材料科学
合金
极限抗拉强度
降水
相(物质)
微观结构
电阻率和电导率
老化
电导率
透射电子显微镜
冶金
位错
扫描电子显微镜
复合材料
分析化学(期刊)
化学
纳米技术
物理化学
色谱法
遗传学
生物
有机化学
气象学
工程类
物理
电气工程
作者
Yuxia Ma,Huiqin Chen,Li Hui,Shue Dang
出处
期刊:Materials
[MDPI AG]
日期:2022-10-29
卷期号:15 (21): 7605-7605
被引量:4
摘要
The Cu-1.0% Cr-0.1% Zr alloy in a solid solution state was investigated by ageing treatments at different temperatures and holding times. The structure and performance were characterized and tested by using X-ray diffraction (XRD), a transmission electron microscope (TEM), a universal material testing machine, and an eddy conductivity detector. The influence laws of ageing temperature and the holding time on the structures and properties of the Cu-Cr-Zr alloy were analyzed. Results demonstrated that, with the increase in ageing temperature and holding time, the percentage and size of the Cr precipitated phase increased, and the dislocation density decreased. The tensile strength first increased to the peak value and then decreased. The electrical conductivity increased and the amplitude decreased. The tensile strength of the alloy reached the peak (359 ± 2 MPa) after ageing at 450 °C for 60 min, and the electrical conductivity was 91.9 ± 0.7% IACS. In addition, in the ageing precipitation process, the chromium precipitated phase had face-centered cubic structure (FCC) and body-centered cubic structure (BCC) structures, and the FCC Cr phase can be transformed into a BCC Cr phase. FCC Cr, BCC Cr, and Cu3Zr precipitation phases maintained different orientation relationships with the Cu substrate.
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