Effect of intermittent non-isothermal aging on the microstructure and properties of Al-Zn-Mg-Cu alloy

被引：1
作者：
Wang, Yuezhu [1 ]
Shi, Ling [1 ]
Su, Ruiming [1 ]
Liu, Tongyu [1 ]
Li, Guanglong [1 ]
机构：
[1] Shenyang Univ Technol, Sch Mat Sci & Engn, Shenyang 110870, Liaoning, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2024年 / 328卷
关键词：
Al-Zn-Mg-Cu alloy; Non-isothermal aging; Intermittent; Corrosion resistance; Microstructure morphology; CORROSION BEHAVIOR; EXFOLIATION CORROSION; STRENGTH; RESISTANCE; EVOLUTION;
D O I：
10.1016/j.matchemphys.2024.129946
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The proposition of an intermittent non-isothermal aging (IM-NIA) is an innovative approach to address the challenge of balancing the mechanical properties and corrosion resistance of Al-Zn-Mg-Cu alloys. The effects of IM-NIA on the hardness, corrosion resistance and microstructure morphology of Al-Zn-Mg-Cu alloys were investigated by hardness test, intergranular corrosion test (IGC), exfoliation corrosion test (EXCO), electrochemical corrosion test and combined with transmission electron microscopy (TEM) observation. The results showed that the hardness of the alloy was the highest at 186HV after intermittent post-tempering to 180 degrees C (IMH180). The intergranular corrosion depth is the smallest, the corrosion rate is the slowest, and the exfoliation corrosion rating is EA. In addition, the alloy matrix precipitated phase has the smallest average diameter, the highest volume fraction, the strongest ability to repair the passivation film, and the strongest resistance to Cl- erosion; At the same time, the grain boundary precipitation phase is intermittent and multilinear parallel distribution, PFZ is the widest, hindering the anodic corrosion channel, slow corrosion progress and improve corrosion resistance.
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页数：10
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