Dry sliding wear and high-velocity impact behaviour of spark plasma sintered ti-ni binary alloys

Azeez Lawan Rominiyi, Mxolisi Brendon Shongwe, Enoch Nifise Ogunmuyiwa, Samson Olaitan Jeje, Smith Salifu, Olanrewaju Seun Adesina, Peter Apata Olubambi

Research output: Contribution to journalArticlepeer-review

Abstract

This work investigated the dry sliding wear behaviour of spark plasma sintered (SPSed) Ti-Ni binary alloys produced at varying nickel content with alloy steel ball as the counterface material, at room temperature under varied applied normal loads. Finite element modeling was used to investigate the high-velocity impact response of the sintered alloys due to the dimensional constraint associated with SPSed samples. Microstructural analysis results revealed the presence of intermetallic phases of Ti-Ni with increasing nickel content. The best wear resistance ranging from 0.25 x 10-3 mm3 /Nm to 0.22 x 10-3 mm3 /Nm across all applied loads was obtained in Ti-6Ni alloy. This was attributed to the compaction of the protective triboxide and carbide layers on the surface of the sample. Oxidative and wear by adhesion were observed at low applied normal load while at high loads the prevalent wear mechanism was abrasive with reduced influence of oxidative and adhesive wear. Finite element analysis results also showed that Ti-6Ni alloy possessed the optimum combination of absorbed energy and ductility to reduce the possibility of brittle failure under impact loading.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalInternational Journal of Engineering Research in Africa
Volume57
DOIs
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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