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Microstructural evolution and properties of Cu–20 wt% Ag alloy wire by multi-pass continuous drawing
Nanotechnology Reviews ( IF 7.4 ) Pub Date : 2020-12-31 , DOI: 10.1515/ntrev-2020-0108
Chu Cheng 1, 2, 3 , Kexing Song 1, 2, 3 , Xujun Mi 4 , Baoan Wu 5 , Zhu Xiao 6 , Haofeng Xie 4 , Yanjun Zhou 1, 2, 3 , Xiuhua Guo 1, 2, 3 , Haitao Liu 1, 2, 3 , Dingbiao Chen 7 , Xiaoyu Shen 8 , Yong Ding 8
Affiliation  

Abstract The Cu–20 wt% Ag alloy wire rod was prepared using three-chamber vacuum cold mold vertical continuous up-casting followed by multi-pass continuous drawing. The evolution of microstructure, mechanical property, and electrical property of the Cu–20 wt% Ag alloy wire during multi-pass continuous drawing was studied. After multi-pass continuous drawing, the continuous network eutectic structure in the longitudinal section of the as-casted rod was gradually drawn into long fibers that approximately parallel to the axial direction, while the space of the continuous network eutectic structure in the transverse section is getting smaller and smaller. Both the preferred orientation of copper and silver grains are (1,1,1). With the increase of drawing strain (η), the tensile strength of Cu–20 wt% Ag alloy wire gradually increases while the elongation gradually decreases. When the diameter is drawn to 0.02 mm (η = 11.94), the tensile strength of the alloy is 1,682 MPa and elongation is 2.0%. The relationship between tensile strength, elongation, and diameter conforms to Allometric and Boltzmann functions, respectively.

中文翻译:

多道次连续拉拔Cu-20 wt% Ag合金线材的显微组织演变及性能

摘要 采用三室真空冷模立式连续向上浇铸和多道次连续拉拔制备Cu-20 wt% Ag合金线材。研究了多道次连续拉拔过程中Cu-20 wt% Ag合金线材的微观结构、机械性能和电性能的演变。经过多道次连续拉拔后,铸态棒材纵截面连续网状共晶组织逐渐被拉制成与轴向近似平行的长纤维,而连续网状共晶组织在横截面的空间为越来越小。铜和银颗粒的优选取向都是(1,1,1)。随着拉伸应变(η)的增加,Cu–20 wt% Ag 合金丝的抗拉强度逐渐增加,而伸长率逐渐降低。当直径拉至 0.02 mm (η = 11.94) 时,合金的抗拉强度为 1,682 MPa,伸长率为 2.0%。拉伸强度、伸长率和直径之间的关系分别符合 Allometric 和 Boltzmann 函数。
更新日期:2020-12-31
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