A comparative study of the friction and wear performance of Fe-based bulk metallic glass under different conditions. Issue 6 (13th November 2017) - Segu, Dawit Zenebe
Abstract : Purpose: This study aims to compare the friction and wear behaviors of Fe68.3 C6.9 Si2.5 B6.7 P8.8 Cr2.2 Al2.1 Mo2.5 bulk metallic glass (BMG) under sliding using dry, deionized water-lubricated and oil-lubricated conditions. The comparison was performed using a unidirectional ball-on-flat tribometer under different applied loads, and the results were compared to the properties of a conventional material, SUJ2. Fe-based BMG materials have recently been attracting a great deal of attention for prospective engineering applications. Design/methodology/approach: As a part of the development of Fe-based BMGs that can be cost-effectively produced in large quantities, an Fe-based BMG Fe68.8 C7.0 Si3.5 B5.0 P9.6 Cr2.1 Mo2.0 Al2.0 with high glass forming ability was fabricated. In the present study, the friction and wear properties of Fe-based BMG has been comparatively evaluated under dry sliding, deionized water- and oil-lubricated conditions using a unidirectional ball-on-flat tribometer under different applied loads, and the results were compared to the properties of conventional material SUJ2. Findings: The results show that the Fe-based BMG had better friction performance than the conventional material. Both the friction coefficient and wear mass loss increased with increasing load. The sliding wear mechanism of the BMG changed with the sliding conditions. Under dry sliding conditions, the wear scar of the Fe-based BMG was characterized by abrasive wear, plastic deformation, micro-cracks and peeling-off wear. Under water- and oil-lubricated conditions, the wear scar was mainly characterized by abrasive wear and micro-cutting. Originality/value: In this investigation, the authors developed a new BMG alloy Fe68.8 C7.0 Si3.5 B5.0 P9.6 Cr2.1 Mo2.0 Al2.0 to improve the friction and wear performance under dry sliding, deionized water- and oil- lubricated conditions.