A Change of Mechanical Properties of the Self-hardening UNIFONT 90 Due to Temperature

L. KUCHARIKOVÁ; E. TILLOVÁ; M. CHALUPOVÁ; M. MAZUR

doi:10.21741/9781945291814-24

A Change of Mechanical Properties of the Self-hardening UNIFONT 90 Due to Temperature

MAZUR Magdalena, KUCHARIKOVÁ Lenka, TILLOVÁ Eva, CHALUPOVÁ Mária

Abstract. UNIFONT 90 is aluminum cast alloy used for engine and vehicle constructions, hydraulic units and mold making without heat treatment (self-hardening alloy). When using this alloy for high-temperature castings, it is necessary to study its structure and mechanical properties depending on the temperature. The contribution describes the effect of temperature in the range from – 196 °C up to + 400 °C on mechanical properties (especially Brinell hardness and bending impact toughness) of the UNIFONT 90. The mechanical properties were measured on samples after cooling and heating for holding 20 minutes at temperature. Fracture surfaces and changes in microstructure of material were evaluated by means of light microscopy and scanning electron microscopy (SEM). The results showed that with increasing temperature, the material was more plastic and making corresponding fracture surface.

Keywords
Self-Hardened Aluminum Alloy, UNIFONT 90, Mechanical Properties, Temperature Effect, Morphology of Microstructural Components

Published online 7/16/2018, 6 pages
Copyright © 2018 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: MAZUR Magdalena, KUCHARIKOVÁ Lenka, TILLOVÁ Eva, CHALUPOVÁ Mária, ‘A Change of Mechanical Properties of the Self-hardening UNIFONT 90 Due to Temperature’, Materials Research Proceedings, Vol. 5, pp 136-141, 2018

DOI: https://dx.doi.org/10.21741/9781945291814-24

The article was published as article 24 of the book Terotechnology

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] J. L. Cavazos, R. Colás, Quench sensitivity of a heat treatable aluminum alloy, Materials science and engineering A363 (2003) 171-178.
[2] J.S. Robinson, W. Redington, The influence of alloy composition on residual stresses in heat treated aluminum alloys, Materials Characterization 105 (2015) 47-55.
[3] M. Rosso, I. Peter, C. Castella, R. Molina, Optimization of composition for self-hardening AlZn10Si8Mg alloys, Materials today: Proceedings 2 (2015) 4949-4956.
[4] T. Lipiński, The structure and mechanical properties of Al-7%SiMg alloy treated with a homogeneous modifier, Applied Crystallography XXI Book Series: Solid State Phenomena 163 (2010) 183-186.
[5] R. Ulewicz, P. Szataniak, F. Novy, Fatigue properties of wear resistant martensitic steel, METAL 2014: 23rd International conference on metallurgy and materials (2014) 784-789.
[6] T. Dokšanocić, I. Džeba, D. Markulak, Variability of structural aluminum alloys mechanical properties, Structural safety 67 (2017) 11-26.E.
[7] S. Liu, Q. Li, H. Lin, L. Sun, T. Long, L. Ye, Y. Deng, Effect of quench-induced precipitation on microstructure and mechanical properties of 7085 aluminum alloy, Materials and Design 132 (2017) 119-128.
[8] N. Berndt, P. Frint, M. Bӧhme, M. F.-X. Wagner, Microstructure and mechanical properties of an AA6060 aluminum alloy after cold and warm extrusion, Materials Science and Engineering A 707 (2017) 717-724.
[9] S. Li, H. Dong, L. Shi, P. Li, F. Ye, Corrosion behavior and mechanical properties of Al-Zn-Mg aluminum alloy, Corrosion Science 123 (2017) 243-255.
[10] E. Ďuriníková, E. Tillová, M. Chalupová, Phase and structure characteristics of recycled AlZn10Si8Mg cast alloy, Manufacturing technology 11 (2011) 11-17.
[11] E. Rincón, H. F. López, M. M. Cisneros, H. Mancha, M.A. Cisneros, Effect of temperature on the properties of an as-cast aluminum alloy A319, Materials science and engineering A 453-453 (2007) 682-687.
[12] F.C. Porter, Zinc Handbook: Properties, processing, and use in design. Madison Avenue, New York, 1991.
[13] A. Dudek, B. Lisiecka, B, R. Ulewicz, The effect of alloying method on the structure and properties of sintered stainless steel, Archives of Metallurgy and Materials 62(1) 2017, pp.281-287.