Influence of the Vibrations on AlSi10Mg Casting Alloy Structure

Abstract:

The goal of this paper is to analyze the influence of the mechanical vibrations during the casting on AlSi10Mg casting alloy structure. Seven samples were studied, solidified on vibrating field, using different frequencies and accelerations. After preparation, the structure was studied using optical microscope and SEM. The dimension of the Si phase was also measured. Through applying the vibrations during the crystallization, the fragmentation of the dendrites was accomplished by obtaining solid solution regions close to a spherical shape. These regions contain chemical compounds of a much smaller size than those resulting from static crystallization. The dimension of the Si phase is influenced by the presence of vibrations; increasing frequency will induce the decreasing of the Si phase size. The mathematical modelling of the frequency influence on the Si phase dimension is also presented.

• Periodical: Advanced Materials Research (Volume 1114)
• Pages: 166-171
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1114.166
• Online since: July 2015
• Authors: Mircea Horia Tierean*, Liana Sanda Baltes, Alexandru Banea
• Keywords: Aluminium Alloy, Microstructure, Solidification, Vibrations

References

[1] N. Abu-Dheir, M. Khraisheh, K. Saito, A. Male, Silicon morphology modification in the eutectic Al-Si alloy using mechanical mould vibration, Mater. Sci. Eng., A393, (2005), 109–117.

DOI: 10.1016/j.msea.2004.09.038

[2] P. Appendino, G. Crivellone, C. Mus, S. Spriano, Dynamic solidification of sand-cast aluminum alloys, Metallurgical Science and Technology, (2009), 7-32.

[3] G. Chirita, I. Stefanescu, D. Soares, F.S. Silva, Influence of vibration on the solidification behaviour and tensile properties of an Al–18 wt%Si alloy, Materials & Design, Volume 30, Issue 5, (2009), 1575-1580.

DOI: 10.1016/j.matdes.2008.07.045

[4] S. Gencalp, N. Saklakoglu, Effects of Low-Frequency Mechanical Vibration and Casting Temperatures on Microstructure of Semisolid AlSi8Cu3Fe, Arabian Journal for Science and Engineering, Volume 37, Issue 8, (2012), 2255-2267.

DOI: 10.1007/s13369-012-0316-0

[5] X. Jian, T.T. Meek, Q. Han, Refinement of eutectic silicon phase of aluminum A356 alloy using high-intensity ultrasonic vibration, Scripta Materialia 54 (2006), 893–896.

DOI: 10.1016/j.scriptamat.2005.11.004

[6] C. Limmaneevichitr, S. Pongananpanya, J. Kajornchaiyakul, Metallurgical structure of A356 aluminum alloy solidified under mechanical vibration: An investigation of alternative semi-solid casting routes, Materials & Design, volume 30, Issue 9, (2009).

DOI: 10.1016/j.matdes.2009.01.036

[7] N. Omura, Y. Murakami, M. Li, T. Tamura, K. Miwa, H. Furukawa, M. Harada, M. Yokoi, Effects of Mechanical Vibration on Macrostructure and Mechanical Properties of AC4C Aluminum Alloy Castings, Materials Transactions, Vol. 50, No. 11 (2009).

DOI: 10.2320/matertrans.f-m2009822

[8] F. Taghavi, H. Saghafian, Y.H.K. Kharrazi, Study on the effect of prolonged mechanical vibration on the grain refinement and density of A356 aluminum alloy, Materials and Design, 30 (2009), 1604–1611.

DOI: 10.1016/j.matdes.2008.07.032

[9] A.S. Banea, M.H. Tierean, Influence of vibrations on mechanical properties of AlSi10Mg cast, Metalurgia, no. 8, (2013), 23-29.