Unravelling the combined effect of cooling rate and microalloying on the microstructure and tribological performance of Cu50Zr50

Younes, A., Izadi-Gonabadi, H., Sánchez, R. Martínez, Bull, S.J. and González Sanchez, Sergio (2022) Unravelling the combined effect of cooling rate and microalloying on the microstructure and tribological performance of Cu50Zr50. Wear, 494495. p. 204276. ISSN 0043-1648

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Official URL: https://doi.org/10.1016/j.wear.2022.204276

Abstract

The combined effect of the cooling rate and microalloying has been studied from suction casted Cu50Zr50, Cu49.5Zr50Fe0.5 and Cu49Zr50Fe1 at. % rods of 2 mm and 4 mm diameter. For the 2 mm samples, ∼1000 K/s cooling rate, the microstructure mostly consists of B2 CuZr austenite and it is basically the same for all compositions. However, 0.5 at. % Fe addition promotes the formation of stress-induced B19’ martensite upon wear testing thus improving the wear resistance of the alloy. For the 4 mm samples, ∼250 K/s cooling rate, a multiphase intermetallic is predominant and when microalloyed with 0.5 at. % Fe, a relatively large volume fraction of as-cast B33 CuZr martensite is formed thus resulting in a reduction of the wear resistance. At high cooling rate the wear mechanism is predominantly delamination wear while for low cooling rate the large continuous grooves are indicative of abrasive wear.

Item Type: Article
Additional Information: Funding information: This work has been partially financed by the EPSRC through the ISCF North East Centre for Energy Materials (EP/R021503/1 (H G. and S.B.)) and the First Grant scheme (EP/P019889/1 (S.G.)). S.G. acknowledges this research contract from EPSRC. A. Younes acknowledges research support from Northumbria University.
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Elena Carlaw
Date Deposited: 24 May 2022 17:56
Last Modified: 25 May 2022 08:00
URI: http://nrl.northumbria.ac.uk/id/eprint/49185

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