Effect of T-stress on dislocation emission in iron

We compare continuum predictions for dislocation emission from a crack tip loaded under mode I, biaxial conditions with atomistic results for bcc iron. The simulations validate the continuum prediction that, as the T-stress increases, so does the threshold for dislocation nucleation; hence, the prop...

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Bibliographic Details
Published in:	Scripta materialia Vol. 50; no. 4; pp. 483 - 487
Main Authors:	Beltz, Glenn E., Machová, Anna
Format:	Journal Article
Language:	English
Published:	New York, NY Elsevier Ltd 01-02-2004 Elsevier Science
Subjects:	Atomistic simulation Condensed matter: structure, mechanical and thermal properties Defects and impurities in crystals; microstructure Dislocation nucleation Exact sciences and technology Fracture Iron Physics Structure of solids and liquids; crystallography T-stress Theories and models of crystal defects Atomistic simulation Fracture Iron Dislocation nucleation T-stress Crystal defects Molecular dynamics Theoretical study Crack tip Dislocations
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Summary:	We compare continuum predictions for dislocation emission from a crack tip loaded under mode I, biaxial conditions with atomistic results for bcc iron. The simulations validate the continuum prediction that, as the T-stress increases, so does the threshold for dislocation nucleation; hence, the propensity for brittle response increases.
Bibliography:	ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	1359-6462 1872-8456
DOI:	10.1016/j.scriptamat.2003.10.030