INVESTIGATION OF THE STRAIN RATE SENSITIVITY OF Mg-6Sn AND Mg-6Sn-3Y ALLOYS

This study reports the influence of the addition of Yttrium (wt.3%) on strain-rate sensitivity of Mg-6Sn alloy. The Mg-6Sn and Mg-6Sn-3Y alloys were made by using high pressure die-cast. The microstructural and X-ray diffraction results exhibited that the Sn3Y5 and MgSnY intermetallic phases were formed with addition of Y to the Mg-6Sn alloy. Furthermore, the grain structure of the Mg-6Sn alloy was changed from dendritic to globular with addition of Y. The strain-rate sensitivity value of the Mg-6Sn-3Y alloy is found higher than that of the Mg-6Sn alloy for all strain value. This result was attributed to the formation of new intermetallics (Sn3Y5 and MgSnY) and microstructure morphology (from dendritic structure to globular).

Keywords:

Mg-Sn alloy, high pressure die casting, yttrium strain-rate sensitivity,

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[1] Yang, H.P., Fu, M.W., To, S., Wang, G.C., (2016), Investigation on the maximum strain rate sensitivity (m) superplastic deformation of Mg-Li based alloy Mater. and Design 112, 151-159. http://dx.doi.org/10.1016/j.matdes.2016.09.066
[2] Nan, X.L., Wang, H.Y., Wu, Z.Q., Xue, E.S., Zang, L., Jiang, Q.C., (2013), Effect of c/a ratio on Schimd Factors in Hexagonal close-packed metals, Scrip. Mater. 68, 530-533. http://dx.doi.org/10.1016/j.scriptamat.2012.12.006
[3] Pekgüleryüz, K. U. Kainer, A.A. Kaya, first ed., Woodhead Publishing Limited, Philadelphia, (2013).
[4] Friedrich, B. Mordike, Springer, Verlag Berlin Heilderberg (2006).
[5] Sandlöbes, S., Zaefferer, S., Schestakow, I., S. Yi, Gonzalez-Martinez, R., (2011), On the role of non-basal deformation mechanisms for the ductility of Mg and Mg–Y alloys Acta Mater. 59, 429-439. Doi:10.1016/j.actamat.2010.08.031.
[6] Han, G., H.K. Park, H.K. Kim, T.S. (2012), Local and global deformation behaviour in rolled pure magnesium sheets at room temperature under different strain rates Mater. Sci. and Eng. A 762, 138110. https://doi.org/10.1016/j.msea.2019.138110
[7] Valle, J.A., Rauno O.A., (2006), Influence of the grain size on the strain rate sensitivity in an Mg-Al-Zn alloy at moderate temperatures, Scrip. Mater. 55, 775-778. Doi:10.1016/j.scriptamat.2006.07.013
[8] Matsunaga, T., H. Somekawa, H. Hongo, Tabuchi M., (2015), Deformation mechanism transition with strain rate in Mg-3Al-1Zn alloy, Mater. Sci. and Eng. A 647, 212-215. http://dx.doi.org/10.1016/j.msea.2015.09.029.
[9] Song, W.Q., Beggs P., Easton M., (2009), Compressive strain-rate sensitivity of magnesium-aluminum die casting alloys, Mater. Des. 30. 642-648. Doi:10.1016/j.matdes.2008.05.050.
[10] Wang, H.Y., E.S. Xue, X.L. Nan, T. Yue, Y.P. Wang, Q.C. Jiang,( (2013), Influence of grain size on strain rate sensitivity in rolled Mg–3Al–3Sn alloy at room temperature Scrip. Mater. 68, 229-232. http://dx.doi.org/10.1016/j.scriptamat.2012.10.019.
