Abstract
Mg-rare earth alloys have improved yield strength and creep resistance compared to commercial alloys such as AZ91, AM60 or AS21. The influence of Zn additions in Mg–Nd alloys on intermetallic phases and the resulting changes in the macroscopic mechanical behaviour of the materials are not yet fully understood. The aim of this work is to identify the effect of Zn additions on the nature of the intermetallic phases and on the mechanical properties in a Mg–4Nd (wt%) alloy. The addition of 8 wt% Zn to a base Mg–4Nd wt% alloy marginally improved the tensile and compression properties at room temperature or at 200 °C with the exception of the 0.2% proof stress of Mg–4Nd–8Zn alloys when tensile- or compression-tested at 200 °C. Two intermetallic phases, a quasi-binary Mg3(Zn, Nd) and ternary Mg50Nd8Zn42, have been identified by the means of electron microscopy and synchrotron diffraction. These results indicate that there are some discrepancies in the current thermodynamic calculations, suggesting an update to the databases may be required.
Similar content being viewed by others
References
D. Choudhuri, D. Jaeger, M.A. Gibson, R. Banerjee, Scr. Mater. 86, 32 (2014)
C.J. Bettles, M.A. Gibson, S.M. Zhu, Mater. Sci. Eng. A A505, 6 (2009)
M.A. Gibson, M. Easton, V. Tyagi, M. Murray, G. Dunlop, in Magnesium Technology (2008), p. 227
A.A. Luo, R.K. Mishra, B.R. Powell, A.K. Sachdev, Mater. Sci. Forum. Trans. Tech. Publ. 5, 69 (2012)
J.F. Nie, Metall. Mater. Trans. A 43A, 3891 (2012)
M. Huang, H. Li, H. Ding, Z. Tang, R. Mei, H. Zhou, R. Ren, S. Hao, J. Alloys Compd. 489, 620 (2010)
H. Xu, J. Fan, H.-L. Chen, R. Schmid-Fetzer, F. Zhang, Y. Wang, Q. Gao, T. Zhou, J. Alloys Compd. 603, 100 (2014)
F.R. Elsayed, N. Hort, M.A. Salgado Ordorica, K.U. Kainer, Mater. Sci. Forum. Trans. Tech. Publ. 15, 65 (2011)
D. Tolnai, C. Mendis, A. Stark, G. Szakács, B. Wiese, K. Kainer, N. Hort, Mater. Lett. 102, 62 (2013)
M.A. Easton, M.A. Gibson, D. Qiu, S.M. Zhu, J. Gröbner, R. Schmid-Fetzer, J.F. Nie, M.X. Zhang, Acta Mater. 60, 4420 (2012)
S. Zhu, J. Nie, M. Gibson, M. Easton, Scr. Mater. 77, 21 (2014)
Z. Zhu, M.A. Gharghouri, A.D. Pelton, J. Chem. Thermodyn. 94, 43 (2016)
Acknowledgements
The authors acknowledge the Deutsches Elektronen-Synchrotron for the provision of facilities within the framework of the Proposal I-20150471 and the Deutsche Forschungsgemeinschaft for the funding in the framework of the Proposals TO817/4-1 and ME4487/1-1.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Gavras, S., Subroto, T., Buzolin, R.H. et al. The Role of Zn Additions on the Microstructure and Mechanical Properties of Mg–Nd–Zn Alloys. Inter Metalcast 12, 428–433 (2018). https://doi.org/10.1007/s40962-017-0174-3
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40962-017-0174-3