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Dislocation viscoplasticity aspects of material fracturing

✍ Scribed by R.W. Armstrong

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
847 KB
Volume
77
Category
Article
ISSN
0013-7944

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✦ Synopsis

Dislocation viscoplasticity, whether occurring before, during, or after the appearance of cracking, and with energy requirement additional to needed crack surface energy, has proved to be the bane of simplistic strength/energy evaluations applied to the fracturing properties of solid materials. George Irwin, in later years, turned his attention to such crack-effected viscoplasticity consideration in relation to the complex microstructural aspects of fracturing behaviors obtained for nuclear pressure vessel steels. The work is reviewed here with a broader research focus on dislocation plasticity aspects of fracturing behaviors, at ever smaller crack sizes, for a wider range of materials, especially, of relatively greater hardness.

πŸ“œ SIMILAR VOLUMES

Viscoplasticity of metals: Comments on s
Viscoplasticity of metals: Comments on statistical approaches to dislocation reactions
✍ M. HΓΌtter πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 182 KB

Dislocations, i.e., line defects in the crystal structure, are at the origin of viscoplastic deformation in metals. In the literature, the statistical approaches to the dislocation dynamics in terms of dislocation densities are often used. There, the key ingredient for modeling the ubiquitous strain