Microstructure and mechanical properties of ultra-lightweight Mg-Li-Al/Al-Li composite produced by accumulative roll bonding at ambient temperature

被引:41
作者
Wang, Yang [1 ]
Liao, Yang [1 ]
Wu, Ruizhi [1 ,2 ]
Turakhodjaev, Nodir [3 ]
Chen, Hongtao [4 ]
Zhang, Jinghuai [1 ]
Zhang, Milin [1 ,2 ]
Mardonakulov, Sharofuddin [1 ,3 ]
机构
[1] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Heihe Univ, Coll Sci, Heihe 164300, Heilongjiang, Peoples R China
[3] Tashkent State Tech Univ, Machine Bldg Dept, Tashkent 100056, Uzbekistan
[4] Harbin Univ Sci & Technol, Sch Mat Sci & Engn, Harbin 150040, Peoples R China
来源
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 787卷
基金
中央高校基本科研业务费专项资金资助;
关键词
Accumulative roll bonding; Mg-Li-Al; Al-Li; Atomic diffusion; Microstructure; TEXTURE EVOLUTION; SHEAR STRAIN; STRENGTH; ALLOYS; ANISOTROPY; BEHAVIOR;
D O I
10.1016/j.msea.2020.139494
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Microstructural evolution and mechanical properties of ultra-lightweight Mg-14 wt% Li-1wt.% Al/Al-2wt.% Li composite produced by accumulative roll bonding (ARB) at ambient temperature were investigated. The computational simulation revealed the complicated stress and strain distribution in Mg-Li-Al and Al-Li layers during ARB process. The compositions of Al and Mg elements across the interface between Mg-Li-Al and Al-Li layers were increasingly homogeneous with the increase of ARB cycles due to the atomic inter-diffusion, indicating that the bonding between Mg-Li-Al and Al-Li layers was gradually improved. The grain sizes of Mg-Li-Al and Al-Li layers were decreased to about 300 nm and 200 nm after 4 cycles of ARB process, respectively. The brittle intermetallic compounds of Al3Mg2 and Al12Mg17 were gradually formed with the increase of ARB cycles. The microhardness and strength of Mg-Li-Al/Al-Li composite continuously increased, however, the ductility first decreased and then increased with the increase of ARB cycles. The tensile properties, with the ultimate tensile strength (UTS) of 308 MPa and the elongation (EL) of 17.4%, were achieved after 4-cycle ARB process.
引用
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页数:9
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