Improving room temperature formability of twin-roll cast Mg-Al-Zn-Sn alloy by repeated bending

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Improving room temperature formability of twin-roll cast Mg-Al-Zn-Sn alloy by repeated bending

TOZUKA Hotaka, WATARI Hisaki, HAGAToshio

Abstract. A twin-roll cast Mg-9mass%Al-1 mass%Zn-2mass%Sn alloy was used for the purpose of fabricating for wrought magnesium alloy which can be bent in the room temperature. An appropriate solution annealing time was found in order to reduce beta phase precipitation, which may cause cracking without coarsening of crystal grain size while for improving cold formability of twin-roll cast Mg-9mass%Al-1 mass%Zn-2 mass%Sn alloy. After solution heat treatment of the twin-roll casting of the material, repeated bending by three rolls of the solution heat treated strip was performed in order to examine of bendability of the materials. It has been clarified that repeatedly bending and reverse bending after solution heat treatment were effective for improving formability of the Mg-9mass%Al-1 mass%Zn-2 mass% Sn alloy at room temperature.

Keywords
Twin-Roll Casting, Solution Heat Treatment, Cold Formability, Mg-Al-Zn-Sn Alloy

Published online 4/24/2024, 7 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: TOZUKA Hotaka, WATARI Hisaki, HAGAToshio, Improving room temperature formability of twin-roll cast Mg-Al-Zn-Sn alloy by repeated bending, Materials Research Proceedings, Vol. 41, pp 2499-2505, 2024

DOI: https://doi.org/10.21741/9781644903131-275

The article was published as article 275 of the book Material Forming

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] P.G. Partridge, The crystallography and deformation modes of hexagonal closed-packed metals, Int. Metall. Rev. 12 (1967) 169–194. https://doi.org/10.1179/mtlr.1967.12.1.169
[2] M.H. Yoo, Slip, twinning and fracture in hexagonal close-packed metals, Metall. Trans. A 12 (1981) 409–418. https://doi.org/10.1007/BF02648537
[3] T.M. Pollock, Weight loss with magnesium alloys, Science 328 (2010) 986–987. https://doi.org/10.1126/science.1182848
[4] J. Koike, T. Kobayashi, T. Mukai, H. Watanabe, M. Suzuki, K. Maruyama, K. Higashi, The activity of non-basal slip systems and dynamic recovery at room temperature in fine-grained AZ31B magnesium alloys, Acta Mater. 51 (2003) 2055–2065. https://doi.org/10.1016/S1359-6454(03)00005-3
[5] W.B. Hutchinson, M.R. Barnett, Effective values of critical resolved shear stress for slip in polycrystalline magnesium and other hcp metals, Scr. Mater. 63 (2010) 737–740. https://doi.org/10.1016/j.scriptamat.2010.05.047
[6] E. Tolouie, R. Jamaati, Asymmetric cold rolling, A technique for achieving non-basal texture in AZ91 alloy, Mater. Lett., 249 (2019) 143-146. https://doi.org/10.1016/j.matlet.2019.04.087
[7] R.L. Dietrich, Surface orientation and rolling of magnesium sheet, JOM 1 (1949) 621-626. https://doi.org/10.1007/BF03398906
[8] T.T. Sasaki, J.D. Ju, K. Hono, K.S. Shin, Heat-treatable Mg-Sn-Zn wrought alloy, Scripta Mater., 65 (2009) 80-83. https://doi.org/10.1016/j.scriptamat.2009.03.014
[9] T.T. Sasaki, K. Oh-ishi, T. Ohkubo, K. Hono, Enhanced age hardening response by the addition of Zn in Mg-Sn alloys, Scripta. Mater., 55 (2006) 251-254. https://doi.org/10.1016/j.scriptamat.2006.04.005
[10] W.L. Cheng, H.S. Kim, B.S. You, B.H. Koo, S.S. Park, Strength and ductility of novel Mg–8Sn–1Al–1Zn alloys extruded at different speeds, Mater. Lett. 65 (2011) 1525-1527. https://doi.org/10.1016/j.matlet.2011.03.010
[11] H. Liu, Y. Chen, Y. Tang, Y. Tang, S. Wei, G. Niu, Tensile and indentation creep behavior of Mg-5% Sn and Mg-5% Sn-2% Di alloys, Mater. Sci. Eng., A, 464 (2007) 124-128. https://doi.org/10.1016/j.msea.2007.02.061
[12] S.H. Park, S.H. Kim, H.S. Kim, J. Yoon, B.S. You, High-speed indirect extrusion of Mg-Sn-Al-Zn alloy and its influence on microstructure and mechanical properties, J. Alloys Compd., 667 (2016) 170-177. https://doi.org/10.1016/j.jallcom.2016.01.163