Determination of Recrystallization Temperature of Varying Degrees Formed Aluminium, by DMTA Technique

Authors: Zsolt Dugár, Péter Barkóczy, Gábor Béres, Dávid Kis, Attila Bata, Tamás Dugár, Zoltán Weltsch

Abstract:

This study is about the structural transformations of aluminium examining with the Dynamic Mechanical Thermal Analyzer (DMTA). It is a faster and simpler measuring method to make consequence about the metal’s structural transformations. The device measures the changing of the mechanical characteristics depending on the heating rate, and concludes certain transformations. This measuring method fast and shows clean-cut results comparing the conventional ways. Applying polymer measuring devices for metal investigations is not widespread method. One of the adaptable ways is shown in this study. The article compares the results of the small specimen test and the DMTA method, considering the temperature and the forming dependence of recrystallization temperature.

Keywords: DMTA, recrystallization, cold forming, rotation.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100893

References:

[1] Damelis Pino, Luis Acuna, Ney José Luiggi: Study Of the Mg2Si Phase in a 6063 Al Commercial Alloy Using Dilatometric Techniques, Materials Science Frum Vols. 217-222 (1996) pp 833 – 838.
[2] G.D. Fan, M.Y. Zheng, X.S. Hu, C. Xu, K. Wu, I.S. Golovin: Effect of heat treatment on internal friction in ECAP processed commercial pure Mg, Journal of Alloys and Compounds 549 (2013) 38–45, 2013
[3] G. Thomas, j. inst. of Metals 90, 57 , 1961
[4] A. Lutts, Act Metall 9, 577 , 1961
[5] R. C. Dorward, Metall Trans 4, 507 , 1982
[6] J. P. Linch. L. M. Brown and M. H. Jacobs Act. Metall 30, 1389, 1982
[7] N. J. Luggi and A. E. Betancourt, Metall and Mat. Trans. B 25 B, 917, 1994
[8] L. F. Mondolofo, Aluminium Alloys, Structure and Properties, Butter Worths, London 1976
[9] Kirchfeld Mária: Műszaki anyagok, SZE, Győr, 2007.
[10] Z.C. Zhou, J.Y. Xiong, S.Y. Gu, D.K. Yang, Y.J. Yan , J. Du: Anelastic relaxation caused by interstitial atoms in b-type sintered Ti–Nb alloys, Journal of Alloys and Compounds 509 (2011) 7356–7360, 2011
[11] J.L. Murray, Phase Diagram of Binary Titanium Alloys, Materials Park, ASM, Ohio 1987.
[12] G.D. Fan, M.Y. Zheng, X.S. Hu, C. Xu, K. Wu, I.S. Golovin: Effect of heat treatment on internal friction in ECAP processed commercial pure Mg, Journal of Alloys and Compounds 549 (2013) 38–45, 2013
[13] Shih-Hang Chang: Internal friction of Cu–13.5Al–4Ni shape memory alloy measured by dynamic mechanical analysis under isothermal conditions, Materials Letters 64 (2010) 93–95, 2010
[14] Adelaide Nespoli, Francesca Passaretti, Elena Villa: Phase transition and mechanical damping properties: A DMTA study of NiTiCu shape memory alloys, Intermetallics, Volume 32 (2013) 394-400, 2013
[15] R.E. Wetton, J.S. Fisher, K.E. Pettitt, A. Evans, J.C. Duncan, American Laboratory, (1993)
[16] Menard, Kevin P.: Dynamic Mechanical Analysis: A Practical Introduction. CRC Press (1999)
[17] J. Màs et al.: "Dynamic mechanical properties of polycarbonate and acrylonitrile-butadiene-styrene copolymer blends". Journal of Applied Polymer Science 83 (7) (2002) 1507–1516