Commercial AZ31 billets were extruded to round rods at three extrusion velocities of 0.8~m/min, 1.4 m/min and 2.2 m/min, at 643 K, 673 K and 703 K, respectively. The microstructure and texture evolution at different conditions were investigated by optical microscopy (OM) and electron backscattered diffraction (EBSD) techniques. The average grain size is reduced significantly after the hot extrusion, and the microstructure is obviously inhomogeneous due to dynamic recrystallization, which is confirmed by uni-axial compression experiments at elevated temperatures with different strain rates. The uni-axial compression leads to a fibre texture, and {1120}<0110> texture is the major texture in extruded rods due to non-basal slip. As the extrusion temperature is elevated, the main texture becomes weak and other texture components appear.
FAN Xiao-Hui
. Effects of dynamic recrystallization in extruded and compressed AZ31 magnesium alloy[J]. Acta Metallurgica Sinica (English Letters), 2010
, 23(5)
: 334
-342
.
DOI: 10.11890/1006-7191-105-334
[1] S.R. Agnew, C.N. Tome, D.W. Brown, T.M. Holden and S.C. Vogel, Scr Mater 48(8) (2003) 1003.
[2] D.W. Brown, S.R. Agnew, M.A.M. Bourke, T.M. Holden, S.C.Vogel and C.N. Tome, Mater Sci Eng A 399(1-2) (2005)1.
[3] J. Koike, T. Kobayashi, T. Mukai, H. Watanabe, M. Suzuki,K. Maruyama and K. Higashi, Acta Mater 51(7) (2003)2055.
[4] S.R. Agnew, J.A. Horton, T.M. Lillo and D.W. Brown, Scr Mater 50(3) (2004) 377.
[5] T. Yamaguchi, T. Tsukeda, K. Saito and Y. Kawamura, Mater Sci Forum 503-504 (2006) 775.
[6] D.L. Yin, K.F. Zhang, G.F. Wang and W.B. Han, Mater Sci Eng A 392(1-2) (2005) 320.
[7] L. Jin, D. Lin, D. Mao, X. Zeng and W. Ding, J Alloy Compd 426(1-2) (2006) 148.
[8] R. Cottam, J. Robson, G. Lorimer and B. Davis, Mater Sci Eng A 485(1-2) (2008) 375.
[9] S.E. Ion, F.J. Humphreys and S.H. White, Acta Metall 30(10) (1982) 1909.
[10] A. Galiyev, R. Kaibyshev and G. Gottstein, Acta Mater 49(7) (2001) 1199.
[11] F. Xiong and C.H.J. Davies, Magnesium Technol (2005) 217.
[12] S.B.Yi, C.H.L. Davies, H.G. Brokemeierm, R.E. Bolmaro,K.U. Kainer and J. Homeyer, Acta Mater 54(2) (2006) 549.
[13] T. Al-Samman and G. Gottstein, Mater Sci Eng A 490(1-2) (2008) 411.
[14] S. Spigarelli, M.E. Mehtedi, M. Cabibbo, E. Evangelista,J. Kaneko, A. Jager and V. Gartnerova, Mater Sci Eng A 462(1-2) (2007) 197.
[15] X. Ruan and C. Zhang, J Shanghai Jiaotong Univ 37(12) (2003) 1874.
[16] A. Laasraoui and J.J. Jonas, Metall Trans A 22A(1) (1991) 151.
[17] H.J. McQueen, M. Myshlaev, M. Sauerborn and A. Mwembela, Magnesium Technology 2000 (TMMMS, Warrendale, 2000) p.355.
[18] H.J. McQueen, Metall Mater Trans A 33(2) (2002) 345.
[19] Z. Chen, W. Xia, H. Yan, D. Fu and J. Chen, Chem Adv 23(2) (2004) 127.
[20] I.L. Dillamore and W.T. Roberts, Metall Rev 10 (1965) 271.
[21] A. Jain and S.R. Agnew, Mater Sci Eng A 462(1-2) (2007) 29.
[22] T. Obara, H. Yoshinaga and S. Morozumi, Acta Metall 21 (1973) 845.
[23] L. Meng, P. Yang, F. Cui and Z. Zhao, J Univ Sci Technol Beijing 27(2) (2005) 187.
WeChat