摘要
综述了近年来高熵合金(涂层)表面改性技术的研究进展,从原理角度将表面改性技术分为高能量束表面重熔处理和表面冷变形处理2类。这2类表面改性技术都可以改善高熵合金(涂层)的微观组织并减少缺陷,从而达到调控性能的目的。不同之处在于,高能量束表面重熔处理是通过快速熔化及凝固实现的,而表面冷变形处理则是通过使表面发生严重的塑性变形来达成的。高能量束表面重熔处理包括激光重熔和强流脉冲电子束重熔,而表面冷变形处理包括表面机械研磨处理、超声表面滚压处理、超声冲击处理和激光冲击强化。简述了以上几种技术的原理,总结了不同技术之间的优缺点,并对不同改性技术与工艺参数对高熵合金相结构、微观组织的影响进行了概述。基于微观结构的变化,重点探讨和总结了不同改性技术对高熵合金(涂层)力学性能、磨损性能、腐蚀性能的强化机理。最后提出了高熵合金表面改性技术所面临的困难和挑战,并对未来发展方向进行了展望。
Due to differences in the principles and requirements of various preparation technologies,high entropy alloys(HEA)bulk and coatings may have defects such as uneven element distribution,high porosity,and internal cracks,which limit the surface properties and future application of HEA to some extent.The surface modification technology is an effective way to improve the surface properties of HEA.In this paper,the surface modification technology was divided into two types,namely high energy beam surface remelting treatment and surface cold deformation treatment.The high energy beam surface remelting treatment included laser remelting and high-current pulsed electron beam remelting.On the other hand,the surface cold deformation treatment included surface mechanical attrition treatment,ultrasonic surface rolling process,ultrasonic impact treatment and laser shock peening.Firstly,the similarities and differences,advantages and disadvantages of different surface modification technologies were summarized.The rapid melting and solidification process of high energy beam remelting was utilized to tailor the microstructure,reduce defects and improve the performance,of which laser remelting was a well-researched modification method.However,the HEA treated by high energy beam remelting was prone to large thermal stress,which increased the tendency of crack sprouting.The surface cold deformation treatment made HEA undergo severe plastic deformation so as to tailor the microstructure,reduce defects and enhance the performance,among which ultrasonic impact treatment was a more widely studied modification technology.However,the process of part of the surface cold deformation treatments was complex.Secondly,the influences of different surface modification technologies and process parameters on the phase structure and microstructure of HEA were summarized.The HEA treated by high energy beam surface remelting was more likely to undergo phase structure transformation,grain refinement,and repairing defects such as porosity and cracks.Ho
作者
孟超
刘书鑫
宋子衡
邱星武
王广林
王子奕
陈子夏
吴纯
任鑫
MENG Chao;LIU Shuxin;SONG Ziheng;QIU Xingwu;WANG Guanglin;WANG Ziyi;CHEN Zixia;WU Chun;REN Xin(College of Materials Science and Engineering,Liaoning Technical University,Liaoning Fuxin 123000,China;Multicomponent Alloys Key Laboratory of Deyang City,Sichuan College ofArchitectural Technology,Sichuan Deyang 618000,China)
出处
《表面技术》
EI
CAS
CSCD
北大核心
2024年第8期25-39,共15页
Surface Technology
基金
国家自然科学基金(51805235)
四川省自然科学基金(2023NSFSC0406)。
关键词
高熵合金
表面改性
力学性能
磨损性能
腐蚀性能
high entropy alloy
surface modification
mechanical property
wear property
corrosion property
