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논문 기본 정보

자료유형
학술저널
저자정보
Jinguo Zhao (Xijing University) Morteza Taheri (Iranian Research Organization for Science and Technology (IROST)) Kourosh Shirvani (Iranian Research Organization for Science and Technology (IROST)) Hamed Alizadeh (Islamic Azad University) Mohammad Ali Palay (Islamic Azad University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.3
발행연도
2024.3
수록면
832 - 842 (11page)
DOI
10.1007/s12540-023-01537-0

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초록· 키워드

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To improve the wear resistance properties of gas turbine compressor parts, a high entropy alloy (HEA) coating of FeCoNiCuAlwith 60% WC ceramic particles was prepared on GTD-111 superalloy with laser cladding (LC). For this purpose, Fe,Co, Ni, Cu and Al elemental powders with high purity were subjected to mechanical alloying (MA) for up to 50 h. Changesin crystallite size and lattice strain at different time intervals of MA were determined by XRD. The XRD results showedthat after 50 h of MA, a two-phase HEA solid solution with almost the same aspect ratio, crystallite size of 8.35 nm, andlattice strain of 1.78% was obtained. After preparing the HEA powder, and adding 60% WC ceramic powder to it, the abovecomposite coating operation was done by LC. It was shown that the added WC decomposed and formed in situ carbides. These carbides include WC, W2C,and Co4W2C,which are formed with uniform distribution without cracks or holes in thecoating. The characteristics of melting and rapid solidification in LC and non-homogeneous nucleation of melt from WCparticles reduced the appearance of misorientation grains and increased high-angle grain boundary (HAGB). These thingsalso caused a decrease in the friction coefficient of the coating by 27% and an increase in the microhardness of the coating by97% compared to the substrate. Investigations showed that the presence of WC particles has a significant effect on increasingthe hardness and reducing the wear volume of the specimens.

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