激光选区熔化制备高熵合金的研究进展

Progress of the research on high-entropy alloys prepared by laser selective melting

高熵合金因其独特性能优势,使其在航空航天、船舰等领域有着巨大的潜在应用。传统熔炼等制备方式难以满足高自由度设计、低成本等工业化需求。激光选区熔化作为一种典型的增材制造技术,具有高近净成形能力,在制备复杂金属零部件方面存在巨大潜力。本文介绍了高熵合金粉体的制备方式,激光选区熔化制备高熵合金的基本原理及优势特点。归纳总结了国内外关于激光选区熔化制备高熵合金的工艺参数优化、组织性能及后处理工艺研究。指出了解决大尺寸零部件制备、原位合金化研究是激光选区熔化制备高熵合金的下一步发展趋势。

High-entropy alloys have great potential applications in aerospace,shipbuilding,and other fields due to their unique performance advantages.Meeting the needs of industrialization,such as designs with a high degree of freedom and low cost,through traditional melting and other preparation methods is difficult.Laser selective melting,a typical additive manufacturing technology with high near-net forming capability,has great potential for the preparation of complex metal parts.This work introduces the preparation of high-entropy alloy powder and the basic principle and advantageous features of high-entropy alloys prepared through laser selective melting.The optimization of process parameters,microstructural properties,and post-treatment processes of laser selective melting for the preparation of high-entropy alloys at home and abroad are summarized.Addressing the preparation of large parts and in-situ alloying research are the next developmental trend of laser selective melting for preparing high entropy alloys.