| MENG Chao,LIU Shuxin,SONG Ziheng,QIU Xingwu,WANG Guanglin,WANG Ziyi,CHEN Zixia,WU Chun,REN Xin.Research Progress in Surface Modification Technology of CrFeCoNi System High Entropy Alloy Block and Coating[J],53(8):25-39 |
| Research Progress in Surface Modification Technology of CrFeCoNi System High Entropy Alloy Block and Coating |
| Received:May 09, 2023 Revised:November 17, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2024.08.003 |
| KeyWord:high entropy alloy surface modification mechanical property wear property corrosion property |
| Author | Institution |
| MENG Chao |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| LIU Shuxin |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| SONG Ziheng |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| QIU Xingwu |
Multicomponent Alloys Key Laboratory of Deyang City, Sichuan College of Architectural Technology, Sichuan Deyang , China |
| WANG Guanglin |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| WANG Ziyi |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| CHEN Zixia |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| WU Chun |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
| REN Xin |
College of Materials Science and Engineering, Liaoning Technical University, Liaoning Fuxin , China |
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| Abstract: |
| 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. However, the HEA often did not make phase structure transformation. And a gradient structure was formed by the surface cold deformation treatment instead of the phase structure transformation. The effects of different surface modification technologies on the hardness and mechanical properties of HEA bulk and coatings were summarized. The paper also explored the strengthening mechanisms of different surface modification technologies on the mechanical properties, wear properties, and corrosion properties of HEA based on the microstructure. Finally, the current challenges and the future outlooks of the surface modification technologies of HEA were emphasized and addressed systematically. The mechanism of internal stress and crack formation during high energy beam surface remelting of HEA requires further exploration. The challenge of integrating surface cold deformation treatment technology with intelligent manufacturing to effectively control the surface properties of HEA is also a problem to be solved in the future. The research on process parameters of surface modification technologies on the microstructure and properties of HEA is not systematic and comprehensive. Traditional experimental methods are costly and inefficient, while computational simulations could predict and simulate material properties and structures by computational simulation and first-principles calculation, reducing costs and improving efficiency. Moreover, it is also particularly important to study the wear, corrosion and wear-corrosion interaction behavior and mechanism of HEA after surface modification under complex working conditions due to their widespread application in many fields. In addition, the future of research in HEA lies in the synergistic application of multiple technologies for surface modification, which can overcome the limitations of individual technology. |
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