【摘要】 铝因其性能优异而被广泛应用于多个领域。为进一步满足复杂需求，TiB₂增强铝基复合材料因其结合增强体高强度、高弹性模量的特点，能进一步提高材料的强度和硬度等力学性能指标。通过引入2%、4%质量分数TiB₂的颗粒，比对其对激光选区熔化（SLM）成形AlSi12合金致密度、显微组织、力学性能的影响。结果表明，当激光功率为250 W、扫描速度为1200 mm/s、扫描间距为60μm、层厚为40μm时，质量分数为2%TiB₂的复合材料试样的致密度以及力学性能较优，成形质量最佳。此外，SLM成形TiB₂/AlSi12试样的性能均优于传统铸造工艺成形的AlSi12材料。通过引入适当比例的增强体，可以有效提升铝合金材料的性能，并改善SLM成形铝合金材料的成形质量。更多还原

【Abstract】 Aluminum is widely used because of its excellent performance. To further meet complex requirements, TiB₂-reinforced aluminum matrix composites can improve the mechanical properties, such as strength and hardness, of the material. This is due to their high strength and high elastic modulus of the reinforcing body. We studied the effects of introducing 2% and 4% TiB₂ particles on the density, microstructure, and mechanical properties of AlSi12 alloy formed by selective laser melting（SLM）. The results show that under the conditions of a laser power of 250 W, a scanning speed of 1200 mm/s, a scanning spacing of 60 μm, and a layer thickness of 40 μm, the composite material sample with a 2% TiB₂ mass fraction has better density and mechanical properties, as well as the best forming quality. In addition, the performance of TiB₂/AlSi12 specimens formed by SLM is superior to that of AlSi12 materials formed by traditional casting processes. Introducing an appropriate amount of reinforcement can effectively improve the performance of aluminum alloy materials and enhance the forming quality of SLMformed aluminum alloy materials.更多还原