合金组元与含量对激光熔覆高熵合金涂层的影响研究综述?

高熵合金被视为是近年来合金化理论的一次创新,打破了传统合金以一种或两种金属元素为主元的设计理念,将合金设计体系扩展到以五种及以上元素为主元的领域,由于能够组成高熵合金的元素种类繁多且含量可调,所以具有巨大的开发潜力。 激光熔覆技术作为一种先进的新型材料表面改性技术与装备维修技术,与高熵合金结合,可为该合金材料的应用开辟出新的空间。 通过对现有研究梳理,归纳总结激光熔覆高熵合金涂层的耐腐蚀性能、硬度与摩擦磨损性能以及抗高温氧化性能的性能强化机理;概括分析常见高熵合金的组成元素及其含量变化,对激光熔覆技术制备合金涂层组织结构和性能的影响,为高熵合金涂层组元的选取提供借鉴参考。 最后指出激光熔覆高熵合金涂层在当前研究中的不足与仍需深入研究的问题,展望了高熵合金的应用前景与未来的研究方向。 系统梳理 Al、Ti、Nb、Mo、Ni、Si、B、C 等合金化元素对激光熔覆技术制备高熵合金涂层组织结构和性能的影响规律和作用效果,为激光熔覆高熵合金涂层的合金分成设计提供理论指导。

Effects of Alloy Components and Contents on High Entropy Alloy Coatings by Laser Cladding: A Review

High entropy alloys are regarded as an innovation of alloying theory. They break the traditional design concept of alloy with one or two metal elements as components, and extend the alloy design system to the field with five or more elements as components. High entropy alloys have great potential for development because of the variety and adjustable content of elements. The coatings prepared by laser cladding can be seen as an advanced new material surface modification and equipment maintenance technology. The combination of laser cladding technology and high entropy alloys opens up a new area for its application. Based on the analysis of the existing research foundation, the strengthening mechanism of corrosion resistance, hardness, friction and wear resistance and high-temperature oxidation resistance properties of high entropy alloy coatings using laser cladding were summarized. The influence of common high entropy alloy elements and content changes on the microstructure and properties of alloy coatings prepared by laser cladding were analyzed generally. It is hoped to provide reference for the composition selection of high entropy alloy coatings. In the end, the shortcomings of laser-cladedd high entropy alloy coatings in the current researches and the problems that need to be further studied were pointed out. The application prospects and future research directions of high entropy alloys were prospected. Herein, the effects of Al, Ti, Nb, Mo, Ni, Si, B and C elements on the microstructure and properties of high entropy alloy coatings prepared by laser cladding technology were systematically reviewed, looking forward to offering theoretical guidance for the design of laser-cladded high entropy alloy coatings.