Effect of High Temperature Exposure on the Mechanical Properties of Self-Hardening Al-Based Alloy

Abstract:

Cost-effective, modified, self-hardening Al-based alloy is proposed for automotive and aircraft industries. AlZn10Si8Mg is produced by permanent mould casting technique, and the obtained material is re-melted to refine and modify its microstructure and to develop a mechanically more efficient alloy. Ti as grain refiner, in form of TiB, and modifier, in forms of AlSr, were added to the basic alloy composition. Microstructural analysis and impact toughness evaluation were performed at room temperature and up to 180°C. The results obtained confirm that the proposed alloy reveal good properties in the considered temperature range, and demonstrate their applicability for structural components development in the aforementioned areas and in a wide range of temperature.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 1489-1494
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.1489
• Online since: November 2016
• Authors: Ildiko Peter*, Christian Castella, Silvia Lombardo, Mario Rosso
• Keywords: Mechanical Properties, Microstructure, Self-Hardening Al Alloy

References

[1] E. Tillová, E. Ďuriníková, M. Chalupová, Structural analysis of secondary AlZn10Si8Mg cast alloy, Acta Metallurgica Slovaca, 17 (2011) 4-10.

DOI: 10.21062/ujep/x.2011/a/1213-2489/mt/11/1/11

[2] I. Peter, M. Rosso, C. Castella, R. Molina, Self-hardening alloys for automotive application, Materials Science Forum, 794-796 (2014) 1221-1226.

DOI: 10.4028/www.scientific.net/msf.794-796.1221

[3] W. Schneider, M.A. Kearns, M.J. McGarry, A.J. Whitehead, Comparison oft he behaviour of AlTiB and AlTiC grain refiners, Proceedings of the 1997 127th TMS Annual Meeting, (1998),  953-961.

DOI: 10.1002/9781118647783.ch49

[4] A. Banerji, W. Reif, Grain refining of aluminum by TiC, Metall Trans A, 11 (1985) 2065–(2068).

DOI: 10.1007/bf02662410

[5] M. Rosso, I. Peter, C. Castella, S. Lombardo, Grain refinement of self-hardening aluminum alloys, TSM, (2015).

DOI: 10.1002/9781119274780.ch118

[6] A. Pacz, U.S. Patent 1, 860, 947. (1932).

[7] A. Pacz, U.S. Patent 1, 387, 900 A. (1921).

[8] S. Hegde, K.N. Prabhu, Modification of eutectic silicon in Al-Si alloys, Journal of Material Science, 43 (2008) 3009-3027.

DOI: 10.1007/s10853-008-2505-5

[9] C.W. Onyial, B.A. Okorie , S.I. Neife2, C.S. Obayi, Structural Modification of Sand Cast Eutectic Al-Si Alloys with Sulfur/Sodium and Its Effect on Mechanical Properties, World Journal of Engineering and Technology, 1 (2013) 9-16.

DOI: 10.4236/wjet.2013.12002

[10] D.R. Hamilton and R.G. Seidensticker, J Appl Phys, 31(1960) 1165.

[11] M. Timple, N. Wanderka, R. Schlesiger, T. Yamamoto, N. Lazarev, D. Isheim, G. Schmitz, S. Matsumura, J. Banhart, The role of strontium in modifying aluminium–silicon alloys, Acta Mater., 60 (2012) 920–3928.

DOI: 10.1016/j.actamat.2012.03.031

[12] M. Timpel, N. Wanderka, R. Schlesiger, T. Yamamoto, D. Isheim, G. Schmitz, S. Matsumura, J. Banhart, Sr-Al-Si co-segregated regions in eutectic Si phase of Sr-modified Al-10Si alloy, 53th International Field Emission Symposium (IFES 2012), Tuscaloosa, USA Ultramicroscopy 132 (2013).

DOI: 10.1016/j.ultramic.2012.10.006

[13] J. Campbell: Castings, 1st ed., Elsevier, Oxford, (1991).

[14] D. Dispinar, J. Campbell, International Journal of cast metal research, 17 (2004) 280-286.

[15] X. Chen, H. Geng, Y. Li, Study on the eutectic modification level of Al–7Si Alloy by computer aided recognition of thermal analysis cooling curves, Mater. Sci. Eng. A, 419 (2006) 283–289.

DOI: 10.1016/j.msea.2005.12.036