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

Författare

Knut Andreas Meyer

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Magnus Ekh

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

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,

In2Track

Europeiska kommissionen (Horisont 2020), 2016-12-01 -- 2020-12-31.

Styrkeområden

Transport

Materialvetenskap

Ämneskategorier

Teknisk mekanik

Transportteknik och logistik

Metallurgi och metalliska material

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Senast uppdaterat

2019-01-24