高熵合金在激光增材修复中研究应用进展

Research and application progress of high entropy alloy materials in laser additive repair

将新兴高熵合金材料引入激光增材修复的先进智能制造之中,有望推动新一代材料与制造技术的深度融合发展,大幅提高原材料和能量的利用率,具有广泛的应用领域和极好的发展前景。本文介绍了高熵合金在激光增材修复中的应用现状,指出强度塑性有待提高、调控工艺有待优化、强化机理有待明确是高熵合金在激光增材修复中拓展应用解决的关键科学问题。探究高熵合金熔覆涂层金属强韧化机制,明确熔覆涂层的材料、工艺、组织结构和宏观性能之间基本对应关系,获取完整有效的高熵合金成分预测方法,创新合金体系设计、优化调整控制工艺,获得适用于极端服役环境且成本低廉的高性能熔覆涂层是未来的主要研究热点和发展趋势。

Introducing emerging high entropy alloys materials into advanced intelligent manufacturing for laser additive repair is expected to promote the deep integration of new generation of materials and manufacturing technology and greatly improve the utilization of raw materials and energy,which have broad application fields and excellent development prospects.This paper introduces the application status of high entropy alloys in laser additive repair,and points out that the mismatch of strength and toughness,inaccurate performance control and unclear strengthening mechanism are the key scientific problems that need to be solved urgently in the expansion and application of high entropy alloys in laser additive repair.Exploring the ductile-brittle transition mechanism of the high entropy alloys cladding coating metal,clarifying the basic mapping relationship among the materials,processes,microstructure and coating performance of cladding coatings,obtaining a complete and effective method for predicting the composition of high entropy alloys,innovating the design of alloy powder system,optimizing and adjusting the control processes,and obtaining a high-performance cladding coating suitable for extreme service environment and with low cost are the main research focus and development trends in the future.