Abstract
The microstructure of high-pressure die casting (HPDC) product directly influences its mechanical properties. The aim of this article is to evaluate the effect of the fast-shot speed on the microstructure for two geometric variants of the casting. Material used in the experiment will be a commonly known AlSi9Cu3(Fe) alloy. For experimental purposes, numerical simulations, microstructural analysis, SDAS index, and length of eutectic Si plates measurement will be implemented. The simulations have shown the possibility of air being entrained in the cold chamber. Oxides, and consequently microporosity, were predicted, which led to the selection of critical points of the casts chosen for further observation and evaluation. With the use of optical and scanning microscope, fast-shot speed value of 3.6 m.s−1 was selected as the most advantageous.
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