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Plastic instabilities and dislocation patterns. (English) Zbl 1004.74021

Martinez-Mardones, J. (ed.) et al., Materials instabilities. Proceedings of the 1st Latin American summer school, Valparaiso, Chile, November 30-December 4, 1998. Singapore: World Scientific. 311-326 (2000).
Strain localization and dislocation microstructure formation are typical features of plastic deformation of metals and alloys. Plastic deformation occurs due to the glide of dislocations, and, although dislocation distributions are rather uniform at their onset, they usually become unstable when deformation proceeds, and then undergo successive transitions towards various types of microstructures such as cells, deformation bands, persistent slip bands, labyrinth structures, etc. This phenomenon is experimentally well documented, but, despite a huge number of theoretical investigations and modelling attempts, it is still poorly understood. Here, the author presents a mesoscopic approach based on rate theories, and describes the formation of dislocation microstructure induced by plastic instabilities.
For the entire collection see [Zbl 0958.00040].
Reviewer: G.Olenev (Tartu)

MSC:

74C99 Plastic materials, materials of stress-rate and internal-variable type
74R20 Anelastic fracture and damage
74A60 Micromechanical theories
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