Ti6Al4V/SiC Metal Matrix Composites Additively Manufactured by Direct Laser Deposition

C. Sánchez de Rojas Candela; A. Riquelme; V. Bonache; P. Rodrigo; J. Rams

doi:10.1007/s12540-022-01191-y

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자료유형: 학술저널

저자정보: C. Sánchez de Rojas Candela (Universidad Rey Juan Carlos) A. Riquelme (Universidad Rey Juan Carlos) V. Bonache (Universidad Rey Juan Carlos) P. Rodrigo (Universidad Rey Juan Carlos) J. Rams (Universidad Rey Juan Carlos)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.12

발행연도: 2022.12

수록면: 3,120 - 3,144 (25page)

DOI: 10.1007/s12540-022-01191-y

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Nowadays, research on additive manufacturing of Ti6Al4V alloy is growing exponentially but there are just a few studiesabout additive manufacturing of metal matrix composite components. In this work, highly reinforced Ti6Al4V matrix compositeswith SiC particles have been additively manufactured by direct laser deposition (DLD). Ti6Al4V powder and SiCparticles have been deposited layer by layer to form an additive thin wall structure. The geometry, microstructure, and microhardnessof the samples are strongly influenced by the laser scanning speed used during de fabrication process. In addition,the effect of the SiC increment in reinforcement concentrations and the influence of SiC particle sizes in the microstructurehave been evaluated, and the reaction mechanisms have been established. The percentage of reinforcement measured is lowerthan expected due to the reinforcement-matrix reactivity that results in partially dissolved SiC particles and the formationof a TiC and Si5Ti3ring around them. The size and number of particles and reaction products depend on the initial size andpercentage of reinforcement and the DLD scanning speed. The higher the size and percentage of SiC particles and reactionproducts in the matrix, the higher the hardening effect of the composite matrix.

#Direct laser deposition · Ti6Al4V · SiC · Metal matrix composite · Interfacial reactivity

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