Development of New Oxide Based Master Alloys and their Grain Refinement Potency in Aluminium Alloys


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In this study, grain refinement efficiency of a new oxide master alloy based on MgAl2O4 was demonstrated in Al alloys. The grain size of the reference alloy was reduced by 50-60% with the addition of the master alloy and introduction of ultrasonic cavitation. While cooling rate has an influence on the grain size reduction, higher levels of addition of master alloy was found to be not effective in further reducing the grain size.



Materials Science Forum (Volumes 828-829)

Edited by:

H.K. Chikwanda and S. Chikosha




V. M. Sreekumar et al., "Development of New Oxide Based Master Alloys and their Grain Refinement Potency in Aluminium Alloys", Materials Science Forum, Vols. 828-829, pp. 23-28, 2015

Online since:

August 2015




* - Corresponding Author

[1] D.G. McCartney, Grain refining of aluminium and its alloys using inoculants, Int. Mater. Rev., 34 (1989) 247-60.

[2] B.S. Murty, S.A. Kori, and M. Chakraborty, Grain refinement of aluminium and its alloys by heterogeneous nucleation and alloying, Int. Mater. Rev., 47 (2002) 3–29.


[3] K.T. Kashyap and T. Chandrasekhar, Effects and mechanisms of grain refinement in aluminium alloys, Bull. Mater. Sci., 24 ( 2001) 345–353.

[4] M. Easton and D. StJohn, Grain refinement of aluminum alloys: Part I. The nucleant and solute paradigms. A review of the literature, Metall. Mater. Trans. A, 30A (1999) 1613-1623.


[5] P.S. Mohanty, J.E. Gruzleski, Mechanism of grain refinement in aluminium, Acta Met. Mater., 43 (1995) 2001-(2012).

[6] P. Schumacher and A.L. Greer, Enhanced heterogeneously nucleated α-Al in amorphous Aluminium alloys, Mater. Sci. Eng. A, 178 (1994) 309-313.


[7] F. Wang , Z. Liu, D. Qiu, J. A. Taylor, M. A. Easton, M. X. Zhang, Revisiting the role of peritectics in grain refinement of Al alloys, Acta Mater., 61 (2013) 360–370.


[8] Y. Birol, Production of Al–Ti–B master alloys from Ti sponge and KBF4, J. Alloys Comp., 440 (2007) 108–112.


[9] V.H. Lopez, A. Scoles, A.R. Kennedy, The thermal Stability of TiC particles in an Al7wt%Si Alloy, Mater. Sci. Eng. A, 356 (2003) 316–325.


[10] A. L. Greer, Grain refinement of alloys by inoculation of melts, Phil. Trans. R. Soc. Lond. A, 361 (2003) 479-495.

[11] G.I. Eskin, Ultrasonic treatment of light alloy melts, Gordon and Breach Science Publishers, Amsterdam, The Netherlands, 1998, p.18–60, 135–85, 229–40.

[12] T.V. Atamanenko, D.G. Eskin, L. Zhang, and L. Katgerman, Criteria of grain refinement Induced by ultrasonic melt treatment of aluminum alloys containing Zr and Ti, Metall. Mater. Trans. A, 41A (2010) 2056-(2066).


[13] H. -T. Li , Y. Wang, Z. Fan, Mechanisms of enhanced heterogeneous nucleation during solidification in binary Al–Mg alloys, Acta Mater., 60 (2012) 1528–1537.


[14] O.V. Abramov, Ultrasound in liquid and solid Metals, CRC Press, Boca Raton, FL, 1994, p.43–77, 273–406.

[15] V.M. Sreekumar , N. Hari Babu, D. G. Eskin, Z. Fan, Grain refinement efficiency of a new oxide containing master alloy for aluminium casting alloys. Mater. Sci. Forum 794-796 (2014) 155-160.


[16] R. Schweinfest, S. Köstlmeier, F. Ernst, C. Elsäser, T. Wagner, M. W. Finnis, Atomistic and electronic structure of Al/MgAl2O4 and Ag/MgAl2O4 interfaces, Phil. Mag., 81.


[4] (2001) 927-955.

[17] Z.P. Luo, Crystallography of SiC/MgAl2O4/Al interfaces in a pre-oxidized SiC reinforced SiC/Al composite. Acta Mater. 54 (2006) 47–58.


[18] T.E. Quested, A.L. Greer, Grain refinement of Al alloys: Mechanisms determining as-cast grain size in directional solidification. Acta Mater., 53 (2005) 4643–4653.


[19] G. Wang, M.S. Dargusch, M. Qian, D. G. Eskin, D. H. StJohn, The role of ultrasonic treatment in refining the as-cast grain structure during the solidification of an Al–2Cu alloy, J. Crys. Growth., 8 (2014) 119–124.


[20] V.M. Sreekumar , N. Hari Babu, D. G. Eskin, Z. Fan, Structure-Property analysis of in-situ Al-MgAl2O4 Metal Matrix Composites synthesized using ultrasonic cavitation, Mater. Sci. Eng. A 628 (2015) 30-40.


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