TY - JOUR
T1 - Unravelling the combined effect of cooling rate and microalloying on the microstructure and tribological performance of Cu50Zr50
AU - Younes, Abdurauf
AU - Izadi-Gonabadi, Hassan
AU - Martinez Sanchez, Roberto
AU - Bull, Steve
AU - Gonzalez Sanchez, Sergio
N1 - 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.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - 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.
AB - 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.
KW - Abrasive wear
KW - Delamination wear
KW - Hardness
KW - SEM
KW - Surface roughness
UR - https://www.scopus.com/pages/publications/85124179218
U2 - 10.1016/j.wear.2022.204276
DO - 10.1016/j.wear.2022.204276
M3 - Article
SN - 0043-1648
VL - 494-495
JO - Wear
JF - Wear
M1 - 204276
ER -