Effect of Strain Rate on Deformation Structure and Orientation of Pure Aluminum
WANG Bing1,2, QIAO Jisen1,2, XIA Zonghui1,2
1 State Key Laboratory of Advanced and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China 2 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China
Abstract: During plastic deformation,there are complex deformation mechanism in the process of grain refinement. Further deformation will not change the overall microstructure and properties when the material microstructure reaches a stable state. The minimum size not only depend on the material internal properties, for example crystal structure and stacking fault energy,it is also affected by external conditions, such as strain rate and deformation temperature. 1060 commercial pure aluminum was investigated in high strain rate deformation (500—1 500 s-1)by Split Hopkinson Pressure Bar. Microstructural and crystal orientation were characterized using FEI Verios 460 SEM and FEI Nano SEM Nova 430, respectively. The results show that the increase of strain ratethe grains are refined obviously and the preferred orientation exists in the grains. Forming a large number of low angle grain boundaries, the hardness reaches 430 MPa. It shows that for pure aluminum with high dislocation energy and low melting point, high strain rate can promote the formation of low angle grain boundary and improve the hardness of the material.
1 Meyers M A, Mishra A, Benson D J.Progress in Materials Science, 2006, 51(4), 427. 2 Muñoz Jairo Alberto.Materials Letters, 2019, 238(1), 42. 3 Huang F, Tao N R, Lu K.Journal of Materials Science & Technology, 2011, 27(7), 628 (in Chinese). 黄丰, 陶乃镕, 卢柯. 材料科学技术, 2011, 27(7), 628. 4 Xu W, Liu X C, Lu K.Acta Materialia, 2018, 152(15), 138. 5 Huang X, Kamikawa N, Hansen N.Journal of Materials Science, 2008, 43(23-24), 7397. 6 Li W L, Tao N R, Lu K.Scripta Materialia, 2008, 59(5), 546. 7 Naghdy Soroosh, Kestens Leo, Hertelé Stijn, et al.Materials Characte-rization, 2016, 120, 285. 8 Lu K.Nature Reviews Materials, 2016, 1(5), 1. 9 Valiev Ruslan Z, Estrin Yuri, Horita Zenji, et al.JOM, 2006, 58(4), 33. 10 Estrin Y, Vinogradov A.Acta Materialia, 2013, 61(3), 782. 11 Peng H R, Gong M M, Chen Y Z, et al.International Materials Reviews, 2016, 62(6), 303. 12 Zhou X, Li X Y, Lu K.Science, 2018, 360(6388), 526. 13 Mohamed Farghalli A.Acta Materialia, 2003, 51(14), 4107. 14 Ovid'ko I A, Valiev R Z, Zhu Y T.Progress in Materials Science, 2018, 94, 462. 15 Yang Y, Chen Y D, Hu H B, et al.Journal of Materials Research, 2015, 30(22), 3502. 16 Dou Z Y, Jiang L T, Wu G H, et al.Scripta Materialia, 2007, 57(10), 945. 17 Yang Yang, Wang Junliang, Chen Yadong, et al.Transactions of Nonferrous Metals Society of China, 2018, 28(1), 1 (in Chinese). 杨扬, 王君良, 陈亚东, 等. 中国有色金属学报, 2018, 28(1), 1. 18 Cordero Z C, Knight B E, Schuh C A.International Materials Reviews, 2016, 61(8), 495. 19 Ito Yuki, Edalati Kaveh, Horita Zenji.Materials Science and Engineering: A, 2017, 679, 428. 20 Schiøtz Jakob, Di Tolla Francesco D, Jacobsen Karsten W.Nature, 1998, 391(6667), 561. 21 Kocks U F, Mecking H.Progress in Materials Science, 2003, 48(3), 171. 22 Hansen Niels. Scripta Materialia, 2004, 51(8), 801. 23 Huang F, Tao N R.Journal of Materials Science & Technology, 2011, 27(1), 1 (in Chinese). 黄丰, 陶乃镕. 材料科学技术, 2011, 27(1), 1. 24 Mishin O V, Godfrey A, Juul Jensen D, et al.Acta Materialia, 2013, 61(14), 5354. 25 Li Y, Zhang Y, Tao N, et al.Acta Materialia, 2009, 57(3), 761. 26 Humphreys John, Rohrer Gregory S, Rollett Anthony.Recrystallization and related annealing phenomena, Elsevier, Netherlands, 2017. 27 Winning M, Rollett A D, Gottstein G, et al.Philosophical Magazine, 2010, 90(22), 3107.