Effect of Ni and Si on microstructure and mechanical properties of Cu-Fe alloy

被引：3

作者：

Yue S.-P. ^{[1
]}

Jie J.-C. ^{[1
]}

Qu J.-P. ^{[1
]}

Li T.-J. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Dalian University of Technology, Dalian

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 06期

关键词：

Interface energy; Microstructure; Morphology transformation; Strengthening mechanism;

D O I：

10.11817/j.ysxb.1004.0609.2021-39798

中图分类号：

学科分类号：

摘要：

The effects of Ni and Si elements on the microstructure and mechanical properties of Cu-20Fe (mass fraction, %) alloy were studied by optical microscope, electron probe analysis, transmission electron microscope, X-ray diffractometer and tensile experiment. The results show that the addition of Ni and Si elements leads to obvious coarsening behavior of the α-Fe dendrites in the Cu-20Fe alloy. In addition, due to the addition of alloying elements, the interface energy between γ-Fe and the copper-rich precipitation phase is reduced, so that the morphology of the copper-rich precipitation phase has undergone a significant change, that is, it changes from a nearly spherical shape to a cube. Compared with the binary alloy without adding alloying elements, the strength and plasticity of the multi-component alloy are improved after the addition of alloying elements. The yield strength and elongation of the multi-component alloy are 304MPa and 16%, respectively. Through theoretical calculation and experimental verification, it is determined that the main strengthening mechanism of the alloy is solid solution strengthening and precipitation strengthening. © 2021, Science Press. All right reserved.

引用

页码：1485 / 1493

页数：8

共 23 条

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