Microstructure evolution and tribo-oxidation induced by friction and wear of cast iron brake discs.

LUO, Quanshun, SHEN, Jing, WANG, Xudong, FARMILO, Nick and GUO, Xiuhua (2024). Microstructure evolution and tribo-oxidation induced by friction and wear of cast iron brake discs. Surface Science and Technology, 2: 1.

Preview

PDF Luo-MicrostructureEvolution(VoR).pdf - Published Version Creative Commons Attribution. Download (3MB) | Preview

Abstract

Braking discs play an important role for the safety of vehicles whereas severe frictional contacts in repeated braking operations result in thermal and tribological failures. This paper reports comprehensive surface and subsurface analyses of a used grey cast iron braking disc to investigate its failure mechanisms as well as related microstructure evolution. Thermal cracking, spalling wear and tribo-oxidation have been found to contribute to the wear failure. The flake-type graphite of the grey cast iron triggered propagation and internal oxidation of the metallic matrix. In a depth of 3 mm beneath the rubbing surface, extensive microstructure evolution occurred by severe plastic deformation of the ferritic matrix, nodularisation and partial dissolution of the lamellar carbides, and internal oxidation. The microstructure evolution resulted in decreased surface hardness to HV0.3 247 as compared to HV0.3 284 of the bulk cast iron.

Item Type:	Article
Identification Number:	https://doi.org/10.1007/s44251-023-00031-4
Depositing User:	Justine Gavin
Date Deposited:	03 Jan 2024 14:38
Last Modified:	15 Jan 2024 16:30
URI:	https://shura.shu.ac.uk/id/eprint/32936

Actions (login required)

View Item

Downloads

Publication Metrics