摘要
采用扫描电镜、万能电子试验机和HVS-5Z/LCD维氏硬度计观察与测试变质处理Zn-6Al-3Mg合金的凝固组织与力学性能,研究Al-2Ti变质剂加入量和变质温度对合金组织和力学性能的影响。研究结果表明:当变质温度为500℃,Al-2Ti变质剂加入量为0.5%(质量分数)时,Zn-6Al-3Mg合金组织中初晶Al-fcc相呈细小颗粒状,其体积分数最小,初晶MgZn_2相消失,Zn/Al二元和Zn/Al/MgZn_2三元共晶体的体积分数最多;当变质剂加入量为0.5%,变质温度为500℃时,Zn-6Al-3Mg合金的抗拉强度和伸长率最高,合金的综合力学性能最好。
The microstructures of Zn-6A1-3Mg alloy modified with A1-2Ti were observed using scanning electron microscopy and its mechanical properties were measured using electron universal testing machine and HVS-5Z/LCD Vickers hardness tester. The effect of adding amount of A1-2Ti and modification temperature on microstructures and mechanical properties of Zn-6A1-3Mg alloy was investigated. The results show that primary Al-fcc exists in the form of fine particles and its volume fraction is the least when Zn-6A1-3Mg alloy is modified with 0.5%A1-2Ti at 500 ℃. At the same time, the primary MgZn2 phase disappears and the volume fraction of binary Zn/A1 and ternary Zn/A1/MgZn2 is the most. When the adding amount of A1-2Ti is 0.5%, the Zn-6A1-3Mg alloy modified at 500 ℃ possesses the highest tensile strength and elongation. At this condition, the comprehensive mechanical properties of the alloy are the best.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2017年第5期1162-1167,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51271041
51271040)
江苏高校优势学科建设工程项目和常州市工业支撑项目(CE20130085)~~
