Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • apa.csl
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Thermal deterioration of railway wheel steels
Chalmers University of Technology.ORCID iD: 0000-0001-5140-9074
Chalmers University of Technology.
2014 (English)In: Proceedings of the Risø International Symposium on Materials Science / [ed] S. Fæster ; N. Hansen ; D. Juul Jensen ; B. Ralph ; J. Sun, Technical University of Denmark , 2014, p. 1-9Conference paper, Published paper (Other academic)
Abstract [en]

In the current work the deterioration of mechanical properties of railway wheel steels is in focus. These are commonly made from medium carbon steels (~0.55 wt.% C) heat treated to a near pearlitic microstructure with some 5–10% pro-eutectoid ferrite. The two steel grades studied here are very common on trains in Europe: the R7T grade is mainly used for freight trains and the R8T grade is mostly used for motorized passenger trains. During operation of trains, high thermal loads are evolved because of recurring acceleration, braking, curving and occasional slippage. It is thus relevant to examine the high temperature performance of wheel material and evaluate the decrease in strength after thermal exposure as well as the degradation of fatigue properties. Samples were extracted from virgin wheels and pre-strained to around 6.5% strain, to also account for the change in properties that is induced by plastic deformation inherent in the wheel tread surface. Both un-deformed and pre-strained material was heat treated for different times in the temperature range of interest, from 250°C to 700°C. Hardening was observed in both conditions around 300°C followed by softening at higher temperatures. Spheroidization of the pearlite started to become visible at 450°C for the un-deformed material and at around 400°C for the pre-strained.

Place, publisher, year, edition, pages
Technical University of Denmark , 2014. p. 1-9
National Category
Materials Engineering
Research subject
Materials Engineering
Identifiers
URN: urn:nbn:se:kau:diva-86887OAI: oai:DiVA.org:kau-86887DiVA, id: diva2:1608812
Conference
35th Risø International Symposium on Materials Science,Risø,Denmark, 09/2014
Available from: 2021-11-04 Created: 2021-11-04 Last updated: 2021-11-10Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Fulltext

Authority records

Dimitrios, Nikas

Search in DiVA

By author/editor
Dimitrios, Nikas
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 62 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • apa.csl
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf