Room-Temperature Solid Solution Softening in Fe-V Binary System

Authors
Park, JihyeShim, Jae-HyeokLee, Young-Kook
Issue Date
2016-01
Publisher
KOREAN INST METALS MATERIALS
Citation
METALS AND MATERIALS INTERNATIONAL, v.22, no.1, pp.7 - 11
Abstract
Molecular dynamics simulations of the glide of an edge dislocation in the bcc matrix of Fe-V alloys were performed to investigate the room-temperature solid solution softening by V atoms. For this purpose, the glide velocity of an edge dislocation was calculated as a function of V concentration under the shear stresses of 100-300 MPa using the Fe-V cross-potential constructed newly in the present study. Whereas the solid solution hardening occurred as the V concentration is less than 0.13 at% or more than 0.5 at%, the room-temperature solid solution softening was observed in Fe-(0.13-0.5) at% V alloys. The solid solution softening occurring in Fe-(0.13-0.5) at% V alloys was caused by the accelerated growth velocity of kinks by solute V atoms. The increase in kink velocity happened when the interatomic distance between solute V atoms was similar to the length of dislocation kinks.
Keywords
EDGE DISLOCATION; DEFORMATION; ELEMENTS; EDGE DISLOCATION; DEFORMATION; ELEMENTS; computer simulation; dislocation; alloys; solid solution softening; molecular dynamics
ISSN
1598-9623
URI
https://pubs.kist.re.kr/handle/201004/124550
DOI
10.1007/s12540-015-5114-2
Appears in Collections:
KIST Article > 2016
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