Effect of Aging Regime on Microstructure and Mechanical Properties of 2195 Al-Li Alloy

被引：0
|
作者：
Wang Yun [1 ]
Xu Yong [1 ,2 ]
Xia Liangliang [2 ]
Chen Shuaifeng [2 ]
Yin Kuo [1 ]
Men Xiangnan [3 ]
Deng Tao [3 ]
Shi-Hong Zhang [2 ]
机构：
[1] North China Univ Sci & Technol, Coll Met & Energy, Tangshan 063210, Peoples R China
[2] Chinese Acad Sci, Shi Changxu Innovat Ctr Adv Mat, Inst Met Res, Shenyang 110016, Peoples R China
[3] AVIC Chengdu Aircraft Ind Grp Co Ltd, Chengdu 610092, Peoples R China
来源：
RARE METAL MATERIALS AND ENGINEERING | 2022年 / 51卷 / 10期
关键词：
2195 Al-Li alloy; aging regime; precipitated phase; mechanical properties; GRAIN-BOUNDARY; ALUMINUM-ALLOY; ATOMIC-STRUCTURE; T-1; PHASE; PRECIPITATION; STRENGTH; QUANTIFICATION; DEFORMATION; FRACTURE; GROWTH;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of 2195 Al-Li alloy under different aging regimes were analyzed by hardness test, tensile test and transmission electron microscopy. The results show that the peak aging regimes of single stage aging are 160 degrees C/56 h and 190 degrees C/16 h, of which the peak tensile strength is 565 and 541 MPa, and elongation is 6.3% and 7.1%, respectively. The tensile strength and elongation of the alloy aged at 190 degrees C/4 h+160 degrees C/32 h are 588 MPa and 13.5%. Both of them are much better than those of the single-stage aging alloys. The elongated T-1 phase and compact region in the double stage aging alloy matrix play an important role in improving the strength. In addition, the narrow precipitation free zone along grain boundary and the cell structure inside grains are the main factors for the performance enhancement of plasticity. The double stage aging regime of 190 degrees C/4 h+160 degrees C/32 h can obtain better comprehensive mechanical properties than single stage aging.
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页码：3884 / 3891
页数：8
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