电化学镀铜制备Al-0.5 wt.% Fe合金线材的组织与性能

Q1 Engineering
A.E. Medvedev , K.E. Kiryanova , E.B. Medvedev , M.V. Gorbatkov , M.M. Motkov
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引用次数: 0

摘要

本研究考察了通过在电磁结晶器(EMC)中铸造获得的Al-0.5Fe合金芯包铜导线的显微组织、力学和电学性能。采用电化学沉积的方法制备了厚度为90±10 μm的外铜层。铝线的铜包层导致(在不损失强度和导电性的情况下)延展性下降到小于2%的值,这是商业用铝合金的最低推荐延伸率。这种延性的下降也导致断裂类型向脆性断裂类型的转变。脆性断裂的原因是铜在铝合金上电化学沉积工艺过程中所需要的过渡镍层的存在。在300℃下退火1 h后,双金属丝的延展性恢复到原来的水平(冷拔Al-0.5Fe合金丝为4.3%),极限抗拉强度略有下降至184 MPa,比电导率增加至60.9%IACS,断裂行为改变为延展性。该方法有望制造具有厚度和化学成分可控的薄铜层的双金属铝线,以产生可实现趋肤效应的导电元件。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Microstructure and properties of the Al-0.5 wt.% Fe alloy wire, copper-clad by electrochemical deposition
This study examines the microstructure, mechanical and electrical properties of the copper-clad wires with a core of Al-0.5Fe alloy, obtained by casting into an electromagnetic crystallizer (EMC). The outer copper layer with a thickness of 90 ± 10 μm was applied via electrochemical deposition. Copper cladding of the aluminum wire leads to (without loss of strength and electrical conductivity) a decrease in the ductility to the value less than 2% which is the minimal recommended level of the elongation to failure for the commercially used aluminium alloys. Such drop in ductility also results in the shift of the fracture type to a brittle one. The cause of brittle fracture is the presence of a transition nickel layer required by the technological process of the electrochemical deposition of copper onto aluminium alloy. Annealing at 300 °C for 1 h leads to recovery of the ductility to the original level (4.3% for the cold-drawn Al-0.5Fe alloy wires) with a slight decrease in the ultimate tensile strength to 184 MPa and an increase in the specific electrical conductivity of the bimetallic wire to 60.9%IACS, as well as a change in fracture behavior to ductile. This method is promising for creating the bimetallic aluminum wires with a thin copper layer of controlled thickness and chemical composition to produce conductive elements in which the skin effect could be realized.
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来源期刊
International Journal of Lightweight Materials and Manufacture
International Journal of Lightweight Materials and Manufacture Engineering-Industrial and Manufacturing Engineering
CiteScore
9.90
自引率
0.00%
发文量
52
审稿时长
48 days
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