Atomic modelling of strengthening mechanisms due to voids and copper precipitates in α-iron

Yu N. Osetsky; D. J. Bacon; V. Mohles

doi:10.1080/14786430310001603364

Atomic modelling of strengthening mechanisms due to voids and copper precipitates in α-iron

Yu N. Osetsky, D. J. Bacon, V. Mohles

Research output: Contribution to journal › Article › peer-review

154 Scopus citations

Abstract

Recently a model has been developed by Osetsky and Bacon to study edge dislocations moving over large distances on the atomic scale. It permits investigation of motion of a dislocation under different conditions of applied shear stress with constant or variable strain rate and temperature, and in the presence of obstacles. In this paper we apply the model to study the motion of an infinite straight but flexible edge dislocation through a row of either voids or coherent copper precipitates in bcc iron. Stress-strain curves, energy barrier profile and strength characteristics of obstacles and other dislocation configuration information have been obtained from the modelling and compared with continuum treatments. Some specific atomic-scale mechanisms associated with strengthening due to voids and precipitates over a range of size have been observed and discussed.

Original language	English
Pages (from-to)	3623-3641
Number of pages	19
Journal	Philosophical Magazine
Volume	83
Issue number	31-34
DOIs	https://doi.org/10.1080/14786430310001603364
State	Published - Nov 1 2003
Externally published	Yes

Funding

This research was supported by the UK Engineering and Physical Sciences Research Council. It was undertaken when V.M. held a Fellowship of the Deutsche Forschungemeinschaft at the University of Liverpool.

Funders	Funder number
Engineering and Physical Sciences Research Council

Access to Document

10.1080/14786430310001603364

Cite this

@article{f4406c7e739f44b1b8b3309f1ae92054,

title = "Atomic modelling of strengthening mechanisms due to voids and copper precipitates in α-iron",

abstract = "Recently a model has been developed by Osetsky and Bacon to study edge dislocations moving over large distances on the atomic scale. It permits investigation of motion of a dislocation under different conditions of applied shear stress with constant or variable strain rate and temperature, and in the presence of obstacles. In this paper we apply the model to study the motion of an infinite straight but flexible edge dislocation through a row of either voids or coherent copper precipitates in bcc iron. Stress-strain curves, energy barrier profile and strength characteristics of obstacles and other dislocation configuration information have been obtained from the modelling and compared with continuum treatments. Some specific atomic-scale mechanisms associated with strengthening due to voids and precipitates over a range of size have been observed and discussed.",

author = "Osetsky, {Yu N.} and Bacon, {D. J.} and V. Mohles",

year = "2003",

month = nov,

day = "1",

doi = "10.1080/14786430310001603364",

language = "English",

volume = "83",

pages = "3623--3641",

journal = "Philosophical Magazine",

issn = "1478-6435",

publisher = "Taylor and Francis Group",

number = "31-34",

}

TY - JOUR

T1 - Atomic modelling of strengthening mechanisms due to voids and copper precipitates in α-iron

AU - Osetsky, Yu N.

AU - Bacon, D. J.

AU - Mohles, V.

PY - 2003/11/1

Y1 - 2003/11/1

N2 - Recently a model has been developed by Osetsky and Bacon to study edge dislocations moving over large distances on the atomic scale. It permits investigation of motion of a dislocation under different conditions of applied shear stress with constant or variable strain rate and temperature, and in the presence of obstacles. In this paper we apply the model to study the motion of an infinite straight but flexible edge dislocation through a row of either voids or coherent copper precipitates in bcc iron. Stress-strain curves, energy barrier profile and strength characteristics of obstacles and other dislocation configuration information have been obtained from the modelling and compared with continuum treatments. Some specific atomic-scale mechanisms associated with strengthening due to voids and precipitates over a range of size have been observed and discussed.

AB - Recently a model has been developed by Osetsky and Bacon to study edge dislocations moving over large distances on the atomic scale. It permits investigation of motion of a dislocation under different conditions of applied shear stress with constant or variable strain rate and temperature, and in the presence of obstacles. In this paper we apply the model to study the motion of an infinite straight but flexible edge dislocation through a row of either voids or coherent copper precipitates in bcc iron. Stress-strain curves, energy barrier profile and strength characteristics of obstacles and other dislocation configuration information have been obtained from the modelling and compared with continuum treatments. Some specific atomic-scale mechanisms associated with strengthening due to voids and precipitates over a range of size have been observed and discussed.

UR - http://www.scopus.com/inward/record.url?scp=0347527254&partnerID=8YFLogxK

U2 - 10.1080/14786430310001603364

DO - 10.1080/14786430310001603364

M3 - Article

AN - SCOPUS:0347527254

SN - 1478-6435

VL - 83

SP - 3623

EP - 3641

JO - Philosophical Magazine

JF - Philosophical Magazine

IS - 31-34

ER -

Atomic modelling of strengthening mechanisms due to voids and copper precipitates in α-iron

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this