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

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


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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.

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: http://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.

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