Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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
Influence of chemical composition and prior microstructure on diode laser hardening of railroad steels
2013 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 228, p. 14-26Article in journal (Refereed) Published
Abstract [en]

Diode laser surface treatment of three different railroad steels, namely pearlitic railroad-rail steel (PRS), ferritic-pearlitic railroad-wheel steel (FPRS) and bainitic railroad-rail steel (BRS), has been investigated. Power-ramping experiments, with in-situ surface temperature measurement, were initially carried out to assess surface temperature effects on treated layers. Influence of laser energy on characteristics of treated layers like surface topology, case-depth, microstructure and micro-hardness was comprehensively analyzed. Results revealed that the hardened layer depth is governed by both the process parameters as well as the nature of the substrate steel. With melting, significant reduction in hardness was noted owing to an increase in residual austenite and coarsening of martensitic microstructure. Unlubricated dry-sliding wear tests performed under close to real rail/wheel conditions revealed substantial improvement in wear resistance of hardened/melted rail steels compared to the parent substrates. The observed differences in characteristics of the laser-treated layers and their tribological behavior have been correlated with the chemistry and prior microstructure of the parent substrates. (C) 2013 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2013. Vol. 228, p. 14-26
Keywords [en]
Railroad steel, Diode laser, Martensite, Bainite, Oxidation, Sliding, wear, TRIBO-METALLOGRAPHIC BEHAVIOR, HIGH-CARBON STEELS, STAINLESS-STEEL, WEAR, BEHAVIOR, SURFACE, TRANSFORMATION, IRRADIATION, FRICTION, RAILS, BALL, Materials Science, Coatings & Films, Physics, Applied
Identifiers
URN: urn:nbn:se:hv:diva-8516OAI: oai:DiVA.org:hv-8516DiVA, id: diva2:860125
Available from: 2015-10-10 Created: 2015-10-08 Last updated: 2017-12-01Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records

Joshi, S.

Search in DiVA

By author/editor
Joshi, S.
In the same journal
Surface & Coatings Technology

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 31 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • 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