Bi Zhijiang , Liu Kangcheng , Chen Tianhui , Liyan Lou , Cai Zhihai , Yi Liu , Wang Haidou , Li Chengxin
{"title":"Laser ablation behavior of Al0.2CrNbTiV refractory high-entropy alloy coating deposited by high speed laser cladding","authors":"Bi Zhijiang , Liu Kangcheng , Chen Tianhui , Liyan Lou , Cai Zhihai , Yi Liu , Wang Haidou , Li Chengxin","doi":"10.1016/j.optlastec.2024.111816","DOIUrl":null,"url":null,"abstract":"<div><div>Al<sub>0.2</sub>CrNbTiV refractory high-entropy alloy coating were deposited on the surface of Ti-6Al-4V titanium alloy by high-speed laser cladding technology. The laser ablation resistance of Al<sub>0.2</sub>CrNbTiV coating is studied, and the results show that the coating can hinder laser ablation with a relatively flat ablation region formed in a diameter of ∼2100 μm and depth of ∼150 μm, which was mainly the reason of the structural characteristics of the Al-Cr-Nb-Ti-V high-entropy alloy system and the formation of the multiple oxides. Due to the high structural stability of Al-Cr-Nb-Ti-V system and good structural matching with Ti element, the diffused Ti from the substrate can be dissolved in the multi- principal elements high-entropy alloy, preventing the direct formation of series none-protective Ti oxides, with (Ti, Nb, V)O<em><sub>x</sub></em>, AlTi<sub>3</sub>O<sub>6</sub>, Al<sub>2</sub>TiO<sub>5</sub>/AlTi<sub>2</sub>O<sub>5</sub> eutectic and other oxides formed instead. At the same time, the vaporization of CrO<sub>3</sub> could remove a significant amount of heat, and the formation of low melting point Al<sub>2</sub>TiO<sub>5</sub>/AlTi<sub>2</sub>O<sub>5</sub> eutectic can reduce the surface temperature, relieve stress, fill cracks of the coating. Furthermore, Al<sub>0.2</sub>CrNbTiV coating has a higher thermal conductivity than the titanium substrate, conducive to heat loss and the coating remains relatively dense with no peeling or penetrating crack formed during the ablation process, which improve the flame-retardant property of the Al<sub>0.2</sub>CrNbTiV coating synergistically.</div></div>","PeriodicalId":19511,"journal":{"name":"Optics and Laser Technology","volume":"181 ","pages":"Article 111816"},"PeriodicalIF":4.6000,"publicationDate":"2024-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics and Laser Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003039922401274X","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Al0.2CrNbTiV refractory high-entropy alloy coating were deposited on the surface of Ti-6Al-4V titanium alloy by high-speed laser cladding technology. The laser ablation resistance of Al0.2CrNbTiV coating is studied, and the results show that the coating can hinder laser ablation with a relatively flat ablation region formed in a diameter of ∼2100 μm and depth of ∼150 μm, which was mainly the reason of the structural characteristics of the Al-Cr-Nb-Ti-V high-entropy alloy system and the formation of the multiple oxides. Due to the high structural stability of Al-Cr-Nb-Ti-V system and good structural matching with Ti element, the diffused Ti from the substrate can be dissolved in the multi- principal elements high-entropy alloy, preventing the direct formation of series none-protective Ti oxides, with (Ti, Nb, V)Ox, AlTi3O6, Al2TiO5/AlTi2O5 eutectic and other oxides formed instead. At the same time, the vaporization of CrO3 could remove a significant amount of heat, and the formation of low melting point Al2TiO5/AlTi2O5 eutectic can reduce the surface temperature, relieve stress, fill cracks of the coating. Furthermore, Al0.2CrNbTiV coating has a higher thermal conductivity than the titanium substrate, conducive to heat loss and the coating remains relatively dense with no peeling or penetrating crack formed during the ablation process, which improve the flame-retardant property of the Al0.2CrNbTiV coating synergistically.
期刊介绍:
Optics & Laser Technology aims to provide a vehicle for the publication of a broad range of high quality research and review papers in those fields of scientific and engineering research appertaining to the development and application of the technology of optics and lasers. Papers describing original work in these areas are submitted to rigorous refereeing prior to acceptance for publication.
The scope of Optics & Laser Technology encompasses, but is not restricted to, the following areas:
•development in all types of lasers
•developments in optoelectronic devices and photonics
•developments in new photonics and optical concepts
•developments in conventional optics, optical instruments and components
•techniques of optical metrology, including interferometry and optical fibre sensors
•LIDAR and other non-contact optical measurement techniques, including optical methods in heat and fluid flow
•applications of lasers to materials processing, optical NDT display (including holography) and optical communication
•research and development in the field of laser safety including studies of hazards resulting from the applications of lasers (laser safety, hazards of laser fume)
•developments in optical computing and optical information processing
•developments in new optical materials
•developments in new optical characterization methods and techniques
•developments in quantum optics
•developments in light assisted micro and nanofabrication methods and techniques
•developments in nanophotonics and biophotonics
•developments in imaging processing and systems