Study of dry wear behavior of Novel ferrous samples prepared by powder metallurgy method

Abstract

The sliding wear behaviour of newly developed ferrous powder metallurgy samples was investigated under dry sliding conditions. Wear tests were conducted by varying the normal loads of 30 N, 40 N, and 50 N at a constant velocity of 1 m/s and then at a constant load of 30 N by varying the sliding velocities by 0.5 m/s, 1 m/s, and 2 m/s at room temperature. Furthermore, the variations in the wear rate and coefficient of friction at a constant sliding distance of 5400 m were studied at different normal loads keeping sliding velocity constant at 1 m/s as well as at different sliding velocities and maintaining normal load at 30N. The wear characteristics were evaluated using weight loss measurements. The mechanism of wear was observed using scanning electron microscope and compositional analysis using energy-dispersive X-ray spectroscopy (EDX). It was found that increased normal load had a dominant effect on the wear loss in comparison to increased sliding speed during the tribological testing of the powder metallurgy samples.

Investigation of the Elevated Temperature Tribological Property and Wear Mechanism of Fe–15Cu–0.8C Materials Containing Mo‐Coated MoS2Powders

“…[33] For M0 specimens, when the experimental temperature rises from RT to 300 °C, the average coefficient of friction and wear rate decrease due to the formation of ferrous oxides (Fe 2 O 3 ) and copper oxides (CuO) films with antifriction properties on the abrasion surface. [2] Upon reaching a test temperature of 600 °C, despite the presence of antifriction phases on the worn surface, the oxidation behavior intensifies, resulting in an increase in the coefficient of friction of M0 sample. For Fe-15Cu-0.8C-3.75 (Mo-coated MoS 2 ) samples, at temperature below 300 °C, except for the formation of Fe 2 O 3 and CuO on the sample surfaces, the solid lubricant MoS 2 within the sample remains unoxidized, contributing to a reduction in the frictional coefficient and wear rate.…”

“…Powder metallurgical ferrous antifriction materials (FAMs) are known for their excellent mechanical and antifriction properties, rendering them extensively employed across various industries including aviation, aerospace, and machinery. [1][2][3] Owing to the rapid development of modern industries, conventional FAMs cannot completely meet the requirements for applications at elevated temperatures. [4,5] Consequently, high standards have been established to enhance the antifriction performance of FAMs, driving the development of materials for hightemperature antifriction applications.…”