Microstructure and mechanical properties of the running band in a pearlitic rail steel: Comparison between biaxially deformed steel and field samples
Artikel i vetenskaplig tidskrift, 2018

The large deformations occurring in the surface layer of rail heads strongly influence the material behavior. Cracks typically develop from this critical region. However, conventional material testing of this layer is not possible due to the large gradients. A method for obtaining a similar material through predeformation is therefore investigated. Subsequent analyses of the obtained material can improve our understanding of the material behavior close to the running band. Hardness, shear lines and cementite lamella orientation distributions are compared in order to determine whether the obtained material is similar to that of the field samples extracted from rails that have been in service for several years. The predeformation method produces a consistent material, which is representative of the material in the rail field samples that have accumulated large shear strains.

Large plastic deformation

Rail

Pearlitic steel

Axial-Torsion

Microstructure

Författare

Knut Andreas Meyer

Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik

Dimitrios Nikas

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Johan Ahlström

Chalmers, Industri- och materialvetenskap, Konstruktionsmaterial

Wear

0043-1648 (ISSN)

Vol. 396-397 12-21

Styrkeområden

Transport

Materialvetenskap

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Farkostteknik

Metallurgi och metalliska material

DOI

10.1016/j.wear.2017.11.003