Effect of Martensite Volume Fraction on Oxidative and Adhesive Wear.

Yunbo Zhang,Abdeljalil Jourani

doi:10.3390/ma14112964

Abstract

It is generally known that microstructure can considerably affect the tribological behavior of non-lubricated rubbing. However, there is still a lack of awareness about the effect of microstructure on oxidative wear. The present study focused on the effect of martensite volume fraction (MVF) on oxidative wear by using 25CD4 dual-phase steel. Dry friction tests were performed on a ball-on-flat tribometer with a normal load of 15 N and a mean sliding velocity of 0.013 m/s. Friction coefficient and wear rate increase with the increasing MVF. SEM observation and EDXS analyses of the wear scars showed that the oxidation increases with decreasing MVF. For lower MVF, the main wear mechanism is mild oxidative wear. For higher MVF, severe adhesion is predominant as a wear mechanism. The size of the debris decreases with decreasing MVF.

Highlights

Wear is one of the main reasons for the failure of machine elements [1]
The current research was concentrated on determining the friction and wear mechanism of the tribological behavior of 25CD4 dual-phase steel with different martensite volume fraction (MVF) contacts in ball-on-flat conditions
The friction coefficient decreases with decreasing MVF; For samples with low MVF (59% or less), there is little wear compared with high

Summary

Introduction

Wear is one of the main reasons for the failure of machine elements (wear, corrosion, fracture and fatigue) [1]. Material wear greatly affects the service life of mechanical components. It may cause the failure of mechanical parts which leads to a great loss in energy and materials, eventually associated with a consequent financial cost. Studying the friction and wear of materials is fundamental to reduce the severe wear of mechanical parts, as well as to reduce energy and economic losses. In the last few years, many researchers have contributed to the study of the impact of microstructure on friction and wear mechanisms [2,3,4,5,6,7]. For dual-phase steel, Davie et al [8]

Methods

Discussion

Conclusion