Effect of Transverse Grain Boundary on Microstructure, Texture and Mechanical Properties of Drawn Copper Wires-猫眼课题宝

横向晶界对拉制铜线显微组织、织构和力学性能的影响

DOI：

10.1016/j.jmst.2013.04.018

发表时间：

2014-02

期刊：

Journal of Materials Science and Technology

影响因子：

10.9

通讯作者：

中科院分区：

材料科学1区

文献类型：

作者：

Xiaoguang Ma;Wen Yan;Feng Xia;Xinhui Fan

研究了含有大量横向晶界的拉拔铜线的组织和织构，并对其力学性能进行了分析。结果表明，横向晶界加速了织构的演化，<111>随着应变的增加，纤维织构组分的体积分数迅速达到60%的饱和值。对于具有大量横向晶界的拉拔线材的组织，形成片层晶界的临界应变小于具有等轴晶或柱状晶（所有晶界平行于轴向）的线材的临界应变。由于横向晶界的存在加速了晶粒的细化，位错密度迅速增加，从而使拉拔钢丝具有更高的流变应力和加工硬化率。

In the present study, microstructure and texture of drawn copper wires with a large number of transverse grain boundaries have been characterized and their mechanical properties have been analyzed. The results show that the texture evolution is accelerated by transverse grain boundary and the saturation value 60% of volume fraction of <111> fiber texture component is reached rapidly with increasing strain. For the microstructure of drawn wires with a large number of transverse grain boundaries, the critical strain, where lamellar boundaries form, is less than that for wires with equiaxed grains or columnar grains (all grain boundaries parallel to axis direction). Since transverse grain boundary accelerates grain subdivision and dislocation density increases rapidly in drawn wires with a large number of transverse grain boundaries, there are a higher flow stress and a higher work hardening rate.