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《Materials for Mechanical Engineering》 2013-10
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One-Way Static Tensile Failure Behavior of Ultrafine-Twined Pure Copper with High Strength

ZHOU Lei;WANG Jun-li;LIU Run;SHI Qing-nan;YUE You-cheng;Faculty of Material Science and Engineering,Kunming University of Science and Technology;Research Center for Analysis and Measurement,Kunming University of Science and Technology;  
Ultrafine-twined pure copper was prepared by asymmetrical accumulative roll-bonding(AARB) and followed recrystallization annealling.The one-way tensile properties and the fracture behavior of the copper after AARB and recrystallization annealling were investigated by tensile test and scanning electron microscopy(SEM). The results show the tensile strength and breaking elongation of pure copper deformed by 6passes in AARB were 543MPa and 5.67%;after the recrstallization annealling treatment at 240 ℃for 40minutes,the ultrafine-twined copper achieved 546MPa in tensile strength and 7.31%in breaking elongation.The bonding mechanism of AARB deformation was crack bonding.Rolled after 6passes AARB,the failure mechanism of copper was hole-joining fracture;and the fracture morphology of ultrafine-twined copper after recrystallization annealling was composed of dimples and cleavage steps.
【Fund】: 国家自然科学基金资助项目(50804018);; 稀贵及有色金属先进材料教育部重点实验室开放基金资助项目(ZDS2010015C);; 2010云南省科技条件平台建设计划项目(2010DH025)
【CateGory Index】: TG335
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