Inclined dislocation emission versus brittle extension at crack tip

Conference · · TMS (The Metallurgical Society) Paper Selection; (USA)

OSTI ID:5308500

Chang, S J; Ohr, S M ^[1]

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1. Oak Ridge National Laboratory, TN (USA)

Dislocation emission from a crack tip along an inclined direction from the crack plane results in blunting of the crack tip. A dislocation free zone (DFZ) is formed. Additional dislocations are emitted from the blunt crack tip. The solution for the problem of dislocation pileup at a blunt crack tip with a DFZ has been obtained by applying the extended Wiener-Hopf technique to the pileup integral equation. A DFZ theory of fracture was developed earlier for the dislocation generation versus brittle fracture at the crack tip along the plane of the crack. This solution has been used to derive the critical K values for the inclined dislocation emission versus brittle extension at the blunt crack tip.

• OSTI ID: 5308500
• Report Number(s): CONF-840909--
• Conference Information: Journal Name: TMS (The Metallurgical Society) Paper Selection; (USA) Journal Volume: 56
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
BRITTLENESS
CORRELATIONS
CRACK PROPAGATION
CRACKS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELEMENTS
EQUATIONS
FAILURES
FRACTURES
LINE DEFECTS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
METALS