Development of nano-scale precipitation in QCr0.5 copper alloy during aging at different temperatures

被引：0

作者：

Zhang, Ling-Feng ^{[1
]}

Xiong, Yi ^{[1
]}

Li, Yan ^{[1
]}

Zhang, Yi ^{[1
]}

Liu, Yu-Liang ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China

来源：

Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | 2012年 / 33卷 / 06期

关键词：

Precipitation; (chemical); -; Nanotechnology; Precipitates;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Precipitate evolution of precipitate in a QCr0.5 copper alloy during aging at different temperatures was analyzed. The results show that no significant precipitates are observed and the solid-solutioned and deformed microstructure is maintained for the QCr0.5 copper alloy after aging at 400°C, GP zones are formed for the alloy after aging at 425°C for 2 h, coherent nano precipitate phase is detected in the alloy aged at 450°C, and coherent nanoparticles of precipitate phase with size of 4-6 nm and uniform distribution are found in the aged alloy at 475°C. The strength and electrical conductivity of the material aged at 475°C exhibit a higher level. When the aging temperature increases to 500°C, non-coherent precipitate phase forms and with further increasing of the temperature the precipitate phase begins to grow, while the hardness of the alloy decreases markedly.

引用

页码：47 / 50