[11] Stanford, N., I. Sabirov, G. Sha, A. Fontaine, S.P. Ringer, M.R. Barnett, (2010), Effect of Al and Gd solutes on the strain rate sensitivity of Mg alloys, Metal. and Trans., 41, 734-743. doi: 10.1007/s11661-009-0107-8
[12] Ang, H.Q., Zhu S., Abbott T., D. Qiu, Easton M., (2017), Strain-rate sensitivity of die-cast magnesium-aluminium based alloys Mater. Sci. and Eng. A. 699, 239-246. http://dx.doi.org/10.1016/j.msea.2017.05.093.
[13] Yarkadaş, G., C. Kumruoğlu, H. Şevik, (2018), The effect of Cerium addition on microstructure and mechanical properties of high pressure die cast Mg-5Sn alloy, Mater. Charc.136, 152-156. https://doi.org/10.1016/j.matchar.2017.11.057.
[14] Liu, H., Y. Chen, Y. Tang, S. Wei, G. Niu, (2007), The microstructure, tensile properties, and creep behavior of as-cast Mg–(1–10)%Sn alloys J. Alloys and Comp. 440, 343-351. Doi:10.1016/j.jallcom.2006.09.024.
[15] Zhou, Y., P. Wu, Y. Yang, D. Gao, P. Feng, C. Gao, H. Wu, Y. Liu, H. Bian, C. Shuai, (2006), The microstructure, mechanical properties and degradation behaviour of laser-melted Mg-Sn alloys, J. Alloys and Comp. 687, 109-114. http://dx.doi.org/10.1016/j.jallcom.2016.06.068.
[16] Nayyeri, G., R. Mahmudi, (2010), Effects of Sb additions on the microstructure and impression creep behavior of a cast Mg–5Sn alloy J. Mater. Sci. and Eng. A. 527, 669-678. Doi:10.1016/j.msea.2009.08.056.
[17] Qing, W., C. Yungui, X. Sufen, Z. Xiaoping, T. Yongbai, W. Shanghai, Z. Yuanghua, ,(2010), Study on microstructure and mechanical properties of as-cast Mg-Sn-Nd alloy, J. of Rare Earth. 28, 790-793. doi:10.1016/S1002-0721(09)60202-7.
[18] ASM handbook, Alloy Phase Diagrams, Volume 3, p. 1111.
[19] Muthuraja, C., A. Akalya, R. Ahmed, J. Nampoothiri, I. Balasundar, K.R., (2017), Experimental investigation and thermodynamic calculation of the phase equilibria in the Mg-rich region of Mg-Sn-Y alloy, J. of All. and Comp. 695, 3559-3572. http://dx.doi.org/10.1016/j.jallcom.2016.11.413.
[20] Chun, Y.B., C.H.J. Davies, (2011), Twinning-induced negative strain rate sensitivity in wrought Mg alloy AZ31 Mater. Sci. and Eng. A 528, 5713-5722. Doi:10.1016/j.msea.2011.04.059.
[21] Karimi, E., A. Hanzaki, M. Pishbin, H. Abedi, P. Changizian. (2013), Instantaneous strain rate sensitivity of wrought Mg alloys Mater. Design 49, 173-180. http://dx.doi.org/10.1016/j.matdes.2013.01.068
[22] Somekawa, H., A. Singh, R. Sahara, T. (2018), Excellent room temperature deformatibility in high strain rate, Sci. Rep. 656, 198-208. Doi:10.1038/s41598-017-19124-w.
[23] Lü, Y., Q. Wang, X. Zeng, W. Ding, C. Zhai, Y. Zhu, (2000), Effect of grain size distribution and texture on the cold extrusion behavior and mechanical properties of AZ31 Mg alloy, Materials Science and Engineering: A, 528 (9), 3428-3434.
[24] Wang, H., P. Wu, S. Kurukuri, M. J. Worswick, Y. Peng, D. Tang, D. Li, (2008), Strain rate sensitivities of deformation mechanisms in magnesium alloys. International Journal of Plasticity, 107, 207-222. https://doi.org/10.1016/j.ijplas.2018.04.005.