机电工程技术2024，Vol.53Issue(5)：142-145,4.DOI:10.3969/j.issn.1009-9492.2024.05.031
超声振动对Al-Zn-Mg-Cu合金时效组织和性能的影响
Effect of Ultrasonic Vibration on Aging Microstructure and Properties of Al-Zn-Mg-Cu Aluminum Alloy
摘要
Abstract
Ultrasonic vibration aging of Al-Zn-Mg-Cu alloy is performed by means of tensile test at room temperature,microhardness test,conductivity test,metallographic microscope and scanning electron microanalysis(SEM)based on self-made ultrasonic vibration device.The effects of ultrasonic vibration aging time and aging regime on the microstructure and properties of Al-Zn-Mg-Cu alloy are studied by single factor experimental design.The results show that the growth of precipitated phase is promoted by ultrasonic vibration.With the extension of ultrasonic vibration aging time,the conductivity of the alloy increases gradually,the hardness and tensile strength decrease gradually,and the elongation increases slightly.Metallographic analysis shows that the shock stress of ultrasonic vibration cuts the coarse second phase particles,making the black particles smaller and finally dissolving or disappearing.The ultrasonic vibration has no obvious effect on the grain size,shape and quantity.At the same time,the excitation stress makes the dislocation plug open,reduces the dislocation density and reduces the residual stress.The tensile fracture is observed by SEM microscope.It is found that with the extension of ultrasonic vibration time,the characteristics of ductile fracture are more obvious,the number of dimples increase significantly,the size and depth of dimples increase.关键词
超声振动/Al-Zn-Mg-Cu合金/双级时效Key words
ultrasonic vibration/Al-Zn-Mg-Cu alloy/two-stage aging分类
矿业与冶金引用本文复制引用
何宇鹏,林亮华,李赞..超声振动对Al-Zn-Mg-Cu合金时效组织和性能的影响[J].机电工程技术,2024,53(5):142-145,4.基金项目
江西省自然科学基金项目(20202BAB214005) （20202BAB214005）
