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

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...

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Bibliographic Details
Published in:Scripta materialia 2012-07, Vol.67 (2), p.185-188
Main Authors: Gu, Dongdong, Meng, Guangbin, Li, Chuang, Meiners, Wilhelm, Poprawe, Reinhart
Format: Article
Language:English
Subjects:
Laser treatment
Lasers
Melting
Metal matrix composite (MMC)
Nanocomposite
Nanocomposites
Nanomaterials
Nanostructure
Reinforcement
Selective laser melting (SLM)
Solid freeform processes
Titanium
Titanium carbide
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Summary: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 12.5wt.%, 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 577HV0.2, a considerably low coefficient of friction 0.19, and a reduced wear rate 2.3×10−16m3N−1m−1lap−1.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2012.04.013