材料科学
微观结构
合金
粉末冶金
极限抗拉强度
挤压
成核
冶金
电阻率和电导率
退火(玻璃)
相(物质)
复合材料
扫描电子显微镜
化学
有机化学
工程类
电气工程
作者
Xiaobo Yuan,Ping Zhang,Jianxiang Wang,Bingchu Yang,Yunping Li
出处
期刊:Materials
[MDPI AG]
日期:2023-07-23
卷期号:16 (14): 5180-5180
被引量:3
摘要
To study the effects of Fe content and cold drawing strain on the microstructure and properties, Cu-Fe alloys were prepared via powder metallurgy and hot extrusion. Scanning electron microscopy was applied to observe the Fe phase, and the ultimate tensile strength was investigated using a universal material testing machine. Alloying with an Fe content below 10 wt.% formed a spherically dispersed Fe phase via the conventional nucleation and growth mechanism, whereas a higher Fe content formed a water-droplet-like Fe phase via the spinodal decomposition mechanism in the as-extruded Cu-Fe alloy. Further cold drawing induced the fiber structure of the Fe phase (fiber strengthening), which could not be destroyed by subsequent annealing. As the Fe content increased, the strength increased but the electrical conductivity decreased; as the cold drawing strain increased, both the strength and the electrical conductivity roughly increased, but the elongation roughly decreased. After thermal-mechanical processing, the electrical conductivity and strength of the Cu-40Fe alloy could reach 51% IACS and 1.14 GPa, respectively. This study can provide insight into the design of high-performance Cu-Fe alloys by tailoring the size and morphology of the Fe phase.
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