Representation of the microstructure of pearlitic steels for DEM simulations of fatigue

H. Davoodi Jooneghani*, K. Six, S. S. Sharifi, M. C. Poletti, G. Trummer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The fatigue behavior of pearlitic steels in wheel-rails is correlated to the microstructure. However, existing models do barely take this correlation into account. In this work, we propose a hierarchical meshing to describe the microstructure of pearlitic steels. The mesh includes grain and block/colony boundaries, lamellae orientations, and orientation perpendicular to lamellae. We use the Voronoi Tessellation method to generate elements with the specific area fraction distribution for pearlite colony areas. The colony and block information is obtained from SEM and EBSD measurements of R260 steel to construct the mesh that represents the microstructure. Finally, we obtained the deformed microstructure via simple geometrical shearing. This meshing method is the first step for modeling fatigue crack growth anisotropy due to plastic deformation.

Original languageEnglish
Article number205228
JournalWear
Volume540-541
DOIs
Publication statusPublished - 15 Mar 2024

Keywords

  • Fatigue crack growth
  • Microstructure representation
  • Pearlitic steel
  • Voronoi tessellation method
  • Wheel and rail contact

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Representation of the microstructure of pearlitic steels for DEM simulations of fatigue'. Together they form a unique fingerprint.

Cite this