Deformation of nanovoid in a single crystal aluminum

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Void growth and coalescence is fundamental to understanding how damage evolves in metal systems. In ductile materials, fracture involves void nucleation, growth and coalescence. In this contribution, void growth has been investigated as a function of crystallographic loading orientation coupled with strain rate and cell size effects for single crystal aluminum. Molecular dynamics simulations were used to examine void growth in single crystal Al for different strain rates, void sizes, crystal orientations and simulation cell sizes. In particular, uniaxial tensile loading of different crystal orientations is used to capture the influence of Schmid and non-Schmid effects, and single slip vs multiple slip regimes. The simulation results show how crystallographic orientation affects the yield stress corresponding to dislocation nucleation from the void surface in perfect FCC lattice. A size scale effect related to the volume-averaged yield stress in the specimen was observed. The effect of crystallographic orientation was evident as different dislocation patterns/shear loops occurred for different loading orientations. Last, this study provides fodder for understanding the role of resolved stress components and loading orientation on the nucleation and growth of shear loops.

Original languageEnglish (US)
Title of host publicationMaterials Science and Technology Conference and Exhibition 2010, MS and T'10
Pages924-933
Number of pages10
StatePublished - Dec 1 2010
EventMaterials Science and Technology Conference and Exhibition 2010, MS and T'10 - Houston, TX, United States
Duration: Oct 17 2010Oct 21 2010

Publication series

NameMaterials Science and Technology Conference and Exhibition 2010, MS and T'10
Volume2

Other

OtherMaterials Science and Technology Conference and Exhibition 2010, MS and T'10
CountryUnited States
CityHouston, TX
Period10/17/1010/21/10

Keywords

  • Atomistic simulation
  • Orientation effects
  • Void growth

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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  • Cite this

    Bhatia, M. A., Tschopp, M. A., Solanki, K. N., Moitra, A., & Horstemeyer, M. F. (2010). Deformation of nanovoid in a single crystal aluminum. In Materials Science and Technology Conference and Exhibition 2010, MS and T'10 (pp. 924-933). (Materials Science and Technology Conference and Exhibition 2010, MS and T'10; Vol. 2).