1. In situ Ti2Ni/Ti2S reinforced Ti-based composites with enhanced mechanical properties fabricated by laser cladding on TC4 alloy.
- Author
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Zhang, Tiangang, Aihemaiti, Haireguli, Jeong, In Wha, and Liu, Yanan
- Subjects
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COMPOSITE coating , *LASERS , *WEAR resistance , *METALLIC composites , *TITANIUM composites , *HIGH temperatures , *MICROHARDNESS - Abstract
• A Ti-based reinforced Ti 2 Ni/Ti 2 S coating was fabricated by laser cladding on TC4 alloy. • The thermodynamic characteristics of the laser molten pool were described. • The orientation relationships of β-Ti and TiC were determined. • The microhardness and wear resistance of the deposited coating were improved. In this study, a Ti 2 Ni/Ti 2 S reinforced Ti-based composite coating was fabricated using laser cladding to improve the mechanical properties of TC4 alloy. The results show that the high temperature (>3000 K) of the molten pool ensures the effectiveness of the deposited coating and the thermodynamic conditions for in situ reactions. The phases consisted of β-Ti, Ti 2 Ni, Ti 2 S, TiC, and WC. Furthermore, β-Ti nucleated and grew with TiC as heterogeneous cores due to their orientation relationships of β-Ti{1 0 0}//TiC{1 1 0} and β-Ti{1 1 0}//TiC{1 1 1}. As a result, the microhardness of the coating was 2.30 times higher than the substrate, and the wear volume decreased by 20.23 % compared to the substrate. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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