Supersaturation Behavior of Al Solid Solutions and its Effect on Tensile Property in Al-7Si-xMg Alloys during Solution Heat Treatment (x: 0.4 and 0.8 Mass%)


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Supersaturation behavior of Al solid solutions and its effect on tensile property in Al-7Si-0.4Mg and Al-7Si-0.8Mg alloys during solution heat treatment were investigated in this study. As a result of Mg solubility measurement for Al solid solitions after solution heat treatment for 6 hrs by electron probe micro analyzer (EPMA)-wavelength-dispersive X-ray spectroscopy (WDS), Al-7Si-0.8Mg alloy had the higher Mg solubility, about 0.55 mass%, corresponding to that of Al-Si-Mg ternary phase diagram. From the tensile test, Al-7Si-0.8Mg alloy showed the improved strength and similar elongation to that of Al-7Si-0.4Mg alloy.



Edited by:

Qing Liu, Jian-Feng Nie, Robert Sanders, Zhihong Jia and Lingfei Cao




S. H. Ha et al., "Supersaturation Behavior of Al Solid Solutions and its Effect on Tensile Property in Al-7Si-xMg Alloys during Solution Heat Treatment (x: 0.4 and 0.8 Mass%)", Materials Science Forum, Vol. 877, pp. 73-77, 2017

Online since:

November 2016




* - Corresponding Author

[1] W. Schneider, F.J. Feikus, Heat treatment of aluminium casting alloys for vacuum die casting, Light Metal Age, (1998) 22-38.

[2] D.R. Gunasegarama, M. Givord, R.G. O'Donnell, B.R. Finnin, Improvements engineered in UTS and elongation of aluminum alloy high pressure die castings through the alteration of runner geometry and plunger velocity, Mater. Sci. Eng. A, 559 (2013).


[3] E.J. Vinarcik, High integrity die casting processes, Jon Wiley & Sons Inc., New York, (2003).

[4] S. Gowri, F.H. Samuel, Effect of Alloying Elements on the Solidification Characteristics and Microstmcture of Al-Si-Cu-Mg-Fe 380 Alloy, Metall. Mater. Trans. A, 25 (1994) 437-448.


[5] C.H. Caceres, C.J. Davidson, J.R. Griffiths and Q.C. Wang, The effect of Mg on the microstructure and mechanical behavior of Al-Si-Mg casting alloys, Metall. Mater. Trans. A, 30 (1999) 2611-2618.


[6] C.H. Caceres, I.L. Svensson, J.A. Taylor, Strength-ductility behaviour of Al-Si-Cu-Mg casting alloys in T6 temper, Int. J. Cast Metals Res., 15 (2003) 531-543.


[7] J.Y. Hwang, R. Banerjee, H.W. Doty, M.J. Kaufman, The effect of Mg on the structure and properties of type 319 aluminum casting alloys, Acta Mater., 57 (2009) 1308-1317.


[8] M.S. Salleh, M.Z. Omar, J. Syarif, The effects of Mg addition on the microstructure and mechanical properties of thixoformed Al-5%Si-Cu alloys, J. Alloys Compd., 621 (2015) 121-130.


[9] H. Yang, S. Ji, W. Yang, Y. Wang, Z. Fan, Effect of Mg level on the microstructure and mechanical properties of die-cast Al-Si-Cu alloys, Mater. Sci. Eng. A, 642 (2015) 340-350.


[10] J. Gilbert Kaufman, Elwin L. Rooy, ASM International Materials Park, OH 44073-0002.

[11] D.B. Lee, High temperature oxidation of AZ31+0. 3 wt. % Ca and AZ31+0. 3 wt. % CaO magnesium alloys, Corros. Sci., 70 (2013) 243-251.


[12] J.W. Jeong, J.S. Im, K. Song, M. h. Kwon, S.K. Kim, Y.B. Kang, S. H. Oh, Transmission electron microscopy and thermodynamic studies of CaO-added AZ31 Mg alloys, Acta Mater., 61 (2013) 3267-3277.


[13] T.W. Lee, H.G. Kim, M.G. So, J.K. Lee, S.K. Kim, W.J. Park, W.Y. Kim, S.S. Kim, S.H. Lim, Microstructural evaluation of oxide layers in CaO-added Mg alloys, J. Alloys Compd., 635 (2015) 5-10.


[14] Y.O. Yoon, S.H. Ha, G.Y. Yeom, H.K. Lim, S.K. Kim, Oxidation behavior of Al2Ca added Al-5Mg alloy in the liquid state, Light Metals, 2013, TMS Annual Meeting, San Antonio, 2013, 323-326.


[15] S.J. Kim, S.K. Hyun, S.K. Kim and Y.O. Yoon, Effect of Al2Ca on eutectic Si modification of Al-7Si-0. 4Mg alloy, J. Korea Foundry Soc., 34 (2014) 248-253.

[16] E. Sjölander, S. Seifeddine, Artificial ageing of Al-Si-CuMg casting alloys, J. Mater. Process. Technol., 210 (2010) 1249-1259.

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