材料科学
微观结构
金属间化合物
合金
共晶体系
挤压
退火(玻璃)
冶金
电阻率和电导率
沉淀硬化
铝
电导率
硬化(计算)
6111铝合金
复合材料
电气工程
工程类
物理化学
化学
图层(电子)
作者
Hyo-Sang Yoo,Yong-Ho Kim,Kyu-Seok Lee,Sungho Lee,Seong-Hee Lee,Hyeon-Taek Son
标识
DOI:10.1166/jnn.2020.17275
摘要
In this study, we investigate the microstructure and mechanical properties of as-extruded Al-1.0RE alloys. The molten Aluminum alloy was maintained at 800 °C and then poured into a mould at 200 °C. Aluminum alloys were hot-extruded into a rod measuring 12 mm thick with a reduction ratio of 38:1. The microstructure and electric conductivity properties of as-extruded Al-1.0RE alloy under different annealing processes were investigated and compared. After extrusion, the intermetallic compound having a needle shape in the cast state was finely decomposed based on the direction of extrusion. Significant changes in the microstructure were detected after annealing at 500 °C with fragmentation and sphering of eutectic particles. The annealing temperature of Al-1.0RE alloy increased proportionally to the electrical conductivity. The formation of Al-RE intermetallic compounds increases the electrical conductivity and improves the mechanical properties of the alloy through precipitation hardening.
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