Production of Aluminum-Graphite Composite by Spark Plasma Sintering

Rubinkovskii, N. A.; Shornikov, D. P.; Tenishev, A. V.; Залужный, А. Г.; Zholnin, A. G.

doi:10.1007/s10717-019-00126-1

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…At the same applied energy density, the density of 1 wt% TiB/Ti6Al4V composite is higher than that of 3 wt% TiB/Ti6Al4V composite. Actually, similar results of a decrease in density with the addition of ceramic reinforcement have been reported before [26]. Generally, the formation mechanisms for the voids with different morphologies are different.…”

Section: Densification Behaviorsupporting

confidence: 83%

Selective Laser Melting of In Situ TiB/Ti6Al4V Composites: Formability, Microstructure Evolution and Mechanical Performance

Luo

Liu

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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In the present study, a series of in situ TiB/Ti6Al4V composites were fabricated using selective laser melting. The formability, microstructure evolution and mechanical properties of the as-built samples added with different contents of TiB 2 were studied. It is found that the densification level is related to both the content of TiB 2 and laser energy density. The added TiB 2 reinforcement particle can spontaneously react with titanium and then form the TiB phase. The needle-like TiB phase tends to transform into dot-like particles with the decrease in energy density. Additionally, with the increase in TiB 2 content, the TiB phase is coarsened due to the increased nucleation rate and more reactions. The grain morphology is found to largely depend on the translational speed of solid-fluid interface determined by the temperature gradient and cooling rate. Also, the microhardness of the as-built TiB/Ti6Al4V composites is obviously improved. More interestingly, as the energy density increases, the microhardness of the as-built TiB/Ti6Al4V composites firstly increases and then decreases due to the synergy of grain size and different morphologies and distribution of TiB phases. The wear resistance of TiB/Ti6Al4V composites is far superior to that of Ti6Al4V alloy owing to the increased microhardness resulted from the uniform distribution of the hard TiB phase in the matrix.

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Section: Densification Behaviorsupporting

confidence: 83%