The influence of nano TiN additions on mechanical properties and fracture behaviour of spark plasma sintered SAF 2205

Samuel Ranti Oke, Mahlatse R. Mphahlele, Oladeji Oluremi Ige, Oluwasegun Eso Falodun, Babatunde Abiodun Obadele, Peter Apata Olubambi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The influences of TiN additions on microstructure, mechanical properties and fracture behaviour of the SAF 2205-TiN composites were investigated. Automated spark plasma sintering machine (model HHPD-25, FCT GmbH Germany) was used to fabricate the composites. Characterization was performed using Scanning Electron Microscopy. Archimedes principle was used to evaluate the densities of the composites. Hardness (H) and elastic modulus (E) were investigated by nanoindentation using load 1 mN. The results obtained indicated that SPS process parameters were optimized at 1150 °C, 15 min and 100 oC/min. The microstructure revealed that the TiN particles have a general tendency to segregate at the grain boundaries. The hardness (H) and elastic modulus (E) values increased with TiN contents due to the hardening and stiffening effects of the TiN reinforcements. With increase in TiN content, the dimples on the fracture surfaces of the composites reduced drastically with only faint traces of the dimples left. A combination of ductile and brittle fractures is prevalent in the 6 and 8 % TiN.

Original languageEnglish
Title of host publicationMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
PublisherAssociation for Iron and Steel Technology, AISTECH
Pages1172-1174
Number of pages3
ISBN (Electronic)9781510850583
DOIs
Publication statusPublished - Jan 1 2017
Externally publishedYes
EventMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017 - Pittsburgh, United States
Duration: Oct 8 2017Oct 12 2017

Publication series

NameMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
Volume2

Conference

ConferenceMaterials Science and Technology Conference and Exhibition 2017, MS and T 2017
CountryUnited States
CityPittsburgh
Period10/8/1710/12/17

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Materials Science (miscellaneous)
  • Energy Engineering and Power Technology

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  • Cite this

    Oke, S. R., Mphahlele, M. R., Ige, O. O., Falodun, O. E., Obadele, B. A., & Olubambi, P. A. (2017). The influence of nano TiN additions on mechanical properties and fracture behaviour of spark plasma sintered SAF 2205. In Materials Science and Technology Conference and Exhibition 2017, MS and T 2017 (pp. 1172-1174). (Materials Science and Technology Conference and Exhibition 2017, MS and T 2017; Vol. 2). Association for Iron and Steel Technology, AISTECH. https://doi.org/10.7449/2017/MST-2017-1172-1174