| Issue |
Manufacturing Rev.
Volume 10, 2023
|
|
|---|---|---|
| Article Number | 16 | |
| Number of page(s) | 14 | |
| DOI | https://doi.org/10.1051/mfreview/2023015 | |
| Published online | 10 November 2023 | |
Research article
Wear and corrosion behavior of selected up-quenched and step-quenched CuZnSn shape memory alloys
1
Department of Materials and Metallurgical Engineering, Federal University of Technology Owerri, Owerri, Nigeria
2
Department of Metallurgical and Materials Engineering, Federal University of Technology Akure, Akure, Nigeria
3
Centre for Nanoengineering and Tribocorrosion, School of Mining, Metallurgy and Chemical Engineering, Faculty of Engineering and the Built Environment, University of Johannesburg, Johannesburg, South Africa
4
Materials Design and Structural Integrity Group, Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure PMB 704, Nigeria
* e-mail : anaeleju@gmail.com
Received:
19
August
2023
Accepted:
20
October
2023
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 0.3 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 0.3 M H2SO4 medium, step-quenched alloys had corrosion rates in the range of 0.1022 to 1.1705 mm/yr, which is lower than the range of 0.1466 to 0.2855 mm/yr, and 0.1730 to 0.6027 mm/yr obtained for direct quenched and up-quenched samples respectively. In 3.5% NaCl solution, step-quenched alloys had the lowest corrosion rates 0.0251 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.
Key words: Cu-Zn-Sn alloys / thermal treatment / structural characterization / corrosion properties / wear properties
© J.U. Anaele et al., Published by EDP Sciences 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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