Influence of Different Si Levels on Mechanical Properties of Aluminium Casting Alloys

Year 2019, Volume: 3 Issue: 2, 165 - 172, 10.10.2019

Onur Ozaydin

Abstract

AlSi7
and AlSi11 are the most commonly used materials in aluminum alloy wheel
production. The main difference is the heat treatment application; for wheel
production AlSi7 is usually used in heat treated form while AlSi11 is not. Heat
treatment processes play a vital role on production costs. More than fifty
percent of aluminum wheels are heat treated however the exact value varies
between different manufacturers. Additional heat treatment costs directly
affect the competitiveness of the manufacturer. In this study the material
properties of an alternative Si level between AlSi7 and AlSi11 are examined and
the effects of these intermediate Si levels on mechanical properties are
compared with that of AlSi7 and AlSi11. The aim of this study to examine the
possibility of obtaining mechanical properties of heat treated AlSi7 with a
non-heat-treated material differing only in Si content. In this experiment all
processes and casting parameters for different material types are the same
except for the Si content. In addition to an experimental study, the mechanical
properties of the alternative material are simulated by utilizing a material
analysis software and these properties are compared with experimental results.
Thus, correlation between simulation and experimental study results can also be
examined. As a conclusion, the alternative non-heat-treated material is
presented to manufacturers. These results may be used to bypass the heat
treatment process and to decrease the cost of final product.

Keywords

Aluminum, Heat Treatment, Mechanical Properties, Simulation of Material Properties

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