高性能金属结构材料激光增材制造技术研究进展

Laser additive manufacturing technology on high-performance metallic components has shown great potential and broad application prospects in the manufacturing of key equipment. Beihang University has conducted deep research on laser additive manufactured large metallic components and achieved many research breakthroughs. In this article, the progress of laser additive manufactured high-performance metal structural materials was summarized. The non-equilibrium solidification and nucleation growth behavior were revealed, and the active control method on grain morphologies of titanium alloys and nickel-based superalloys was established. Besides, new strengthening and toughening mechanisms for laser additive manufactured materials were proposed, while titanium alloy and ultra-high strength steel specially for additive manufacturing were developed. Future research interests will continue to focus on fundamental issues such as laser/metal interaction behavior, material solidification and phase transition laws, as well as the design and development of high-performance new alloys based on extreme metallurgical conditions of laser additive manufacturing. Thus, the transformative potential of laser additive manufacturing technology in the manufacturing of large metal components for key equipments can be further unleashed.