Enhancing tensile strength of Cu by introducing gradient microstructures via a simple torsion deformation
Enhancing tensile strength of Cu by introducing gradient microstructures via a simple torsion deformation
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通过简单的扭转变形引入梯度微结构来提高铜的拉伸强度
DOI：
10.1016/j.matdes.2015.10.157
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发表时间：
2016-01-15
影响因子：
8.4
通讯作者：
Liu, Tingting
中科院分区：
文献类型：
--
作者：
Guo, Ning;Song, Bo;Liu, Tingting
研究了预扭转变形对挤压态圆柱形铜杆显微组织和抗拉强度的影响。结果表明，预扭转能显著提高挤压态铜杆的拉伸屈服强度，且不改变挤压态铜杆的形状和尺寸。拉伸屈服强度的提高主要是由于预扭转纯剪切变形在拉长的纤维晶粒中引入了梯度层状位错亚结构。(C)2015爱思唯尔有限公司版权所有。
The influences of pre-torsion deformation on microstructure and tensile strength of commercial as-extruded Cu rods with cylindrical shape have been investigated in this study by twisting the rods to different numbers of revolutions. The results indicated that the pre-torsion can significantly enhance the tensile yield strength of the as-extruded Cu rods without changing their shape and size. The increase in tensile yield strength is mainly due to the gradient lamellar dislocation substructures (LDS) embedded in elongated fiber grains introduced by pre-torsion pure shear deformation. (C) 2015 Elsevier Ltd. All rights reserved.