This work investigated the phase formation, thermal stability, and mechanical behavior of a metastable quasicrystal-forming Al₉₅Fe₂Cr₂Ti₁ alloy prepared by selective laser melting (SLM). The powder of this alloy was obtained by gas atomization using recycled material (Al cans) which brings several economic and social advantages. It showed chemical composition, particle size distribution, flowability, and morphology adequate for the SLM process. Samples were produced by SLM in different build directions (0°, 45°, and 90°) with a high relative density of 99.3–99.8%. SLM processing of quasicrystal-forming Al₉₅Fe₂Cr₂Ti₁ powder led to the formation of a microstructure including the presence of nm-sized quasicrystalline precipitates in a dendritic α-Al matrix mainly in the center of the molten pool while the heat-affected zones showed coarser but also nanometric quasicrystalline and crystalline phases. Similar phase formation and hardness of 180.33 HV were observed at the top and bottom of the samples, independent of the build direction. Due to the formation of ultrafine precipitates and refined grains the samples exhibited a high compressive strength at room temperature and 400 °C. The material exhibited a remarkable 140 ± 13 MPa yield strength along with extensive compression ductility at 400 °C, which is higher than what is observed for AlSi SLMed alloys and conventionally processed high-temperature Al alloys. These results show a new opportunity to fabricate higher-performance high-temperature quasicrystal-forming alloys with freedom of geometry design and lower cost.

这项工作研究了通过选择性激光熔融（SLM）制备的亚稳态准晶体形成Al ₉₅ Fe ₂ Cr ₂ Ti ₁合金的相形成，热稳定性和机械性能。该合金的粉末是使用回收材料（铝罐）通过气体雾化获得的，带来了许多经济和社会优势。它显示出足以用于SLM工艺的化学成分，粒度分布，流动性和形态。通过SLM在不同的构建方向（0°，45°和90°）上生成的样品具有99.3–99.8％的高相对密度。准晶体形成的Al ₉₅ Fe ₂ Cr ₂ Ti _1的SLM处理粉末导致形成了微观结构，包括主要在熔池中心的树枝状α-Al基体中存在纳米级的准晶体沉淀物，而受热影响的区域则显示出较粗糙的纳米准晶相和结晶相。在样品的顶部和底部观察到相似的相形成和180.33 HV的硬度，与生成方向无关。由于形成了超细的析出物和细化的晶粒，因此样品在室温和400°C下表现出较高的抗压强度。该材料在400°C时表现出出色的140±13 MPa屈服强度和广泛的压缩延展性，高于AlSi SLM合金和常规加工的高温铝合金。