An RVE-Based Study of the Effect of Martensite Banding on Damage Evolution in Dual Phase Steels

Emin Erkan Asik, Emin Semih Perdahcioglu*, Ton van den Boogaard

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
18 Downloads (Pure)

Abstract

The intent of this work is to numerically investigate the effect of second phase morphology on damage evolution characteristics of dual-phase (DP) steels. A strain gradient enhanced crystal plasticity framework is used in order to capture the deformation heterogeneity caused by lattice orientations and microstructural size effects. The investigation is focused on two different martensite
distributions (banded and random) that are relevant for industrial applications. The effects of martensite morphology are compared by artificially generated 2D plane strain microstructures with initial void content. The Representative volume elements (RVEs) are subjected to tensile deformation imposed by periodic boundary conditions. Evolution of voids are analyzed individually as well as a
whole and characterized with respect to average axial strain. It is found that during stretching voids exhibit varying evolution characteristics due to generation of inhomogeneous strain fields within the structure. The behavior of individual voids shows that the stress-state surrounding the void is different from the imposed far field macroscopic stress-state. The voids at the ferrite martensite interface and in ferrite grains of the randomly distributed martensite grow more than in the banded structure. On the other hand, voids formed by martensite cracking growth shows an opposite trend.
Original languageEnglish
Article number1795
Number of pages24
JournalMaterials
Volume13
Issue number7
DOIs
Publication statusPublished - 10 Apr 2020

Keywords

  • Crystal plasticity
  • Dual phase
  • Martensite morphology
  • Polycrystalline material
  • Steel
  • Strain gradient plasticity
  • Void growth

Cite this