Characterization of yield surface evolution due to large plastic shear strains in pearlitic rail steel
Paper in proceedings, 2018

In order to analyze the material state in the rail surface layer during service, R260 rail steel has been subjected to large shear strains. The evolution of the yield surface at different amounts of predeformation, corresponding to different depths in the railhead, has been characterized. As expected, it is found that the size of the yield surface and the degree of anisotropy increase with the amount of predeformation. However, the major changes occur already after the first of six predeformation cycles, indicating that the yield surface is anisotropic several millimeters into the railhead.

Rail running band

Anisotropic yield surface

Large shear strains

Pearlitic rail steel

Author

Knut Andreas Meyer

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Johan Ahlström

Chalmers, Industrial and Materials Science, Engineering Materials

Magnus Ekh

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Proceedings - 11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems

2590-0609 (ISSN)

Vol. 2018 745-752

11th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2018)
Delft, Netherlands,

Research into enhanced tracks, switches and structures (In2Track)

European Commission (Horizon 2020), 2016-12-01 -- 2020-12-31.

Areas of Advance

Transport

Materials Science

Subject Categories

Applied Mechanics

Transport Systems and Logistics

Metallurgy and Metallic Materials

More information

Latest update

1/24/2019