Precipitation behavior and precipitates characterization of Al-Zn-Mg-Cu alloy during the non-isothermal aging process

被引：0
|
作者：
Chen, Zhongwei [1 ]
Ren, Congcong [2 ]
Le, Wei [1 ]
An, Bo [1 ]
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China
[2] China Acad Engn Phys, Inst Mat, Mianyang 621908, Peoples R China
来源：
VACUUM | 2025年 / 233卷
关键词：
Al-Zn-Mg-Cu alloy; Non-isothermal aging (NIA); Transmission electron microscopy (TEM); eta.precipitates; STRESS-CORROSION CRACKING; RESOLUTION ELECTRON-MICROSCOPY; SERIES ALUMINUM-ALLOYS; MECHANICAL-PROPERTIES; MICROSTRUCTURE EVOLUTION; ALZNMG(CU) ALLOYS; RESISTANCE; SCENARIOS; STRENGTH;
D O I：
10.1016/j.vacuum.2024.113946
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, the precipitation behavior and precipitates characterization of Al-Zn-Mg-Cu alloy during nonisothermal aging (NIA) process were investigated by transmission electron microscopy (TEM) and microhardness testing. The existence state of the overall precipitates in the alloy has been studied, and the evolution sequence can be expressed as: SSS -> GP II zones -> GPII zones and eta ' precipitates -> eta precipitates -> eta precipitates and GPII zones -> eta precipitates. The results show that the eta series precipitates can provide support for the hardening of Al-Zn-Mg-Cu alloy, especially the GPII zones and eta ' precipitates. Besides, some interesting phenomena were observed and explained, and a new type of eta precipitate (eta 14) was characterized.
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页数：9
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