Void growth in high strength aluminium alloy single crystals: A CPFEM based study

Umair Asim, M. Amir Siddiq, Murat Demiral

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Abstract

High strength aluminium alloys are widely used in aerospace components which are
produced through forming and joining processes. The ductile failure in these metals occur
due to the evolution and accumulation of microscopic defects, such as micro-voids and
shear bands. Present work investigates the underlying physical mechanisms during ductile
failure by performing a rigorous fully-validated three dimensional crystal plasticity finite
element studies in aluminium alloy single crystals. Representative volume element (RVE)
based simulations of single crystalline aluminium alloys (AA-5xxx) with different void
geometries and orientations have been performed. Both local and nonlocal crystal plasticity
constitutive models have been implemented in finite element framework and are used to
seek new insights and interrelationship among void growth, initial porosity, initial void size,
plastic anisotropy, and local/nonlocal size effects.
Original languageEnglish
Article number035010
Number of pages19
JournalModelling and Simulation in Materials Science and Engineering
Volume25
Issue number3
DOIs
Publication statusPublished - 2 Mar 2017

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Keywords

  • void growth
  • non-local crystal plasticity theory
  • single crystal aluminium alloy
  • lattice rotation

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