The radial hardness-profile and the microstructure of railroad car axle materials treated by surface rolling, determined by novel examination methods

Tibor Berecz, L. Balogh, I. Mészáros, Ágoston Steinbach

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Surface rolling is a cold-working technique used for hardening the surface of steel and ductile cast iron components. This process increases the surface hardness and improves the fatigue properties of components, so it is commonly used to treat railroad car wheel axles. The present paper examines the influence of this surface strengthening technique on the microstructure of the railroad car wheel axle material by hardness tests, optical microscopy (OM), and other novel examination methods, such as scanning electron microscopy (SEM), X-ray line profile analysis (XLPA), non-destructive magnetic evaluation (NDE) and automated electron backscatter diffraction (EBSD). The results show that surface rolling causes an increase in hardness down to a depth of ~10. mm. It is also shown, that the increase in hardness is not due to grain refinement or change in grain morphology; thus it is likely to be caused by an increase in dislocation density.

Original languageEnglish
Pages (from-to)95-101
Number of pages7
JournalMaterials Science and Engineering A
Volume592
DOIs
Publication statusPublished - Jan 13 2014

Fingerprint

rail transportation
Axles
Railroad cars
hardness
examination
Hardness
microstructure
Microstructure
profiles
wheels
Wheels
cold working
Cold working
hardness tests
Steel
Grain refinement
Cast iron
Electron diffraction
hardening
Optical microscopy

Keywords

  • EBSD
  • Hardness measurement
  • Non-destructive magnetic evaluation
  • Scanning electron microscopy
  • Surface hardening
  • X-ray diffraction

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

@article{584b4d4b5990499b9e0321975c03ecea,
title = "The radial hardness-profile and the microstructure of railroad car axle materials treated by surface rolling, determined by novel examination methods",
abstract = "Surface rolling is a cold-working technique used for hardening the surface of steel and ductile cast iron components. This process increases the surface hardness and improves the fatigue properties of components, so it is commonly used to treat railroad car wheel axles. The present paper examines the influence of this surface strengthening technique on the microstructure of the railroad car wheel axle material by hardness tests, optical microscopy (OM), and other novel examination methods, such as scanning electron microscopy (SEM), X-ray line profile analysis (XLPA), non-destructive magnetic evaluation (NDE) and automated electron backscatter diffraction (EBSD). The results show that surface rolling causes an increase in hardness down to a depth of ~10. mm. It is also shown, that the increase in hardness is not due to grain refinement or change in grain morphology; thus it is likely to be caused by an increase in dislocation density.",
keywords = "EBSD, Hardness measurement, Non-destructive magnetic evaluation, Scanning electron microscopy, Surface hardening, X-ray diffraction",
author = "Tibor Berecz and L. Balogh and I. M{\'e}sz{\'a}ros and {\'A}goston Steinbach",
year = "2014",
month = "1",
day = "13",
doi = "10.1016/j.msea.2013.10.090",
language = "English",
volume = "592",
pages = "95--101",
journal = "Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing",
issn = "0921-5093",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - The radial hardness-profile and the microstructure of railroad car axle materials treated by surface rolling, determined by novel examination methods

AU - Berecz, Tibor

AU - Balogh, L.

AU - Mészáros, I.

AU - Steinbach, Ágoston

PY - 2014/1/13

Y1 - 2014/1/13

N2 - Surface rolling is a cold-working technique used for hardening the surface of steel and ductile cast iron components. This process increases the surface hardness and improves the fatigue properties of components, so it is commonly used to treat railroad car wheel axles. The present paper examines the influence of this surface strengthening technique on the microstructure of the railroad car wheel axle material by hardness tests, optical microscopy (OM), and other novel examination methods, such as scanning electron microscopy (SEM), X-ray line profile analysis (XLPA), non-destructive magnetic evaluation (NDE) and automated electron backscatter diffraction (EBSD). The results show that surface rolling causes an increase in hardness down to a depth of ~10. mm. It is also shown, that the increase in hardness is not due to grain refinement or change in grain morphology; thus it is likely to be caused by an increase in dislocation density.

AB - Surface rolling is a cold-working technique used for hardening the surface of steel and ductile cast iron components. This process increases the surface hardness and improves the fatigue properties of components, so it is commonly used to treat railroad car wheel axles. The present paper examines the influence of this surface strengthening technique on the microstructure of the railroad car wheel axle material by hardness tests, optical microscopy (OM), and other novel examination methods, such as scanning electron microscopy (SEM), X-ray line profile analysis (XLPA), non-destructive magnetic evaluation (NDE) and automated electron backscatter diffraction (EBSD). The results show that surface rolling causes an increase in hardness down to a depth of ~10. mm. It is also shown, that the increase in hardness is not due to grain refinement or change in grain morphology; thus it is likely to be caused by an increase in dislocation density.

KW - EBSD

KW - Hardness measurement

KW - Non-destructive magnetic evaluation

KW - Scanning electron microscopy

KW - Surface hardening

KW - X-ray diffraction

UR - http://www.scopus.com/inward/record.url?scp=84887896788&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84887896788&partnerID=8YFLogxK

U2 - 10.1016/j.msea.2013.10.090

DO - 10.1016/j.msea.2013.10.090

M3 - Article

VL - 592

SP - 95

EP - 101

JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing

SN - 0921-5093

ER -