Deformation Behavior, Microstructure and Texture Evolution of 5052 Aluminum Alloy Under Electropulsing Tensile
WANG Xinyu1, XU Chun2, LI Yu2, PANG Linghuan2, WANG Binjun2, CHEN Jianbin2
1 School of Mechanical and Engineering, Shanghai Institute of Technology, Shanghai 201418, China 2 School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
Abstract: The influence of pulsed current on the deformation behavior, microstructure and texture evolution of 5052 aluminum alloys was studied by X-ray diffraction (XRD) and transmission electron microscope (TEM) during electropulsing tensile tests with different current densities. From the experimental results, the engineering stress-strain curve with electropulsing shows a unique ratchet shape and characteristic of dynamic recrystallization, which is totally different from the work hardening curve without electropulsing. The increase of current density can result in only a little decrease of the tensile strength, but greatly improve the plasticity, such as, the tensile strength only decreases from 238 MPa to 210 MPa, and the total elongation is improved from 9% to 24% at a current density of 16.80 A/mm2. Moreover, the orientation distribution function (ODF) maps show that deformation texture is dominant in the tensile specimens without electropulsing, while deformation texture is weakened and it transforms into recrystallized Cube {100}〈001〉texture in tensile specimens with electropulsing. Transmission electron microscopy (TEM) shows that there is a large amount of recrystallization in the tensile specimens with electropulsing, while plenty of cell structures with high density dislocations are observed in the tensile specimen without electropulsing. The texture evolution show that the imposed electric pulse contributes to an orientation transformation from S {123}〈634〉 texture with a low Schmid factor to Cube texture with a high Schimid factor, which enhances the activation of slip system and thus increases plasticity. Briefly, a significantly improvement of plasticity and formability of 5052 aluminum alloys can be attributed to the enhanced dynamic recrystallization and texture transformation during the electropulsing tensile process.
1 Troitskii O A. Zhetf Pisma Redaktsiiu, 1969, 10, 11. 2 Wu W C, Wang Y J, Wang J B, et al. Materials Science and Enginee-ring:A, 2014, 608, 190. 3 Wu W C. Effect of electrical pulse processing on the microstructures and material properties of 2024 aluminum alloy. Ph.D. Thesis, Northwestern Polytechnical University, China, 2015 (in Chinese). 武伟超. 电脉冲对2024铝合金力学性能及微观组织影响研究. 博士学位论文, 西北工业大学, 2015. 4 Sprecher A F, Mannan S L, Conrad H. Acta Metallurgica, 1986, 34, 1145. 5 Conrad H, Sprecher A F, Cao W D, et al. JOM, 1990, 42, 28. 6 Okazaki K, Kagawa M, Conrad H. Scripta Metallurgica, 1978, 12, 1063. 7 Okazaki K, Kagawa M, Conrad H. Scripta Metallurgica, 1979, 13, 277. 8 Okazaki K, Kagawa M, Conrad H. Materials Science and Engineering, 1980, 45, 109. 9 Klimov K M, Novikov I I. Strength of Materials, 1984, 16, 270. 10 Conrad H. Materials Science and Engineering: A, 2000, 287, 276. 11 Conrad H. Materials Science and Engineering: A, 2002, 322, 100. 12 Li D, Yu E, Liu Z. Materials Science and Engineering: A, 2013, 580, 410. 13 Tang G Y, Zheng M X , Zhu Y H, et al. Steel Wire Products, 1997, 23(1), 6(in Chinese). 唐国翌, 郑明新, 朱永华,等. 金属制品, 1997, 23(1), 6. 14 Jae-Hun Roh, Jeong-Jin Seo, Sung-Tae Hong, et al. International Journal of Plasticity, 2014, 58, 84. 15 Kim W, Yeom K H, Thien N T, et al. CIRP Annals, 2014, 63, 273. 16 Zhu R, Tang G. Metal Science Journal, 2016, 33, 546. 17 Zhou Y. Deformation behaviour and its mechanism of TC4 during electroplastic drawing. Master′s Thesis, Dalian University of Technology, China, 2013 (in Chinese). 周岩. TC4钛合金电塑性拉拔变形行为及机理. 硕士学位论文, 大连理工大学, 2013. 18 Xu Q, Tang G, Jiang Y, et al. Materials Science & Engineering A, 2011, 528, 3249. 19 Xu Q, Guan L, Jiang Y, et al. Materials Letters, 2010, 64, 1085. 20 Liu K, Dong X, Xie H, et al. Journal of Alloys and Compounds, 2016, 676, 106. 21 Singh R K, Singh A K, Prasad N E. Materials Science and Engineering: A, 2000, 277, 114. 22 Wu D. The casting texture transformation for pure aluminium modified by electric pulse and its effect on the corrosion resistance. Master′s Thesis, Liaoning University of Technology, China, 2015 (in Chinese). 吴敌. 电脉冲作用下纯铝铸造织构转变及其对耐蚀性的影响. 硕士学位论文, 辽宁工业大学, 2015. 23 Li Y. The casting texture transformation for pure Al-Cu alloy modified by electric pulse and its effect on the corrosion resistance. Master′s Thesis, Liaoning University of Technology, China, 2015 (in Chinese). 李扬. 电脉冲作用下铝铜合金铸造织构转变及其对耐蚀性的影响. 硕士学位论文, 辽宁工业大学, 2015. 24 Sidor J J, Petrov R H, Kestens L A I. Materials Characterization, 2011, 62, 228. 25 Liu W C, Man C S, Morris J G. Scripta Materialia, 2001, 45, 807. 26 Liu W C, Morris J G. Scripta Materialia, 2002, 47, 743. 27 Ma Q C, Xu Y, Mao W M. Journal of Plasticity Engineering, 2008, 15(3), 29(in Chinese). 马全仓, 徐阳, 毛卫民.塑性工程学报, 2008, 15(3), 29. 28 Cai C B. Study on the evolution of texture of 1050 aluminum alloy during processes of deformation and recrystallization. Ph.D. Thesis, Harbin University of Science and Technology, China, 2009 (in Chinese). 蔡春波. 1050铝合金形变和再结晶过程中的织构演变研究. 博士学位论文, 哈尔滨理工大学, 2009. 29 Samajdar I, Verlinden B, Rabet L, et al. Materials Science and Enginee-ring A, 1999, 266, 146. 30 Sebald R, Gottstein G. Acta Materialia, 2002, 50, 1587. 31 Crumbach M, Goerdeler M, Gottstein G. Acta Materialia, 2006, 54, 3275. 32 Dalland O, Nes E. Acta Materialia, 1996, 44, 1389. 33 Dalland O, Nes E. Acta Materialia, 1996, 44, 1413. 34 Samajdar I, Doherty R D. Acta Materialia, 1998, 46, 3145. 35 Vatne H E, Shahani R, Nes E. Acta Materialia, 1996, 44, 4447. 36 Cotterill R M J. Philosophical Magazine, 1963, 8, 1937.
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2020, Vol. 34 
