Effects of asymmetry and annealing on interfacial microstructure and mechanical properties of Cu/Al laminated composite fabricated by asymmetrical roll bonding

被引:53
作者
Chang, Dongxu [1 ]
Wang, Ping [1 ]
Zhao, Yingying [1 ]
机构
[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang, Liaoning, Peoples R China
基金
中国国家自然科学基金;
关键词
Interface; Annealing; Asymmetrical roll bonding; Laminated composite; Intermetallic compound; Mechanical property; AL-CU STRIPS; CLAD COMPOSITE; INTERMETALLIC COMPOUNDS; STRENGTH DEVELOPMENT; COPPER; BEHAVIOR;
D O I
10.1016/j.jallcom.2019.152453
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Cu/Al laminated composite was fabricated by means of asymmetrical roll bonding and annealing process. The interfacial microstructure and mechanical properties of clad sheets were studied to explore the influence of rotation speed ratio and annealing temperature. The characteristic of interfacial bonding and distribution of intermetallic compounds were analyzed via the fracture behaviour of interface. The results reveal that asymmetry in roll bonding and subsequent annealing improve the interface with a three-layer structure. Due to thermal diffusion, large numbers of intermetallic compounds form in the interfacial interlayer, including Al2Cu, AlCu and Al4Cu9 from aluminium to copper matrix. The increasing annealing temperature enhances the microhardness of interface and weakens the interfacial bonding. The clad sheet with rotation speed ratio 1.3 has higher bond strength and better tensile properties. High rotation speed ratio of rolls reduces the bond strength due to decreasing rolling force, though the breakage of metal surface is promoted. The interfacial interlayer fractures along the sublayer adjacent to copper matrix in peeling tests. (C) 2019 Elsevier B.V. All rights reserved.
引用
收藏
页数:9
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