Laser engineered net shaping of quasi-continuous network microstructural TiB reinforced titanium matrix bulk composites: Microstructure and wear performance

摘要: Abstract Titanium (Ti) and its alloys have been successfully applied to the aeronautical biomedical industries. However, their poor tribological properties restrict fields of applications under severe wear conditions. Facing these challenges, this study investigated TiB reinforced Ti matrix composites (TiB-TMCs), fabricated by in-situ laser engineered net shaping (LENS) process, through analyzing parts quality, microstructure formation mechanisms, characterizations, workpiece performance. At high B content areas (original particle locations), reaction between particles took place, generating flower-like microstructure. low areas, eutectic nanofibers contacted with each other crosslinking The microstructural aggregated connected at boundaries grains, forming a three-dimensional quasi-continuous network results show that compared commercially pure bulk parts, TiB-TMCs exhibited superior performance (i.e. indentation resistance friction resistance) due present reinforcement innovative microstructures formed inside TiB-TMCs. In addition, qualities were improved fewer interior defects optimizing power, thus rendering better