Abstract
ABSTRACT In the present study, T5 heat treatment was performed on ZE41 magnesium alloy, and the effect of altered microstructure on wear, friction and corrosion behaviour was evaluated. After the heat treatment, smaller grain size (91 ± 10 µm) was measured compared with the base alloy (110 ± 12 µm). Increased tensile strength from 156.4 ± 9.4 to 172.8 ± 8.9 MPa was achieved after the heat treatment. Owing to smaller grains and formation of precipitates, heat-treated alloy exhibited better wear resistance compared to as-cast alloy, and a 22% reduction in the wear rate was observed. Abrasion, oxidation and delamination were observed as the dominant wear mechanisms. The enhanced corrosion resistance of heat-treated alloy as reflected with lower corrosion current density (7.29 ± 1.25 µA cm–2) compared with base alloy (18.87 ± 2.13 µA cm–2) is attributed to the microstructural modification and the presence of zinc- and zirconium-rich regions at the centre of the grains. Furthermore, the corroded surface morphology indicates localised intergranular and micro-galvanic corrosion. The corrosion rate was reduced by 2.6 times after the heat treatment. The results demonstrate the improved tribocorrosion behaviour of heat-treated ZE41 alloy suitable for light weight structural applications.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
