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Selective laser melting of TiC/Ti bulk nanocomposites: Influence of nanoscale reinforcement

: Gu, D.; Meng, G.; Li, C.; Meiners, W.; Poprawe, R.


Scripta materialia 67 (2012), Nr.2, S.185-188
ISSN: 1359-6462
Fraunhofer ILT ()

Selective laser melting (SLM), as a new production route, was applied to prepare nanocrystalline TiC-reinforced Ti matrix nanocomposites. The microstructural and mechanical properties of SLM-processed nanocomposites were sensitive to the nanoscale TiC addition. The optimal TiC content was determined to be 12.5 wt.%, and the homogeneously dispersed TiC reinforcement had a nanoscale lamellar structure that was completely different to the starting nanoparticle morphology. The 98.3% dense TiC/Ti nanocomposites had an elevated microhardness 577HV 0.2, a considerably low coefficient of friction 0.19, and a reduced wear rate 2.3 × 10 -16 m 3 N -1 m -1 lap -1.