About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Computational Thermodynamics and Kinetics
|
Presentation Title |
Dislocation-assisted carbon migration theory: application to fatigue, drawing, and wear |
Author(s) |
Pedro Rivera-Diaz-Del-Castillo, Wei Xu, Yong Li |
On-Site Speaker (Planned) |
Pedro Rivera-Diaz-Del-Castillo |
Abstract Scope |
Dislocation-assisted carbon migration theory has originally been conceived to predict the microstructural transitions underwent by bearing fatigue. In bearing applications, mobile dislocations undergoing straining transport carbon in the form of Cottrell atmospheres, which leads to cementite dissolution and re-precipitation. This has demonstrated to predict a range of transitions during rolling contact fatigue, leading to bearing softening, hardening, and failure. In this presentation the concept is extended to predict pearlite and martensite dissolution in heavily drawn wires; this explains their exceptional strengths in excess of 2 GPa. The transitions underwent by pearlitic rail steels can also be predicted, providing a tool for the describing the formation of white etching layers and cracking, and a design method for increasing the reliability of high-speed rail steels. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Phase Transformations, Mechanical Properties |