7A60铝合金ECAP过程第二相演化行为及机理

doi:10.11896/j.issn.1005-023X.2018.18.017

Abstract
Figure/Table
References
Related Citation (6)

Download:

Full Text ( PDF ) (3076KB)
Export: BibTeX | EndNote (RIS)

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.

Key words： equal channel angular pressing 7A60 aluminum alloy second phase dissolve ductile fracture

Published: 18 October 2018

CLC number:

TG379

	Service
	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	XUE Kemin
	BO Dongqing
	WANG Boxiaotian
	Liu Mei
	LI Ping

Cite this article:

XUE Kemin,BO Dongqing,WANG Boxiaotian, et al. Evolution Behavior and Mechanism of Equal Channel Angular Pressing on the Second Phase of Rolled 7A60 Aluminum Alloy[J]. Materials Reports, 2018, 32(18): 3195-3198.

URL:

http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.18.017 OR http://www.mater-rep.com/EN/Y2018/V32/I18/3195

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 SiC_P/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SiC_P/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.