Defect interaction summary between edge dislocations and &lt;112&gt;-axis symmetric tilt grain boundaries in copper on activation barriers and critical stresses

Li, Li; Liu, Lijun; Shibutania, Yoji

doi:10.1016/j.ijplas.2021.103153

Cited by 14 publications

(3 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16) The initial and final states which are necessary to implement the NEB were constructed by the loading and unloading process. 17,2830) NEB method was also used to calculate £ s , £ us and £ ut . The quick-min method was used for the damped dynamics minimizer with a spring constant of 1 eV/¡ and 18 replicas.…”

Section: Simulation Schemementioning

confidence: 99%

“…1,3,1220) Absorption, transmission, and pile-up are all alternatives to the interactions which may be determined by the type of dislocations, kinds of GBs, material elements, temperature, and any combination of previous factors. 1,3,17,21) For example, a screw dislocation will be spontaneously absorbed by the CTB when the incident dislocation touches the CTB plane in Al. While further loading is necessary to realize the subsequent absorption or transmission in other face-centered metals (FCC), such as Ni and Cu.…”

Section: Introductionmentioning

confidence: 99%

“…829 to 834 © 2022 The Japan Institute of Metals and Materials with NEB method. 17) In this work, we further consider the influence of the material selection on the energy barriers as well as the CISS.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Defect Interactions between Screw Dislocations and Coherent Twin Boundaries in Several fcc Materials

Liu

Shibutani

2022

Mater. Trans.

Self Cite

View full text Add to dashboard Cite

The atomistic interactions between screw dislocations and coherent twin boundaries were investigated in face-centered metals of Al, Cu, Ni, Au, Ag, and Pd using molecular dynamics and nudged elastic band method. The interaction mechanism was affected by stable and unstable stacking fault energies predicted by various potentials. In Al, Cu, and Pd, screw dislocation would be absorbed by the twin boundary. However, transmissions were observed in Ni, Au, Ag, and Pd with another potential. It was found that both the critical interaction stress and energy barrier decreased as the reciprocal of the difference between unstable and stable stacking fault energies increased. Activation volumes and strain rate sensitivities were estimated around 14 b 3 to 27 b 3 , where b is the Burgers vector, and 0.011 to 0.023, respectively. The results for Cu and Ni were further compared with experiments and showed good agreements.

show abstract

Section: Simulation Schemementioning

confidence: 99%