The Effect of Crystallographic Orientation on Void Growth: A Molecular Dynamics Study

M. A. Bhatia, K. N. Solanki, A. Moitra, M. A. Tschopp

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

In ductile materials, fracture involves void nucleation, growth and coalescence. The objective of this research is to understand how crystallographic orientation influences void growth in uniaxial tensile deformation of aluminum. We used molecular dynamics to simulate void growth in a spherical void embedded cubic specimen with periodic boundary conditions under remote uniaxial tension. The simulation results reveal how crystallographic orientation affects the yield stress and void growth corresponding to dislocation nucleation from the void surface and resulting in shear loops in perfect FCC lattice. Varying dislocation patterns/shear loops occur according to the specimens different orientations, thereby affirming the effect of crystallographic orientation. Consequently, atomistic simulations of this type can indeed inform continuum void growth models for application in multiscale models.

Original languageEnglish (US)
Title of host publicationSupplemental Proceedings
Subtitle of host publicationMaterials Fabrication, Properties, Characterization, and Modeling
PublisherJohn Wiley and Sons Inc.
Pages577-584
Number of pages8
Volume2
ISBN (Electronic)9781118062142
ISBN (Print)9781118029466
DOIs
StatePublished - Apr 20 2011
Externally publishedYes

Keywords

  • Aluminum
  • Dislocation loop
  • Molecular Dynamics
  • Void Growth

ASJC Scopus subject areas

  • Engineering(all)
  • Materials Science(all)

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