The precipitation behavior of natural aging for Al-Cu-Li alloy after homogenization

被引：2
作者：
Liu, Fuyuan [1 ]
Wang, Guantao [1 ]
Guo, Enyu [1 ,2 ]
Zhang, Zhirou [1 ]
Chen, Zongning [1 ,2 ]
Kang, Huijun [1 ,2 ]
Xu, Yanjin [3 ]
Wang, Tongmin [1 ,2 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Solidificat Control & Digital Preparat Tec, Dalian 116024, Peoples R China
[2] Dalian Univ Technol, Ningbo Inst, Ningbo 315000, Peoples R China
[3] AVIC Mfg Technol Inst, Beijing 100024, Peoples R China
来源：
VACUUM | 2025年 / 232卷
关键词：
Al-Li alloys; Natural aging; Precipitate; Mechanical properties; MICROSTRUCTURE;
D O I：
10.1016/j.vacuum.2024.113878
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of natural aging (NA) on microstructure and mechanical properties of as-homogenized Al-4.1Cu1.3Li-0.4Mg-0.4Ag-0.3Mn-0.5Zn-0.1Zr alloy are investigated in this work. The results show that the alloy exhibits a strong NA response attributed to a plethora of GP-Li zones and delta ' precipitated during the initial 3 days which provides nucleation sites for the T1 phase. After 15 days, the mechanical properties dramatically enhance due to the precipitation of the saturated GP-Li zones, delta ', and T1 phases. The yield strength, ultimate tensile strength, and fracture elongation reach 316 MPa, 469 MPa, and 14 % after NA for 15 days, respectively.
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页数：5
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