纯铝等径角挤扭新工艺数值模拟及实验研究

中国机械工程 ›› 2010, Vol. 21 ›› Issue (12): 1485-1489.

纯铝等径角挤扭新工艺数值模拟及实验研究

薛克敏;吴战立;李萍;王晓溪;贾建磊

合肥工业大学,合肥,230009

出版日期:2010-06-25 发布日期:2010-07-01
基金资助:
国家自然科学基金资助项目(50875072)；霍英东教育基金会资助项目(121053)；安徽省优秀青年科技基金资助项目(10040606Y21)
National Natural Science Foundation of China（No. 50875072）;
Anhui Provincial Science and Technology Foundation for Distinguished Young Scholars( No. 10040606Y21)

Simulation and Experimental Research on a New Technique Named Equal Channel Angular Extrusion and Twist Prepared by Pure Aluminum 

Xue Kemin;Wu Zhanli;Li Ping;Wang Xiaoxi;Jia Jianlei

Hefei University of Technology,Hefei,230009

Online:2010-06-25 Published:2010-07-01
Supported by:

National Natural Science Foundation of China（No. 50875072）;
Anhui Provincial Science and Technology Foundation for Distinguished Young Scholars( No. 10040606Y21)

摘要/Abstract

摘要：

为了改进等径角挤压法（ECAE）的不足,结合扭挤（TE）工艺的特点,提出了等径角挤扭（ECAE-T）新工艺。采用有限元模拟软件DEFORM-3D对上述三种工艺的变形特征进行模拟研究,重点分析了ECAE-T工艺对制件应变应力大小和分布的影响。模拟结果显示：与ECAE和TE相比,ECAE-T工艺存在两个大塑性变形区,能累积更大的剪切塑性变形量。采用自行设计的模具,在室温下进行了纯铝ECAE和ECAE-T实验研究,实验结果表明：模拟过程与实验基本一致,与ECAE相比,ECAE-T工艺一道次后的组织更加狭长、细小。由模拟结果和实验结果可知,ECAE-T工艺是更加优异的大塑性变形法。

关键词:

大塑性变形, 等径角挤压, 等径角挤扭, 有限元模拟, 显微组织

Abstract:

In order to improve the insufficiency of ECAE,another super plastic deformation method(SPD)—TE was combined to create a new technique process—ECAE-T,which was first proposed. The finite element simulation about pure aluminum deformation during these three techniques was carried out by simulation software DEFORM-3D at room temperature. The distribution of effective strain and stress on the sample during ECAE-T were mainly obtained. The results show that there are two main deformation zone in the sample during ECAE-T and the effective strain is higher than ECAE and TE. The experiments about pure aluminum at room temperature during ECAE and ECAE-T were carried out using our own die. The results by simulation and experiments are extraordinary consistent. The optical organization after ECAE-T one pass is elongated much longer and smaller. The technique of ECAE-T is proved as a more excellent SPD method with the results of simulation and experiments. 

Key words: severe plastic deformation;ECAE(equal channel angular extrusion);ECAE-T(equal channel angular extrusion and twist);finite element simulation, microstructure

中图分类号:

TG376

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, 21(12): 1485-1489.

XUE Ke-Min, TUN Zhan-Li, LI Ping, WANG Xiao-Xi, GU Jian-Lei.

Simulation and Experimental Research on a New Technique Named Equal Channel Angular Extrusion and Twist Prepared by Pure Aluminum 

[J]. China Mechanical Engineering, 2010, 21(12): 1485-1489.

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http://www.cmemo.org.cn/CN/Y2010/V21/I12/1485

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