Yulong Li, Bin Tang, Yue Li, Haoyue Wu, Yunlong Pan, Xuewen Li, Hua Ouyang, Wenqin Wang, Min Lei
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引用次数: 0
Abstract
A high entropy alloy (HEA) coating was applied on Ti-6Al-4 V by electron beam cladding Al7(CoFeNi)86Ti7 HEA powder. The optimal electron beam cladding parameters, determined through orthogonal experimental analysis, were: 64 kV accelerating voltage, 12 mA welding beam current, and 3 s scanning time. Microstructure, phase composition, nano-hardness and wear resistance of the coating prepared using optimal parameters were investigated. The primary phases in the top, middle, and bottom regions of the coating were identified as body-centered cubic (BCC) solid solution with Ti-rich compounds (NiTi, Ti2Ni, and Ti2Co), BCC + Ti0.85Al0.15, and Ti0.85Al0.15, respectively. The coating had an average grain size of 3.9 μm, and the dislocation density of the BCC phase was 1.51 × 1014/m². Due to the presence of compounds, fine grains, and high dislocation density, the coating achieved an average nano-hardness of 8.39 ± 0.29 GPa, approximately 1.8 times higher than that of Ti-6Al-4 V. Additionally, the wear rate of the cladded coating was 22.28 ± 4.56 × 10− 6 mm3/(N·m), representing a 65.5% reduction compared to Ti-6Al-4 V.
期刊介绍:
Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.