Room-temperature solid solution softening in Fe-V binary system

Jihye Park, Jae Hyeok Shim, Young Kook Lee

Research output: Contribution to journalArticle

1 Citation (Scopus)

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 100-300MPa 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.

Original languageEnglish
Pages (from-to)7-11
Number of pages5
JournalMetals and Materials International
Volume22
Issue number1
DOIs
Publication statusPublished - 2016 Jan 1

Fingerprint

softening
Solid solutions
solid solutions
Edge dislocations
edge dislocations
room temperature
Atoms
solutes
atoms
Temperature
hardening
shear stress
Hardening
Molecular dynamics
Shear stress
molecular dynamics
Computer simulation
matrices
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

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title = "Room-temperature solid solution softening in Fe-V binary system",
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 100-300MPa 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.",
author = "Jihye Park and Shim, {Jae Hyeok} and Lee, {Young Kook}",
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Room-temperature solid solution softening in Fe-V binary system. / Park, Jihye; Shim, Jae Hyeok; Lee, Young Kook.

In: Metals and Materials International, Vol. 22, No. 1, 01.01.2016, p. 7-11.

Research output: Contribution to journalArticle

TY - JOUR

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N2 - 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 100-300MPa 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.

AB - 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 100-300MPa 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.

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