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Temperature-dependent evolution of the cyclic yield stress of railway wheel steels

Johan Ahlström (Institutionen för material- och tillverkningsteknik, Materialteknologi) ; Elena Kabo (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Anders Ekberg (Institutionen för tillämpad mekanik, Dynamik)
Proceedings of the 10th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems (CM2015) (2015)
[Konferensbidrag, refereegranskat]

The evolution of the cyclic yield stress for a railway wheel steel (UIC ER7T) during cyclic plastic straining has been characterized at different temperatures from -60 – 600°C. Two strain amplitude levels were examined and for temperatures above 200°C, hold periods were included to study stress relaxation during constant compressive strain. The results are of use in predicting material deformation and damage. This is demonstrated by the application to improve a criterion for surface initiated rolling contact fatigue damage.



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Denna post skapades 2016-01-14. Senast ändrad 2016-05-25.
CPL Pubid: 230694