Evolution Behavior and Mechanism of Equal Channel Angular Pressing on the Second Phase of Rolled 7A60 Aluminum Alloy
XUE Kemin1,2, BO Dongqing2, WANG Boxiaotian1, Liu Mei1, LI Ping1
1 School of materials science and engineering, Hefei university of technology, Hefei 230009; 2 Intelligent Manufacturing institute of HFUT, Hefei 230009
Abstract: The evolution of the multicomponent alloy phase in 7A60 aluminum alloy before and after ECAP processing were studied by means of X-ray diffraction, scanning electron microscopy (SEM) and optical microscopy (OM). The results revealed that MgZn2 and Al2Cu were mainly phase in 7A60 aluminum alloy. ECAP could significantly break the coarse secondary phases and improved the unifor-mity of its distribution. The secondary phase was refined in the shear direction and the main second phase (MgZn2) dissolved into the aluminum matrix with the deformation pass increasing. After four passes, globularization of secondary phase was greatly promoted with the grain size decreasing from 5—20 μm to about 1 μm. With the increase of deformation pass, the strength of the alloy was enhanced, the tensile strength from 305 MPa in the initial state was up to 492 MPa after 4 passes. The tensile fracture was manifested as a ductile fracture, and the secondary phase played a decisive role to the shape and size of the dimple.
薛克敏, 薄冬青, 王薄笑天, 刘梅, 李萍. 7A60铝合金ECAP过程第二相演化行为及机理[J]. 材料导报, 2018, 32(18): 3195-3198.
XUE Kemin, BO Dongqing, WANG Boxiaotian, Liu Mei, LI Ping. Evolution Behavior and Mechanism of Equal Channel Angular Pressing on the Second Phase of Rolled 7A60 Aluminum Alloy. Materials Reports, 2018, 32(18): 3195-3198.
1 Wang Xue hui, Wang Ji hui. Fu Congwei. Characterization of pitting corrosion of 7A60 aluminum alloy by EN and EIS techniques[J].Transactions of Nonferrous Metals Society of China,2014,24(12):3907. 2 Liu Zhou, He Yuhuai, Liu Changkui, et al. Tensile fracture characteristics of ZL101 aluminum alloy[J].Mechanical Engineering Materials,2014,38(2):82(in Chinese). 刘洲,何玉怀,刘昌奎,等.ZL101铝合金的拉伸断裂特征[J].机械工程材料,2014,38(2):82. 3 Wang Sumei, Sun Kangning, Liu Rui, et al. Effects of second-phase particles on grain refinement of ECAP-extruded 2A12 aluminum alloy[J].Materials Science and Technology,2007,15(1):115(in Chinese). 王素梅,孙康宁,刘睿,等.第二相粒子对ECAP挤压的2A12铝合金晶粒细化的影响[J].材料科学与工艺,2007,15(1):115. 4 Zhao Hongjin, Hu Yujun, Kuang Junping, et al. Study on the second phase state of equal channel angular extrusion[J].Hot Working Technology,2015,44(11):9(in Chinese). 赵鸿金,胡玉军,旷军平,等.等通道角挤压第二相状态研究进展[J].热加工工艺,2015,44(11):9. 5 Li Ping, Zhang Xiang, Xue Keming, et al. New process deformation of pure aluminum equal channel angular pressing twist[J].Chinese Journal of Plasticity Engineering,2010,17(5):47(in Chinese). 李萍,张翔,薛克敏,等.纯铝等径角挤扭新工艺变形[J].塑性工程学报,2010,17(5):47. 6 Duan Yulu, Tang Lei, Xu Guofu, Deng Ying. Microstructure and mechanical properties of 7005 aluminum alloy processed by room temperature ECAP and subsequent annealing[J].Journal of Alloys and Compounds.2016,664(15):518. 7 Cepeda-jiménez C M, Cepeda-jiménez J M, Rauch E F,et al. Influe-nce of processing severity during equal-channel angular pressing on the microstructure of an Al-Zn-Mg-Cu alloy[J].Metallorgical and materials transactions A,2012,43(11):4224. 8 Cepeda-jiménez C M, García-infanta J M,Ruanooa, et al. Mechanical properties at room temperature of an Al-Zn-Mg-Cu alloy processed by equal channel angular pressing[J].Journal of Alloys and Compounds,2011,509(35):8649. 9 Liu Hong li, Li Ping, Xue Keming, et al. Effects of equal diameter angular twist on microstructure and mechanical properties of SiCP/Al composites[J].Powder Metallurgy Materials Science and Enginee-ring,2016,21(6):817(in Chinese). 刘红丽,李萍,薛克敏,等.等径角挤扭对SiCP/Al复合材料微观结构及力学性能的影响[J].粉末冶金材料科学与工程,2016,21(6):817. 10 Tian Haining, Cao Guanghui, Ren Zhongming. Formation of second phase in YAg and YCu and its effect on mechanical properties[J].Materials Review B: Research Papers,2011,25(7):107(in Chinese). 田海宁,操光辉,任忠鸣.YAg和YCu中第二相的形成及其对力学性能的影响[J].材料导报:研究篇,2011,25(7):107.11 Olaf Engler,Simon Miller-Jupp.Control of second-phase particles in the Al-Mg-Mn alloy AA 5083[J].Journal of Alloys and Compounds,2016,689(25):998. 12 Zhang Jinshan,Chao Xin. Microstructure and mechanical properties of Mg-Zn-Dy-Zr alloy with long-period stacking ordered phases by heat treatments and ECAP process[J].Materials Science and Engineering,2014,611(12):108. 13 Tan Guoyin, Yue Youcheng, Yang Gang, et al. Evolutionary behavior of Al-Fe-Si second-phase particles in rolling process in 1235 ultra-thin double-zero aluminum foil[J].Rare Metal Materials and Engineering,2016,45(4):979(in Chinese). 谭国寅,岳有成,杨钢,等.1235超薄双零铝箔坯料中Al-Fe-Si第二相粒子在轧制过程中演化行为[J].稀有金属材料与工程,2016,45(4):979. 14 Shin H D, Pak J J, Kim Y K, et al. Effect of pressing temperature on 44 microstructure and tensile behavior of low carbon steels processed by equal channel angular pressing[J].Materials Science and Engineering,2002,325(1):31. 15 Liu Gang, Zhang Guojun. Fracture toughness model of high strength aluminum alloy with different scales of the second phase[J].Transactions of Nonferrous Metals Society of China,2002,12(4):707.
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2018, Vol. 32 
