Effects of ultrasonic vibration on the microstructure and corrosion properties of the 7046 Al alloy

被引：5
作者：
Qiu, Yang [1 ,2 ,3 ,4 ]
Li, Xintao [1 ,2 ,3 ,4 ]
Huang, Huilan [1 ,2 ,3 ,4 ]
Liu, Mingyang [1 ,2 ,3 ,4 ]
Xia, Peng [1 ,2 ]
Luo, Yajun [5 ]
Zhou, Nan [1 ,2 ]
机构：
[1] Guangdong Acad Sci, Inst New Mat, Guangzhou 510630, Peoples R China
[2] Guangdong Prov Key Lab Metal Toughening Technol &, Guangzhou 510630, Peoples R China
[3] Jiangxi Universal New Mat Technol Co Ltd, Shangrao 334400, Peoples R China
[4] Jiangxi Universal New Mat Lightweight Ind Technol, Shangrao 334400, Peoples R China
[5] Hunan Inst Engn, Xiangtan 411104, Peoples R China
来源：
VACUUM | 2022年 / 205卷
关键词：
Ultrasonic vibration; Corrosion properties; Microstructure; Grain boundary precipitates; 7046 Al alloy; PRECIPITATE-FREE ZONES; MECHANICAL-PROPERTIES; GRAIN-REFINEMENT; ALUMINUM-ALLOYS; AZ91; ALLOY; BEHAVIOR; SOLIDIFICATION; RESISTANCE; STRENGTH; PHASES;
D O I：
10.1016/j.vacuum.2022.111465
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Low-Cu Al-Zn-Mg series 7046 alloys were prepared using ultrasonic vibration casting and conventional casting methods. The grain sizes, grain boundary precipitates, and precipitate-free zones of the alloys were studied, and the polarization curves and electrochemical impedance spectra were measured to reveal the effects of ultrasonic vibration on the alloy microstructure and corrosion properties. The results showed that ultrasonic vibration refines and homogenizes the microstructure, promotes the discontinuous distribution of grain boundary pre-cipitates, and increases the precipitate-free zone width. Consequently, the corrosion resistance is enhanced, and the corrosion rate is decreased.
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页数：5
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