学術雑誌論文

学術雑誌論文

text

PLoS ONE. 2013, 8(4), p. e60586

“Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron

PLOS

英語

text

2013-04-11

https://doi.org/10.1371/journal.pone.0060586

Ishii A, Li J, Ogata S (2013) “Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron. PLOS ONE 8(4): e60586. https://doi.org/10.1371/journal.pone.0060586

Dislocation pipe diffusion seems to be a well-established phenomenon. Here we demonstrate an unexpected effect, that the migration of interstitials such as carbon in iron may be accelerated not in the dislocation line direction , but in a conjugate diffusion direction. This accelerated random walk arises from a simple crystallographic channeling effect. is a function of the Burgers vector b, but not , thus a dislocation loop possesses the same everywhere. Using molecular dynamics and accelerated dynamics simulations, we further show that such dislocation-core-coupled carbon diffusion in iron has temperature-dependent activation enthalpy like a fragile glass. The 71° mixed dislocation is the only case in which we see straightforward pipe diffusion that does not depend on dislocation mobility.

© 2013 Ishii et al. This article is licensed under a Creative Commons Attribution 4.0 International License.

89303

“Conjugate Channeling” Effect in Dislocation Core Diffusion: Carbon Transport in Dislocated BCC Iron

PLOS

英語

2013-04-11

PLoS ONE

8

4

e60586

https://doi.org/10.1371/journal.pone.0060586

https://hdl.handle.net/11094/89303