Laser ablation behavior of Al0.2CrNbTiV refractory high-entropy alloy coating deposited by high speed laser cladding

被引：0
作者：
Bi, Zhijiang [1 ,2 ]
Liu, Kangcheng [3 ]
Chen, Tianhui [1 ,2 ]
Lou, Liyan [1 ,2 ]
Cai, Zhihai [4 ]
Yi, Liu [3 ]
Wang, Haidou [4 ]
Li, Chengxin [3 ,5 ]
机构：
[1] Tianjin Univ Technol & Educ, Natl Local Joint Engn Lab Intelligent Mfg Oriented, Tianjin 300222, Peoples R China
[2] Tianjin Univ Technol & Educ, Key Lab High Performance Precis Forming Technol &, Tianjin 300222, Peoples R China
[3] Xi An Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China
[4] Army Acad Armored Forces, Natl Engn Res Ctr Remfg, Beijing 100072, Peoples R China
[5] Shandong Moon Hydrogen Technol Res Inst Co Ltd, Jinan 265503, Shandong, Peoples R China
来源：
OPTICS AND LASER TECHNOLOGY | 2025年 / 181卷
基金：
中国国家自然科学基金;
关键词：
High speed laser cladding; Coating; High entropy alloy; Laser ablation; Rapid oxidation behavior; ALUMINUM TITANATE CERAMICS; SOLID-SOLUTION PHASE; MECHANICAL-PROPERTIES; TITANIUM-ALLOYS; RESISTANT; MICROSTRUCTURES; OXIDATION; CR; VOLATILIZATION; STABILITY;
D O I：
10.1016/j.optlastec.2024.111816
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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 similar to 2100 mu m and depth of similar to 150 mu m, 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-x, 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.
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页数：12
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