Effect of Cr content on synergistic effect of Cr-Al during oxidation of high-entropy AlCoCrxNiTi alloys

被引：11
|
作者：
Chen, Tingting [1 ,2 ]
Shi, Yongjun [1 ]
Ren, Yong [2 ]
Li, Xianfa [1 ]
Liu, Zhitong [2 ]
Han, Tiantian [2 ]
机构：
[1] China Univ Petr, Coll Mech & Elect Engn, Qingdao, Shandong, Peoples R China
[2] Shandong Lab Vocat & Tech Coll, Dept Intelligent Mfg, Jinan, Shandong, Peoples R China
来源：
CORROSION SCIENCE | 2024年 / 227卷
基金：
中国国家自然科学基金;
关键词：
AlCoCrxNiTi high entropy alloy; Laser cladding; Microstructure; Oxidation mechanism; TI-AL; BEHAVIOR; MICROSTRUCTURE; COATINGS; DISLOCATIONS; KINETICS; PHASES; GROWTH;
D O I：
10.1016/j.corsci.2023.111690
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
AlCoCrxNiTi high-entropy alloy coatings, mainly composed of the BCC and B2 phases, were synthesized on Ti-6Al-4V substrates by laser cladding. The incorporation of Cr-refined grains enhanced the hardness of the alloy. Oxidation kinetic curves of the alloys at 800 degrees C in the air followed the parabolic law, and AlCoCr0.5NiTi alloy exhibited excellent oxidation resistance. The incorporation of an appropriate amount of Cr provided a structural template for the formation of Al2O3 and increased the diffusion rate of Al in the stable oxidation stage, leading to a reduction in the concentration required to form a continuous Al2O3 oxide film.
引用
收藏
页数：15
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