In the present investigation a wrought magnesium alloy AZ31 was successfully processed by the accumulative roll-bonding (ARB) at gradient temperature up to six cycles with the lowest temperature of 250℃. This is performed through different thermomechanical processing routes (different ARB cycles at different temperatures of 350-200℃). The microstructures and mechanical properties were investigated. The results indicate that significant grain refinement is observed after the first two cycles at the highest ARB temperature as a result of dynamic recrystallization, which is necessary for the subsequently ARB cycles at relatively lower temperature with the aim to restrict grain growth. No significant finer grain size was observed through the fifth and sixth cycles while the microstructure homogeneity is further improved. The grain structure can be effectively refined at lower ARB processing temperature and higher cycles. The resulting material exhibited high strength and relatively high ductility at ambient temperature when ARB deformed above 250℃. The mechanical properties of the ARB deformed materials are strongly dependent on several main factors: the amount and the homogeneity of strain achieved, grain size and microstructure homogeneity, textures developed during ARB and interface bonding quality.
DAN Mei-Yan
,
LI Chun-Meng
,
ZHANG Wei-Wen
,
ZHANG Tai-Tong
. Processing of AZ31 magnesium alloy by accumulative roll-bonding at gradient temperature[J]. Acta Metallurgica Sinica (English Letters), 2012
, 25(1)
: 65
-75
.
DOI: 10.11890/1006-7191-121-65
[1] B.L. Mordike, T. Ebert, Mater Sci Eng A 302 (2001) 37
[2] S.R. Agnew, J.W. Senn and J.A. Horton, J Miner Met Mater Soc 58 (2006) 62
[3] Q. Yang and A.K. Ghosh, Acta Mater 54 (2006)5159
[4] R.Z. Valiev, R.K. Islamgaliev and I.V. Alexandrov, Prog Mater Sci 45 (2000) 103
[5] W.J. Kim and H.T. Jeong, Mater Trans 46 (2005)251
[6] M. Eddahbi, J.A. del Valle, M.T. Perez-Prado and O.A.Ruano, Mater Sci Eng A 410-411 (2005) 308
[7] M.T. Perez-Prado, J.A. del Valle and O.A. Ruano, Scr Mater 51 (2004) 1093
[8] Q. Yang and A.K. Ghosh, Acta Mater 54 (2006)5147
[9] N. Tsuji, Scr Mater 47 (2002) 893
[10] Y. Saito, H. Utsunomiya, N. Tsuji and T. Sakai. Acta Mater 47 (1999) 579
[11] S. Tamimi, M. Ketabchi and N. Parvin, Mater Des 30 (2009) 2556
[12] M.Y. Zhan, Y.Y. Li, W.P. Chen and W.D. Chen, J Mater Sci 42 (2007) 9256
[13] J.A. Del Valle, M.T. Perez-prado and O.A. Ruano, Mater Sci Eng A 410-411 (2005) 353
[14] S.M. Fatemi-Varzaneh, A. Zarei-Hanzaki, H. Beladi, Mater Sci Eng A 456 (2007) 52
[15] S.M. Fatemi-Varzaneh, A. Zarei-Hanzaki, M. Naderi and Ali A. Roostaei, J Alloy Compd 507 (2010) 207
[16] C. Xu, K. Xia and T.G. Langdon, Mater Sci Eng A 527 (2009) 205
[17] S.R. Agnew and O. Duygulu, Int J Plast 21 (2005) 1161
[18] W.J. Kima, H.W. Leea, S.J. Yooa and Y.B. Parkb, Mater Sci Eng A 528 (2011) 874
[19] M.T. Perez-Prado, J.A. del Valle, J.M. Contreras and O.A.Ruano, Scr Mater 50 (2004) 661
[20] Z.P. Xing, S.B. Kang and H.W. Kim, J Mater Sci 37 (2002) 717
[21] X. Huang, N. Kamikawa and N. Hansen, Mater Sci Eng A 483-484 (2008) 102
[22] N. Hansen, X. Huang, R. Ueji and N. Tsuji, Mater Sci Eng A 387-389 (2004) 191
[23] N. Ecob and B. Ralph, J Mater Sci 18 (1983)2419
[24] T. Al-Samman, G. Gottstein, Mater Sci Eng A 490 (2008) 411
WeChat