|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Technical Division Student Poster Competition
||SPG-54: New Developments in the Rolling Contact Fatigue of M50 Bearing Steel
||Gael Guetard, Pedro Rivera-Díaz-del-Castillo
|On-Site Speaker (Planned)
M50 is probably the most used steel grade for bearings required to withstand high temperatures (100-300°C). However, its microstructure and behaviour under rolling contact fatigue lack understanding; this work presents an overview of M50 microstructure-property relations.
Several variants of M50 were produced using conventional casting as well as powder metallurgy and characterized using advanced techniques. Rolling contact fatigue tests were also performed and thorough post-test examination of the specimens revealed the presence of white etching areas (known as “butterflies”) initiated by primary carbides. The characteristics of these features have been linked to the number of stress cycles and the loading conditions. The role of these butterflies on failure by spalling is discussed.
||Definite: None Selected