Evaluation of Sb effect onto eutectic Si changes and mechanical properties in an 4xxx Al cast alloys series

The purpose of this article is to examine the effect of modifier based on AlSb10 on the structure and mechanical properties o f the AlSi7Mg0.3 and AlSi6Cu4 cast alloys. The changes of these parameters were studied on samples in untreated states (without heat treatment). Structural changes were studied on light and scanning electron microscope s . Several types of e tching were used, which included norm al black and white etching (0.5 % HF), colour etching (Weck - Al) and deep etching (HCl), for studying structural parameters morphology. The influence of modifier on mechanical properties (UTS, Brinell hardness test) was studied at room temperature. The p resent work shows that the antimony has not had a significant effect on mechanical properties (UTS, Brinell hardness test), but structural parameters were changed.