2GPa高压处理对铜铝合金显微组织和性能的影响

Effects of High Pressure Treatment on Microstructure and Properties of Cu-Al Alloy at 2 GPa

摘要: 在2GPa高压下将铜铝合金加热到750 ℃后保温10 min, 借助光学显微镜和纳米压痕仪研究了高压处理对铜铝合金显微组织、力学性能及摩擦因数的影响。结果表明: 经2 GPa高压处理后, 铜铝合金的组织得到细化, 分布更加均匀; 其纳米压痕硬度、弹性模量、硬弹比和弹性回复系数分别为3.87 GPa, 13.46 GPa, 0.034和83.68%, 较处理前分别提高了8.71%, 2.75%, 6.25%和35.34%, 但摩擦因数却稍有降低。

Abstract: Cu-Al alloy was treated at 2 GPa and 750 ℃ for 10 minutes, and effects of high pressure treatment on the microstructure, mechanical properties and friction coefficient of Cu-Al alloy were investigated by metallurgical microscope and nanoindenter. The results show that after high pressure treatment at 2 GPa, the microstructure of Cu-Al alloy was refined, and distribution become more uniform. Its nano-hardness, elastic modulus, ratio of hardness and elastic modulus, elastic recovery rate were 3.87 GPa, 113.46 GPa, 0.034 and 83.68%, which were 8.71%, 2.75%, 6.25% and 35.34% higher than those of Cu-Al alloy before 2 GPa pressure treatment, respectively, but friction coefficient slightly decreased.