Development and Characterization of Ti/SiC Metal Matrix Nanocomposite Coating with Superior Surface Properties

In this work, a Ti/SiC metal matrix nanocomposite (MMNC) coating was produced on Ti-6Al-4V substrate by Selective Laser Melting (SLM) technique. The MMNC coating had 7% SiC and 93% Ti by volume. It was observed that applying the nanocomposite coating on titanium substrate significantly reduced the wear and coefficient of friction (COF). By applying the coating, 108% improvement in hardness of Ti-6Al-4V substrates was obtained. The MMNC coating also showed a COF of 0.38 as compared to 0.42 for the Ti-6Al-4V substrate.

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Selective Laser Melting of Ti/SiC Nanocomposite Coating towards Enhanced Surface Performance of Ti64

In another study, the sensitivity of the coating behavior to its material model parameters was evaluated in hypervelocity impact simulations. Single-parameter sensitivity analyses were performed on the parameters of the MMNC bilinear elastic plastic material model to evaluate the effect of each parameter on improving the accuracy of the simulations. 

Lower elastic modulus and yield stress and higher failure strain were obtained for the MMNC coating with 7% SiC as compared to the MMNC coating with 35% reported in the literature. 

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Material Model Characterization of a Ti/SiC Metal Matrix Nanocomposite Coating Subjected to Hypervelocity Impact