Possible origin of the discrepancy in Peierls stresses of fcc metals : First-principles simulations of dislocation mobility in aluminum

@inproceedings{Shin2013PossibleOO,
  title={Possible origin of the discrepancy in Peierls stresses of fcc metals : First-principles simulations of dislocation mobility in aluminum},
  author={Ilgyou Shin and Emily A. Carter},
  year={2013}
}
Dislocation motion governs the strength and ductility of metals, and the Peierls stress (σp) quantifies dislocation mobility. σp measurements carry substantial uncertainty in face-centered cubic (fcc) metals, and σp values can differ by up to two orders of magnitude. We perform first-principles simulations based on orbital-free density functional theory (OFDFT) to calculate the most accurate currently possible σp for the motion of 12 〈110〉 {111} dislocations in fcc Al. We predict the σps of… CONTINUE READING