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Modelling crack tip plastic zones and brittle-ductile transitions

Abstract:

Plasticity at crack tips has been modelled as self-organising arrays of dislocations emitted from a source near the crack tip. The model takes into account dislocation shielding, but not blunting. For materials where dislocation motion is slow, and the friction stress is high, the modelled arrays are far from equilibrium. The brittle-ductile transition is then controlled by dislocation velocity. If dislocation motion is fast, and there is a substantial dislocation pinning stress, tau(f), the ...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Role:
Author
Publisher:
Minerals, Metals and Materials Soc (TMS)
Pages:
137-145
Publication date:
1996-01-01
URN:
uuid:9b60285c-4d86-4942-8844-a44f8ebb2367
Source identifiers:
21518
Local pid:
pubs:21518
ISBN:
0-87339-381-3

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