Influence of spark plasma sintering on microstructure and wear behaviour of Ti-6Al-4V reinforced with nanosized TiN

Journal article

Authors/Editors

Bhero, Shepherd

Research Areas

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Publication Details

Author list: Falodun OE, Obadele BA, Oke SR, Ige OO, Olubambi PA, Lethabane ML, Bhero SW

Publisher: Elsevier

Place: AMSTERDAM

Publication year: 2018

Journal: Transactions of Nonferrous Metals Society of China (1003-6326)

Journal acronym: T NONFERR METAL SOC

Volume number: 28

Issue number: 1

Start page: 47

End page: 54

Number of pages: 8

ISSN: 1003-6326

Languages: English-Great Britain (EN-GB)

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Abstract

Ti-6Al-4V/TiN composites were successfully consolidated by spark plasma sintering (SPS). TiN addition to Ti-6Al-4V was varied from 1% to 5% (volume fraction). The effect of TiN addition on the densification, microstructure, microhardness and wear behaviour of Ti-6Al-4V was studied. Experimental results showed reduction in sintered density of the compacts from 99% to 97% with increase in TiN content. However, an increase in microhardness value was recorded from HV0.1 389 to HV0.1 488. X-ray diffraction (XRD) analysis showed that the intensity of diffraction peaks of TiN phase in the composites increased also with formation of small amount of secondary Ti2N phase. SEM analysis of SPS sintered nanocomposites possessed a refinement of alpha/beta phase microstructure in Ti-6Al-4V with the presence of uniformly dispersed TiN particles. The worn surface of the composite showed improved abrasive wear resistance with non-continuous grooves as compared to the sintered Ti-6Al-4V without TiN addition.

Keywords

Microstructure, spark plasma sintering, Ti-6Al-4V, TiN, Wear

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