选区激光熔化3D打印钛合金及其复合材料研究进展

As a kind of rising additive manufacturing technology in recent years, selective laser melting (SLM) 3D printing technology has significant advantages and broad prospects in key and complex structural components of high-performance titanium alloys and titanium matrix composites for aerospace, national defense, and biomedical applications. The microstructure of titanium alloys produced by SLM mainly consists of fine acicular α'martensites while in situ nanoscale TiBw and TiCp ceramic reinforcement phase can be formed in the SLM process of titanium matrix composites. As a result, the components produced by SLM 3D printing technology show better mechanical properties than those of casting and powder metallurgy. Based on the introduction of the principles and features of SLM 3D printing technology, this paper mainly reviews the basic research and engineering application progress on SLM 3D printing of titanium alloys and titanium matrix composites, and looks into prospects of the related key basic science and technology problems.