Texture and Mechanical Properties of Pure Copper Deformed by Asymmetrical Accumulative Roll-bonding
ZHOU Lei1, SHI Qing-nan1, WANG Jun-li2, MI Hui1, LIU Run1
1. Faculty of Material Science and Engineering, Kunming University of Science & Technology, Kunming 650093, China;
2. Research Center for Analysis and Measurement, Kunming University of Science and Technology, Kunming 650093, China
Abstract：Pure copper sheets were prepared by Asymmetrical Accumulative Rolling Bonding(AARB) at room temperature. By optical microscopy, scanning electron microscopy(SEM) with electron backscattered diffraction(EBSD),X-ray diffractometer(XRD) with texture accessories and stretch mechanics performance tests, the microstructure,texture and mechanical properties of pure copper sheets by AARB were discussed. The results show that after six times of AARB, the grains of copper is refined by compression deformation and shearing deformation ,and the average grain size is refined to 5μm. Texture of sample main composed of {112}〈111〉, {123}〈634〉,{011}〈211〉 and {011}〈100〉. Yield strength and tensile strength of sample increase obviously.σ0.2 and σb got to 348MPa and 452MPa separately. The elongation of sample decreases to 2.3% after the second pass, and then it decreases a little with the rise of the equivalent strain.
周蕾, 史庆南, 王军丽, 米辉, 刘润. 异步累积叠轧纯铜材的取向变化过程与力学性能[J]. 材料工程, 2013, 0(3): 38-41,50.
ZHOU Lei, SHI Qing-nan, WANG Jun-li, MI Hui, LIU Run. Texture and Mechanical Properties of Pure Copper Deformed by Asymmetrical Accumulative Roll-bonding. Journal of Materials Engineering, 2013, 0(3): 38-41,50.
[1] SAITO Y,UTAUNOMIYA H,TSUJI N,et al. Novel ultrahigh straining process for bulk materials: development of the accumulative roll-bonding process [J]. Acta Mater,1999,47(2):579-583.[2] SAITO Y,TSUJI N,UTAUNOMIYA H,et al. Ultra-fine grained bulk aluminum produced by accumulative roll-bonding process[J]. Scripta Mater,1998,39(9):122-1227.[3] JANG Y H,KIM S S,HAN S N,et al. Effect of trace phosphorous on tensile behavior of accumulative roll boned oxygen-free copper[J]. Scripta Mater,2005,52(1):21-24.[4] PEREZ-PRADO M T,DEL V J A,RUANO O A. Grain refinement of Mg-Al-Zn alloys via accumulative roll bonding[J]. Sricpta Mater,2004,51(11):1093-1097.[5] 王军丽, 史庆南, 王效琪.异步累积叠轧技术制备超细晶铜材退火过程组织及取向研究[J].材料工程,2008,(11):5-8.WANG Jun-li,SHI Qing-nan,WANG Xiao-qi. Study on microstructure and orientation evolution of ultra-fine grained copper prepared by asymmetrical accumulative rolling bonding (AARB)during annealing[J]. Journal of Materials Engineering,2008,(11):5-8.[6] KIM W J,LEE J B,KIM W Y,et al. Microstructure and mechanical properties of Mg-Al-Zn alloy sheets severely deformed by asymmetrical rolling[J]. Scripta Mater,2007,56(4): 309-312.[7] 杨德庄. 位错与金属强化机制[M]. 哈尔滨:哈尔滨工业大学出版社,1991.[8] 运新兵, 宋宝韫, 陈莉.连续等径角挤压制备超细晶铜[J]. 中国有色金属学报,2006,16(9): 1563—1569.YUN Xin-bing,SONG Bao-yun,CHEN Li. Ultra-fine grain copper prepared by continuous equal channel angular press[J]. The Chinese Journal of Nonferrous Metals,2006,16(9):1563-1569.[9] 张继东,李才巨,朱心昆,等. 大塑性变形对纯铜力学性能的影响[J]. 云南冶金,2007,36(1):56-58.ZHANG Ji-dong,LI Cai-ju,ZHU Xin-kun,et al. Effect of severe plastic deformation(SPD) on the mechanical properties of pure Cu[J]. Yunnan Metallurgy, 2007,36(1): 56-58.[10] DAO M,LU L,SHEN Y F,et al. Strength, strain-rate sensitivity and ductility of copper with nanoscale twins[J]. Acta Materialia, 2006,54(20): 5421-5432.[11] ZHANG Y G, LU J, ZHANG H W, et al. Strengthening and toughening by interface-mediated slip transfer reaction in nanotwinned copper[J]. Scripta Materialia, 2009,60(7): 508-511.[12] ZHANG Y, TAO N R,LU K. Mechanical properties and rolling behaviors of nano-grained copper with embedded nano-twin bundles[J]. Acta Materialia, 2008,56(11): 2429-2440.
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