Simulation of dislocation penetration through a general low-angle grain boundary

B. Liu, P. Eisenlohr, F. Roters, D. Raabe

Research output: Contribution to journalArticle

  • 29 Citations

Abstract

The interaction of dislocations with low-angle grain boundaries (LAGBs) is considered one important contribution to the mechanical strength of metals. Although LAGBs have been frequently observed in metals, little is known about how they interact with free dislocations that mainly carry the plastic deformation. Using discrete dislocation dynamics simulations, we are able to quantify the resistance of a LAGB - idealized as three sets of dislocations that form a hexagonal dislocation network - against lattice dislocation penetration, and examine the associated dislocation processes. Our results reveal that such a coherent internal boundary can massively obstruct and even terminate dislocation transmission and thus make a substantial contribution to material strength.

Original languageEnglish (US)
Pages (from-to)5380-5390
Number of pages11
JournalActa Materialia
Volume60
Issue number13-14
DOIs
StatePublished - Aug 2012
Externally publishedYes

Profile

Grain boundaries
Dislocations (crystals)
Metals
Carbimazole
Traffic Accidents
Transaminases
Plastic deformation
Cholesterol
Strength of materials
Computer simulation

Keywords

  • Dislocation dynamics
  • Dislocation processes
  • Hexagonal dislocation network
  • Low-angle grain boundary
  • Strength

ASJC Scopus subject areas

  • Ceramics and Composites
  • Metals and Alloys
  • Polymers and Plastics
  • Electronic, Optical and Magnetic Materials

Cite this

Simulation of dislocation penetration through a general low-angle grain boundary. / Liu, B.; Eisenlohr, P.; Roters, F.; Raabe, D.

In: Acta Materialia, Vol. 60, No. 13-14, 08.2012, p. 5380-5390.

Research output: Contribution to journalArticle

Liu, B.; Eisenlohr, P.; Roters, F.; Raabe, D. / Simulation of dislocation penetration through a general low-angle grain boundary.

In: Acta Materialia, Vol. 60, No. 13-14, 08.2012, p. 5380-5390.

Research output: Contribution to journalArticle

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