Microstructure and Mechanical Properties of Ultrafine Grained Complex Copper Alloy Fabricated by Accumulative Roll-Bonding Process

被引:1
作者
Lee, Seong-Hee [1 ]
Lim, Cha-Yong [2 ]
机构
[1] Mokpo Natl Univ, Dept Adv Mat Sci & Engn, Chungnam 534729, South Korea
[2] Korea Inst Mat Sci, Dept Mat Technol, Chang Won 641010, Kyungnam, South Korea
关键词
Accumulative Roll-Bonding; Ultrafine Grain; Copper Alloy; Mechanical Properties; Texture; ANNEALING CHARACTERISTICS; NANO-GRAINS; COMPOSITES; EVOLUTION; CU;
D O I
10.1166/jnn.2014.9470
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Accumulative roll-bonding (ARB) process using dissimilar copper alloys was performed up to six cycles (similar to an equivalent strain of 4.8) at ambient temperature without lubricant for fabrication of a new complex copper alloy. The dissimilar copper alloy sheets of oxygen free copper (OFC) and dioxide low-phosphorous copper (DLPC) with thickness of 1 mm were degreased and wire-brushed for the ARB process. The sheets were then stacked together and rolled by 50% reduction so that the thickness became 1 mm again. The sheet was then cut to the two pieces of same length and the same procedure was repeated up to six cycles. A new sound complex copper alloy sheet in which OFC and DLPC are combined each other was successfully fabricated by the ARB process. The tensile strength of the copper alloy increased with increasing the number of ARB cycles, reached 492 MPa after six cycles, which is about three times of the initial material. The average grain size was 12.6 mu m after the 1st cycle, but it became 1.5 mu m after six cycles. Microstructures and mechanical properties of the complex copper alloy fabricated by the ARB were investigated in detail.
引用
收藏
页码:8014 / 8018
页数:5
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