-17. |
| [6] | BEYGELZIMER Y;RESHETOV A;SYNKOV S .Kinematics of metal flow during twist extrusion investigated with a new experimental method[J].Journal of Materials Processing Technology,2008,209(07):3650-3656. |
| [7] | VARYUKHIN V;BEYGELZIMER Y;SYNKOV S;PROKOFEVA O KULAQIN R .Application of twist extrusion[J].Materials Science Forum,2006,503/504:335-340. |
| [8] | AKBARIMOUSAVI S A A .Influence of strain accumulation on microstructure of aluminum 1100 in the twist extrusion[J].International Journal of Modern Physics B-Cosmology and Nuclear Physics,2008,22(18/19):28582865. |
| [9] | Marco Berta;Dmitry Orlov;Philip B. Prangnell .Grain refinement response during twist extrusion of an Al-0.13% Mg alloy[J].Zeitschrift fur Metallkunde,2007(3):200-204. |
| [10] | AKBARIMOUSAVI S A A;SHAHAB A R;MASTOORI M .Computational study of Ti-6Al-.V flow behaviors during the twist extrusion process[J].Materials & Design,2008,29:1316-1329. |
| [11] | Dmitry Orlov;Yan Beygelzimer;Sergey Synkov;Viktor Varyukhin;Zenji Horita .Evolution of Microstructure and Hardness in Pure Al by Twist Extrusion[J].Materials transactions,2008(1):2-6. |
| [12] | 薛克敏,吴战立,李萍,王晓溪,贾建磊.纯铝等径角挤扭新工艺数值模拟及实验研究[J].中国机械工程,2010(12):1485-1489. |
| [13] | 薛克敏,王晓溪,李萍.超细晶材料制备新工艺--挤扭[J].塑性工程学报,2009(05):130-136. |
| [14] | BEYGELZIMER Y;VARYUKHIN V;SYNKOV S .Shears,vortice,and mixing during twist extrusion[J].International Journal of Material Forming,2008,1(z1):443-446. |
| [15] | 汪建敏,周孔亢,陆晋,许晓静,姜银方.层错能在剧烈剪切变形时对晶粒细化的影响[J].机械工程学报,2008(11):126-131. |
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