Strengthening due to Cr-rich precipitates in Fe-Cr alloys: Effect of temperature and precipitate composition

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Strengthening due to Cr-rich precipitates in Fe-Cr alloys: Effect of temperature and precipitate composition. / Terentyev, Dmitry; Hafez Haghighat, S.M.; Schäublin, R.; Chaouadi, Rachid (Peer reviewer); Malerba, Lorenzo (Peer reviewer).

In: Journal of Applied Physics, Vol. 107, No. 6, 26.03.2010, p. 0618061-0618068.

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Terentyev, Dmitry ; Hafez Haghighat, S.M. ; Schäublin, R. ; Chaouadi, Rachid ; Malerba, Lorenzo. / Strengthening due to Cr-rich precipitates in Fe-Cr alloys: Effect of temperature and precipitate composition. In: Journal of Applied Physics. 2010 ; Vol. 107, No. 6. pp. 0618061-0618068.

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@article{de39d5ab9c7541a296019590f7d07856,
title = "Strengthening due to Cr-rich precipitates in Fe-Cr alloys: Effect of temperature and precipitate composition",
abstract = "Molecular dynamics MD simulations were carried out to study the interaction between nanometric Cr precipitates and a 1/2{110} edge dislocation in pure Fe and Fe-9 at. {\%} Cr random alloy. The aim of this work is to estimate the variation in the pinning strength of the Cr precipitate as a function of temperature, its chemical composition and the matrix composition in which the precipitate is embedded. The dislocation was observed to shear Cr precipitates rather than by-pass via the formation of the Orowan loop, even though a pronounced screw dipole was emerged in the reactions with the precipitates of size larger than 4.5 nm. The screw arms of the formed dipole were not observed to climb thus no point defects were left inside the sheared precipitates, irrespective of simulation temperature.",
keywords = "precipitation, Fe-Cr, dislocation",
author = "Dmitry Terentyev and {Hafez Haghighat}, S.M. and R. Sch{\"a}ublin and Rachid Chaouadi and Lorenzo Malerba",
note = "Score = 10",
year = "2010",
month = "3",
day = "26",
doi = "10.1063/1.3340522",
language = "English",
volume = "107",
pages = "0618061--0618068",
journal = "Journal of Applied Physics",
issn = "0021-8979",
publisher = "AIP - American Institute of Physics",
number = "6",

}

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TY - JOUR

T1 - Strengthening due to Cr-rich precipitates in Fe-Cr alloys: Effect of temperature and precipitate composition

AU - Terentyev, Dmitry

AU - Hafez Haghighat, S.M.

AU - Schäublin, R.

A2 - Chaouadi, Rachid

A2 - Malerba, Lorenzo

N1 - Score = 10

PY - 2010/3/26

Y1 - 2010/3/26

N2 - Molecular dynamics MD simulations were carried out to study the interaction between nanometric Cr precipitates and a 1/2{110} edge dislocation in pure Fe and Fe-9 at. % Cr random alloy. The aim of this work is to estimate the variation in the pinning strength of the Cr precipitate as a function of temperature, its chemical composition and the matrix composition in which the precipitate is embedded. The dislocation was observed to shear Cr precipitates rather than by-pass via the formation of the Orowan loop, even though a pronounced screw dipole was emerged in the reactions with the precipitates of size larger than 4.5 nm. The screw arms of the formed dipole were not observed to climb thus no point defects were left inside the sheared precipitates, irrespective of simulation temperature.

AB - Molecular dynamics MD simulations were carried out to study the interaction between nanometric Cr precipitates and a 1/2{110} edge dislocation in pure Fe and Fe-9 at. % Cr random alloy. The aim of this work is to estimate the variation in the pinning strength of the Cr precipitate as a function of temperature, its chemical composition and the matrix composition in which the precipitate is embedded. The dislocation was observed to shear Cr precipitates rather than by-pass via the formation of the Orowan loop, even though a pronounced screw dipole was emerged in the reactions with the precipitates of size larger than 4.5 nm. The screw arms of the formed dipole were not observed to climb thus no point defects were left inside the sheared precipitates, irrespective of simulation temperature.

KW - precipitation

KW - Fe-Cr

KW - dislocation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_104938

UR - http://knowledgecentre.sckcen.be/so2/bibref/6848

U2 - 10.1063/1.3340522

DO - 10.1063/1.3340522

M3 - Article

VL - 107

SP - 618061

EP - 618068

JO - Journal of Applied Physics

JF - Journal of Applied Physics

SN - 0021-8979

IS - 6

ER -

ID: 316778