TY - JOUR
T1 - Wear and corrosion behavior of selected up-quenched and step-quenched CuZnSn shape memory alloys
AU - Anaele, Justus Uchenna
AU - Alaneme, Kenneth Kanayo
AU - Omotoyinbo, Joseph Ajibade
N1 - Publisher Copyright:
© 2023 EDP Sciences. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The effect of thermal treatment on the wear and corrosion behavior of three categories of Cu-Zn-Sn-Fe SMAs designated A, B, and C is studied. Wear properties were investigated using a tribometer whilst corrosion in 0.3a? M H2SO4 and 3.5%NaCl media was studied using the potentiodynamic polarization method. The microstructure of the alloys mainly consists of FCC Cu-rich phase and Cu5Zn8 phase. The up-quenched A alloys show the highest hardness and lowest wear rate values of 72.1 HRB and 0.143 mm3/N/m respectively. Average COF was higher for the samples subjected to direct-quenching (0.35- 0.12) than the up-quenched (0.16- 0.12) and step-quenched (0.2- 0.08) samples. Wear occurred by mixed mode mechanisms of abrasion and adhesion evident by grooves and wear particles on the surface. In 0.3a M H2SO4 medium, step-quenched alloys had corrosion rates in the range of 0.1022 to 1.1705a? mm/yr, which is lower than the range of 0.1466 to 0.2855a mm/yr, and 0.1730 to 0.6027a mm/yr obtained for direct quenched and up-quenched samples respectively. In 3.5% NaCl solution, step-quenched alloys had the lowest corrosion rates 0.0251a mm/yr relative to samples subjected to up-quenching and direct quenching treatment. Generally, step-quenching treatment effectively improved the corrosion resistance of alloys in both media.
AB - The effect of thermal treatment on the wear and corrosion behavior of three categories of Cu-Zn-Sn-Fe SMAs designated A, B, and C is studied. Wear properties were investigated using a tribometer whilst corrosion in 0.3a? M H2SO4 and 3.5%NaCl media was studied using the potentiodynamic polarization method. The microstructure of the alloys mainly consists of FCC Cu-rich phase and Cu5Zn8 phase. The up-quenched A alloys show the highest hardness and lowest wear rate values of 72.1 HRB and 0.143 mm3/N/m respectively. Average COF was higher for the samples subjected to direct-quenching (0.35- 0.12) than the up-quenched (0.16- 0.12) and step-quenched (0.2- 0.08) samples. Wear occurred by mixed mode mechanisms of abrasion and adhesion evident by grooves and wear particles on the surface. In 0.3a M H2SO4 medium, step-quenched alloys had corrosion rates in the range of 0.1022 to 1.1705a? mm/yr, which is lower than the range of 0.1466 to 0.2855a mm/yr, and 0.1730 to 0.6027a mm/yr obtained for direct quenched and up-quenched samples respectively. In 3.5% NaCl solution, step-quenched alloys had the lowest corrosion rates 0.0251a mm/yr relative to samples subjected to up-quenching and direct quenching treatment. Generally, step-quenching treatment effectively improved the corrosion resistance of alloys in both media.
KW - Corrosion properties
KW - Cu-Zn-Sn alloys
KW - Structural characterization
KW - Thermal treatment
KW - Wear properties
UR - http://www.scopus.com/inward/record.url?scp=85178211292&partnerID=8YFLogxK
U2 - 10.1051/mfreview/2023015
DO - 10.1051/mfreview/2023015
M3 - Article
AN - SCOPUS:85178211292
SN - 2265-4224
VL - 10
JO - Manufacturing Review
JF - Manufacturing Review
M1 - 16
ER -