Metal additive manufacturing (AM) has transformed conventional manufacturing processes by offering unprecedented opportunities for design innovation, reduced lead times, and cost-effective production. Aluminum alloy, a material used in metal 3D printing, is a representative lightweight structural material known for its high specific strength and corrosion resistance. Consequently, there is an increasing demand for 3D printed aluminum alloy components across industries, including aerospace, transportation, and consumer goods. To meet this demand, research on alloys and process conditions that satisfy the specific requirement of each industry is necessary. However, 3D printing processes exhibit different behaviors of alloy elements owing to rapid thermal dynamics, making it challenging to predict the microstructure and properties. In this study, we gathered published data on the relationship between alloy composition, processing conditions, and properties. Furthermore, we conducted a sensitivity analysis on the effects of the process variables on the density and hardness of aluminum alloys used in additive manufacturing.

In the flux used in the batch galvanizing process, the effect of the component ratio of NH₄Cl to ZnCl₂ on the microstructure, coating adhesion, and corrosion resistance of Zn-Mg-Al ternary alloy-coated steel is evaluated. Many defects such as cracks and bare spots are formed inside the Zn-Mg-Al coating layer during treatment with the flux composition generally used for Zn coating. Deterioration of the coating property is due to the formation of AlClx mixture generated by the reaction of Al element and chloride in the flux. The coatability of the Zn-Mg-Al alloy coating is improved by increasing the content of ZnCl2 in the flux to reduce the amount of chlorine reacting with Al while maintaining the flux effect and the coating adhesion is improved as the component ratio of NH4Cl to ZnCl2 decreases. Zn-Mg-Al alloy-coated steel products treated with the optimized flux composition of NH₄Cl•3ZnCl₂ show superior corrosion resistance compared to Zn-coated steel products, even with a coating weight of 60 %.

Phase contents and elemental composition of ultradispersed powders obtained by the electrical explosion of tin-leadalloy powders are investigated. It is demonstrated that during the explosion and subsequent cooling, surface layers of powder particles are enriched in lead compared to the initial alloy. The thermal stability of powders oxidizing in air is also investigated.

니켈-수소화물전지의 음극재료로서 주목을 받고 있는 다원계 Zr기 Laves 합금의 조성에 따른 결정구조, 방전특성등을 조사하였다. 전극은 아크 용해한 합금을 분쇄한 분말과 PVA를 다공성니켈 foam에 충진하여 제작하였고 충방전시험은 6M KOH 용액중에서 수행하였다. 대상 합금은 ZrNi2를 기본조성으로 하여 이중 Ni의 일부를 V, Mn, Cr, Mo 또는 W로 치환한 삼원계 및 사원계 합금이었다. 이들 합금의 충방전 실험결과 ZrV0.5Mn0.5Ni1.0의 경우가 260 mAh/g로 가장 높은 방전용량을 나타내었다. 이 합금의 방전용량은 방전전류밀도의 영향을 크게 받았으며 10 mA/g과 200mA/g의 방전전류에서 각각 300mAh/g와 150mAh/g이었다. 이 합금을 1100˚C에서 열처리한 경우 저율방전시에는 방전용량의 변화가 거의 없었으나 수소의 확산이 율속이 될 것으로 생각되는 고율 방잔시에서는 방전용량이 현저하게 감소하였다. 이러한 현상은 열처리에 의해 수소의확산을 용이하게 해주는 격자결함이 감소하기 때문이 아닌가 생각된다.