Long-term natural-aging-induced alleviation of attenuation of artificial-aging hardenability in an Al-5Mg-3Zn-1Cu (wt.%) alloy

被引：2
作者：
Lei, Chuan [1 ,2 ]
Zhang, Nannan [1 ,2 ]
Wang, Qudong [1 ,2 ]
Ebrahimi, Mahmoud [1 ,2 ]
Li, Dezhi [3 ]
Tang, Huaping [4 ]
Cai, Huisheng [1 ,2 ]
机构：
[1] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China
[3] Univ Warwick, Warwick Mfg Grp, Coventry CV4 7AL, England
[4] Ji Hua Lab, Foshan 528255, Guangdong, Peoples R China
来源：
MATERIALS LETTERS | 2023年 / 349卷
基金：
中国国家自然科学基金;
关键词：
Al-5Mg-3Zn-1Cu alloy; Aging response; Precipitation behavior; Strengthening mechanism; PRECIPITATION; MICROSTRUCTURE; BEHAVIOR;
D O I：
10.1016/j.matlet.2023.134819
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Effects of long-term natural aging (NA, 2400 h) on the artificial aging (AA) responses of Al-5Mg-3Zn-1Cu alloy at various temperatures (120-175 & DEG;C) were scrutinized. The results show that the hardenability of the alloy without NA (NA-free) deteriorates seriously at high AA temperatures (>150 & DEG;C). Such decay of AA hardenability is primarily induced by the larger and sparser intragranular precipitates and is also associated with the wide precipitation-free zone. Compared with NA-free alloy, long-term natural pre-aging improves the nucleation conditions in the early stage of subsequent AA, thus preventing these unfavorable microstructures and thereby mitigating the decay of hardening potential.
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页数：4
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