This study investigated the growth behavior and characteristics of compounds formed at the interface between a liquid Al-Si-Cu alloy and solid cast iron. Through microstructural analyses, it was observed that various AlFe and AlFeSi phases are formed at the interface, and the relative proportion of each phase changes when small amounts of strontium are added to the Al alloy. The results of the microstructural analysis indicate that the primary phases of the interfacial compounds in the Al-Si-Cu base alloy are Al8Fe2Si and Al4.5FeSi. However, in the Sr-added alloys, significant amounts of binary AlFe intermetallic compounds such as Al5Fe2 and Al13Fe4 formed, in addition to the AlFeSi phases. The inclusion of Sr has a slight diminishing effect on the rate at which the interfacial compounds layer thickens during the time the liquid Al alloy is in contact with the cast iron. The study also discusses the nano-indentation hardness and micro-hardness of the interfacial phases.

In order to broaden the range of application of light weight aluminum alloys, it is necessary to enhance the mechanical properties of the alloys and combine them with other materials, such as cast iron. In this study, the effects of adding small amounts of Cu and Zr to the Al-Si-Mg based alloy on tensile properties and corrosion characteristics were investigated, and the effect of the addition on the interfacial compounds layer with the cast iron was also analyzed. Although the tensile strength of the Al-Si-Mg alloy was not significantly affected by the additions of Cu and Zr, the corrosion resistance in 3.5 %NaCl solution was found to be somewhat lowered in this research. The influence of Cu and Zr addition on the type and thickness of the interfacial compounds layer formed during compound casting with cast iron was not significant, and the main interfacial compounds were identified to be Al5FeSi and Al8Fe2Si phases, as in the case of the Al-Si-Mg alloys.

Al-Cu-Mn 주조합금의 피로성질에 미치는 Cd 첨가의 영향을 저주기 및 고주기 피로시험을 통하여 조사하였다. Cd 첨가량이 증가함에 따라 피로수명이 증가하였으며, 인장강도도 증가하였다. 고주기 피로시험결과 피로강도는 115MPa이었으며 피로비는 0.31이었다. 피로시험 결과 균열이 표면에서 발생하여 입계를 따라 전파되었는데 이러한 입계파괴는 입계를 따라 존재하는 무석출대의 영향으로 생각된다. 인장강도값은 Cd이 첨가되지 않았을 경우 330MPa이었으나 0.15%의 Cd이 첨가됨으로써 401MPa 까지 증가되었다.