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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.9
- 수록면
- 2,581 - 2,594 (14page)
- DOI
- 10.1007/s12540-024-01658-0
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초록· 키워드
오류제보하기
It is recognized that the introduction of ceramic particles has been used to produce composite coating in laser cladding toenhance the hardness of Ti6Al4V titanium alloy. In this study, (nano WC + micron TiC)/Ti6Al4V coatings with differentcomposite ceramic contents were manufactured on Ti6Al4V substrate by laser cladding. The effects of the multi-scalecomposite ceramics on the macroscopic morphology, microstructure, and microhardness of coatings were comprehensivelyanalyzed. The results showed that the coatings were mainly composed of α-Ti and (Ti, W)C1 − x. The partial melting of TiCand WC ceramics resulted in the dissolution of C atoms in the matrix of the coatings, thereby strengthening the coatingsthrough solid solution formation. Meanwhile, the growth of (Ti, W)C1 − x was inhibited, owing to the pinning force exertedby nano WC at the grain boundaries. When the content of nano WC was 1.5 wt%, (Ti, W)C1 − x in the coating exhibitedmicron-scale dendritic and submicron granular structures. The average size of the (Ti, W)C1 − x was approximately 0.31 μm.
Moreover, the optimal microhardness of the coating reached 459.99 HV, representing a 35.99% increase compared to themicrohardness of the Ti6Al4V substrate. The enhancement in microhardness was primarily attributed to three key strengtheningmechanisms: fine-grain strengthening, Orowan strengthening, and solid-solution strengthening, which were effectsinduced by the ceramic particles.
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