The studies on the tribological performance, characterization and mechanical properties of W-2Ni-1Fe (wt%) alloy

• Published in: International journal of refractory metals & hard materials 2022-02, Vol.103, p.105752, Article 105752
• Main Authors: Paul, Bhaskar, Kishor, Jugal, Karthik, A., Murthy, Tammana S.R.C., Sunil, Saurav, Singh, K., Majumdar, Sanjib
• Format: Article
• Language: English
• Subjects: Abrasive wear; Hardening rate; Hardness; Liquid phases; Mechanical properties; Modulus of elasticity; Nanoindentation; Room temperature; Sliding; Strain hardening; Strain rate sensitivity; Tribology; Tungsten base alloys; Tungsten carbide; Tungsten heavy alloy; Wear mechanism; Wear mechanisms; Wear rate
• ISSN: 0263-4368; 2213-3917
• DOI: 10.1016/j.ijrmhm.2021.105752

Friction, wear and mechanical properties of the liquid phase sintered W-2Ni-1Fe (wt%) alloy were investigated. Tribological tests were carried out at different loads, frequencies and sliding distances under reciprocative sliding condition, against tungsten carbide (WC-Co) counter body. Co-efficient of friction (COF), wear volume and specific wear rate were determined. The dominant operative wear mechanisms were identified in different testing conditions. Abrasive wear and tribo-chemical wear mechanisms were found to be the dominant wear mechanisms. Room temperature strain rate sensitivity was determined by conducting jump test in tensile mode. The alloy showed low strain rate sensitivity with significant strain hardening. High resolution nanoindention mapping was carried out to establish structure property correlations at the micro-meter length scale. The hardness and elastic modulus maps were generated to determine the hardness and elastic modulus of the constituent phases of W and of γ-Ni matrix. The maps were found to correlate well with the actual microstructure obtained from opticaland electron microscopy. •Friction and wear properties of the W-2Ni-1Fe (wt%) alloy were investigated.•Dominant wear mechanisms were determined based on the tribological studies.•Mechanical properties were mapped using high speed nanoindentation technique.•Room temperature strain rate sensitivity of the W-2Ni-1Fe alloy was determined.