The flow stress contribution of the dislocation 'forest' in bcc lattices

Wolfgang Püschl

doi:10.1080/095008300176164

The flow stress contribution of the dislocation 'forest' in bcc lattices

Wolfgang Püschl

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

The athermal flow stress contribution by junction reactions of a glide dislocation with a 'forest' of density ? is usually written as ? = ??b?1/2. The strength coefficient ? has been computed for the bcc lattice by virtual displacement of triple nodes following the method of Püschl et al. (1982, Physica status solidi (a), 74, 211). In the isotropic approximation, the values for glide dislocations with 0, 30, 60 and 90° character are as ? = 0.18, 0.21, 0.19 and 0.22 respectively. A comparison with values calculated previously by Frydman is made, and good agreement is found when differences in the cut-off radii of the linear elastic solution are accounted for.

Original language	English
Pages (from-to)	199-203
Number of pages	5
Journal	Philosophical Magazine Letters
Volume	80
Issue number	4
DOIs	https://doi.org/10.1080/095008300176164
Publication status	Published - 2000

Austrian Fields of Science 2012

1030 Physics, Astronomy

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10.1080/095008300176164

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title = "The flow stress contribution of the dislocation 'forest' in bcc lattices",

abstract = "The athermal flow stress contribution by junction reactions of a glide dislocation with a 'forest' of density ? is usually written as ? = ??b?1/2. The strength coefficient ? has been computed for the bcc lattice by virtual displacement of triple nodes following the method of P{\"u}schl et al. (1982, Physica status solidi (a), 74, 211). In the isotropic approximation, the values for glide dislocations with 0, 30, 60 and 90° character are as ? = 0.18, 0.21, 0.19 and 0.22 respectively. A comparison with values calculated previously by Frydman is made, and good agreement is found when differences in the cut-off radii of the linear elastic solution are accounted for.",

author = "Wolfgang P{\"u}schl",

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year = "2000",

doi = "10.1080/095008300176164",

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AU - Püschl, Wolfgang

N1 - DOI: 10.1080/095008300176164 Coden: PMLEE Affiliations: Institut für Materialphysik, University of Vienna, Boltzmanngasse 5, A-1090 Vienna, Austria Adressen: Püschl, W.; Institut für Materialphysik; University of Vienna; Boltzmanngasse 5 A-1090 Vienna, Austria; email: [email protected] Import aus Scopus: 2-s2.0-0034174644 17.12.2007: Datenanforderung 2031 (Import Sachbearbeiter)

PY - 2000

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N2 - The athermal flow stress contribution by junction reactions of a glide dislocation with a 'forest' of density ? is usually written as ? = ??b?1/2. The strength coefficient ? has been computed for the bcc lattice by virtual displacement of triple nodes following the method of Püschl et al. (1982, Physica status solidi (a), 74, 211). In the isotropic approximation, the values for glide dislocations with 0, 30, 60 and 90° character are as ? = 0.18, 0.21, 0.19 and 0.22 respectively. A comparison with values calculated previously by Frydman is made, and good agreement is found when differences in the cut-off radii of the linear elastic solution are accounted for.

AB - The athermal flow stress contribution by junction reactions of a glide dislocation with a 'forest' of density ? is usually written as ? = ??b?1/2. The strength coefficient ? has been computed for the bcc lattice by virtual displacement of triple nodes following the method of Püschl et al. (1982, Physica status solidi (a), 74, 211). In the isotropic approximation, the values for glide dislocations with 0, 30, 60 and 90° character are as ? = 0.18, 0.21, 0.19 and 0.22 respectively. A comparison with values calculated previously by Frydman is made, and good agreement is found when differences in the cut-off radii of the linear elastic solution are accounted for.

U2 - 10.1080/095008300176164

DO - 10.1080/095008300176164

M3 - Article

SN - 0950-0839

VL - 80

SP - 199

EP - 203

JO - Philosophical Magazine Letters

JF - Philosophical Magazine Letters

IS - 4

ER -

The flow stress contribution of the dislocation 'forest' in bcc lattices

Abstract

Austrian Fields of Science 2012

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