[tel-01118877] Processing of titanium-based composite materials with nanosized TiC and TiB reinforcements using different powder metallurgy processes: hydrogenation/dehydrogenation sintering, and severe plastic deformation (Equal Channel Angular Pressing: ECAP)

Titanium based composites using nano-sized reinforcements are good candidates for the improvement in mechanical properties without affecting ductility. This study is dedicated to fabrication and characterisation of Ti-based composites using two different powder metallurgy processes: Densification using severe plastic deformation via Equal Channel Angular Pressing (ECAP) and Hydrogenation/Dehydrogenation (HDH) sintering processes (pressureless sintering and hot pressing).ECAP is a fast process based on a severe plastic deformation of material at relatively low temperature. HDH processes use the dehydrogenation of Ti as a leverage of the sintering. The different nanosized reinforcements used in this study are the TiC spherical particles and the whisker shaped TiB. This study shows the influence of either the reinforcement nature and type, and the powder metallurgy processes used, on the final microstructure and properties of the dense materials.



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