Blunting of a brittle crack at grain boundaries: An atomistic study in BCC Iron

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Blunting of a brittle crack at grain boundaries: An atomistic study in BCC Iron. / Terentyev, Dmitry; Gao, F.; Bonny, Giovanni (Peer reviewer).

In: Materials Science and Engineering: A, Vol. 576, 08.2013, p. 231-238.

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Terentyev, Dmitry ; Gao, F. ; Bonny, Giovanni. / Blunting of a brittle crack at grain boundaries: An atomistic study in BCC Iron. In: Materials Science and Engineering: A. 2013 ; Vol. 576. pp. 231-238.

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@article{9601f830287a43689748ae512b1ca7f2,
title = "Blunting of a brittle crack at grain boundaries: An atomistic study in BCC Iron",
abstract = "We investigated the interaction of a brittle crack with low and high angle grain boundaries in BCC Iron by means of atomistic simulations at finite temperatures. It is demonstrated that both low and high angle grain boundaries exhibit resistance to brittle crack propagation. The resistance is controlled by the ability of a grain boundary interface to structurally transform, which can involve grain boundary sliding or the emission of misfit dislocations. Here, we observed deformation mechanisms which generally correspond to those reported in experiments for Fe–Si polycrystals. We show that low and high angle grain boundaries exhibit different intensities of plastic deformation upon interaction with a brittle crack, thereby offering different resistance to its propagation.",
keywords = "Metal, Crack, Grain boundary, Fracture, Twinning deformation",
author = "Dmitry Terentyev and F. Gao and Giovanni Bonny",
note = "Score = 10",
year = "2013",
month = "8",
doi = "10.1016//j.msea.2013.04.012",
language = "English",
volume = "576",
pages = "231--238",
journal = "Materials Science and Engineering: A",
issn = "0921-5093",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Blunting of a brittle crack at grain boundaries: An atomistic study in BCC Iron

AU - Terentyev, Dmitry

AU - Gao, F.

A2 - Bonny, Giovanni

N1 - Score = 10

PY - 2013/8

Y1 - 2013/8

N2 - We investigated the interaction of a brittle crack with low and high angle grain boundaries in BCC Iron by means of atomistic simulations at finite temperatures. It is demonstrated that both low and high angle grain boundaries exhibit resistance to brittle crack propagation. The resistance is controlled by the ability of a grain boundary interface to structurally transform, which can involve grain boundary sliding or the emission of misfit dislocations. Here, we observed deformation mechanisms which generally correspond to those reported in experiments for Fe–Si polycrystals. We show that low and high angle grain boundaries exhibit different intensities of plastic deformation upon interaction with a brittle crack, thereby offering different resistance to its propagation.

AB - We investigated the interaction of a brittle crack with low and high angle grain boundaries in BCC Iron by means of atomistic simulations at finite temperatures. It is demonstrated that both low and high angle grain boundaries exhibit resistance to brittle crack propagation. The resistance is controlled by the ability of a grain boundary interface to structurally transform, which can involve grain boundary sliding or the emission of misfit dislocations. Here, we observed deformation mechanisms which generally correspond to those reported in experiments for Fe–Si polycrystals. We show that low and high angle grain boundaries exhibit different intensities of plastic deformation upon interaction with a brittle crack, thereby offering different resistance to its propagation.

KW - Metal

KW - Crack

KW - Grain boundary

KW - Fracture

KW - Twinning deformation

UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_136504

UR - http://knowledgecentre.sckcen.be/so2/bibref/11744

U2 - 10.1016//j.msea.2013.04.012

DO - 10.1016//j.msea.2013.04.012

M3 - Article

VL - 576

SP - 231

EP - 238

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

SN - 0921-5093

ER -

ID: 153821