Journal of Materials Engineering and Performance ( IF 2.3 ) Pub Date : 2020-09-11 , DOI: 10.1007/s11665-020-05096-y Chen Li , Xiaojing Xu , Hanhui Chen , Vitus Tabie , Jie Cai , Yangguang Liu , Zheng Liu , Ching-Tun Peng
The effect of various Zn/Mg ratios on the microstructure and properties of cold extruded Al-xZn-2.4Mg-0.84Cu-0.2Zr-0.25Ti aluminum alloys was investigated. The microstructure analyses showed that as the Zn/Mg ratio increased from 3.46 to 3.84 and to 4.04, the recrystallization degree and the undissolved phase gradually increased. Moreover, with the increasing Zn/Mg ratio, the grain size of the alloy was refined, and the dislocation strengthening effect firstly increased and then decreased. The mechanical test results showed that as the Zn/Mg ratio increased from 3.46 to 3.84 and to 4.04, the tensile strength and hardness of the cold extruded Al-xZn-2.4Mg-0.84Cu-0.2Zr-0.25Ti alloy firstly increased and then decreased. The alloy with lower Zn/Mg ratio exhibited better capacitor characteristics, surface protection and corrosion resistance.
中文翻译:
Zn / Mg比对冷挤压Al-x Zn-2.4Mg-0.84Cu-0.2Zr-0.25Ti铝合金组织和性能的影响
研究了各种Zn / Mg比对冷挤压Al- x Zn-2.4Mg-0.84Cu-0.2Zr-0.25Ti铝合金的组织和性能的影响。显微组织分析表明,随着Zn / Mg比从3.46增加到3.84,再到4.04,重结晶度和不溶相逐渐增加。另外,随着Zn / Mg比的增加,合金的晶粒细化,位错强化效果先增大后减小。力学测试结果表明,随着Zn / Mg比从3.46增加到3.84和4.04,冷挤压Al- x的拉伸强度和硬度Zn-2.4Mg-0.84Cu-0.2Zr-0.25Ti合金先升高后降低。锌/镁比低的合金具有更好的电容器特性,表面保护和耐腐蚀性。