Nanoindentation studies on TiN nanoceramic reinforced Ti–6Al–4V matrix composite

Mosima Edith Maja, Oluwasegun Eso Falodun, Babatunde Abiodun Obadele, Samuel Ranti Oke, Peter Apata Olubambi

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The technological advancement in nanoindenter development has enabled investigations of material under dynamic conditions which offer direct measurement of hardness, modulus of elasticity and contact stiffness among other properties. In this study, mechanical properties of sintered Ti–6Al–4V reinforced with 1–4vol% TiN was investigated by ultra-nanoindenter (UNHT) technique. It was revealed that the presence of reinforcements controls the grain morphology of the microstructure, thus an improvement in the mechanical properties the sintered compacts. Furthermore, from the nanoindentation results, it was evident that both hardness and modulus of elasticity depend on the presence of TiN in Ti–6Al–4V matrix. Sintered compact with 4 vol% TiN had the highest indentation hardness value of 7517 MPa (696 HV) and modulus of elasticity of 156 GPa as compared with that of Ti–6Al–4V alloy. Also sintered nanocomposite materials exhibited higher hardness with the decrease in maximum indentation depth and possibly better wear resistance than the Ti–6Al–4V alloy. This shows the influence of hard phase reinforcements on the mechanical properties of the sintered nanocomposites.

Original languageEnglish
Pages (from-to)4419-4425
Number of pages7
JournalCeramics International
Volume44
Issue number4
DOIs
Publication statusPublished - Mar 2018
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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