A correlation between nano and micro-hardness properties of TiN nanoparticles strengthened SAF 2205

M. R. Mphahlele, S. R. Oke, O. O. Ige, O. E. Falodun, B. A. Obadele, P. A. Olubambi, M. B. Shongwe

Research output: Contribution to journalConference articlepeer-review


This work studied the correlation between Vickers and nano-hardness of SAF 2205 reinforced with TiN nanoparticles for the convenience of assessing its mechanical properties. Spark plasma sintering was used to fabricate the composites. Micro and nanoindentations were performed to determine micro and nanohardness values of the fabricated composite. Optical microscope was used to assess the microstructure. The microstructure revealed that the TiN dominated the ferrite/ferrite, ferrite/austenite and austenite/austenite grain boundaries. The micro and nanohardness at the TiN dominated grain boundaries were higher compared to the grain hardness. Hardness also increased considerably as the TiN nanoparticles increases. This is also owed to the strengthening effect played by TiN at the grain boundaries by disrupting dislocation motion in the composite. The determined Vickers hardness was plotted as a function of the corresponding nanohardness, a good linear relation was found between Vickers hardness and nanohardness. A linear relationship (HV = 215.15 + 15.03Hnano) was established which indicates that there is no difference in behavior for the Vickers hardness and nanohardness.

Original languageEnglish
Article number012009
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 3 Apr 2019
Event4th International Conference on Structural NanoComposites, NANOSTRUC 2018 - Berlin, Germany
Duration: 23 May 201824 May 2018

ASJC Scopus subject areas

  • General Materials Science
  • General Engineering


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