Grain design in ultra-fine Al wire with remarkable combination of strength and conductivity: Ultra-fine-long grains with super strong 〈111〉 texture
Grain design in ultra-fine Al wire with remarkable combination of strength and conductivity: Ultra-fine-long grains with super strong 〈111〉 texture
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DOI：
10.1016/j.scriptamat.2023.115746
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发表时间：
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影响因子：
6
通讯作者：
S. Wang;J. Hou;Z.J. Zhang;B. Gong;Z. Qu;H. Wang;X.H. Zhou;H.C. Jiang;Q. Wang;X.W. Li;Z.F. Zhang
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文献类型：
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作者：
S. Wang;J. Hou;Z.J. Zhang;B. Gong;Z. Qu;H. Wang;X.H. Zhou;H.C. Jiang;Q. Wang;X.W. Li;Z.F. Zhang
强度和导电率（EC）之间的权衡关系限制了铝线在汽车电子线束中的进一步应用。本工作通过冷拔→中间退火→冷拔工艺成功制备出直径0.2毫米左右的超细纯铝丝（UFPAW）。定量结果表明，径向截面的超细晶粒与超强的<111>织构一起可以提供显着的晶界强化和织构强化，从而使UFPAW具有超高强度（228.3MPa）。此外，由于横向晶界的减少，轴向长晶粒可以减弱电子散射，从而导致UFPAW具有较高的EC（63.14％IACS）。因此，具有超强<111>织构的超细长晶粒被证明是UFPAW实现超高强度和高EC的主导因素。
The trade-off relation between the strength and electrical conductivity (EC) limits the further application of Al wires in the automotive electronic wiring harnesses. In this work, an ultra-fine pure Al wire (UFPAW) with a diameter of around 0.2 mm was successfully prepared by the process of cold drawing → intermediate annealing → cold drawing. It was quantitatively revealed that the ultra-fine grains in the radial section together with the super strong <111> texture could provide remarkable grain boundary strengthening and texture strengthening, resulting in an ultra-high strength of the UFPAW (228.3 MPa). Besides, the axial long grains could weaken the electron scattering due to the reduction of transverse grain boundaries, leading to a high EC of the UFPAW (63.14 %IACS). Consequently, the ultra-fine-long grains with super strong <111> texture were proved to be the dominant factors in achieving ultra-high strength and high EC of the UFPAW.