Journal article
Mechanism maps for cyclic plasticity and fatigue of single phase materials
Mechanism maps for strain-hardening and fatigue in single phase materials are introduced for isothermal cyclic deformation at constant amplitudes of plastic strain in tension-compression. The maps are drawn for single crystals and polycrystals in diagrams of plastic strain vs cycle number. The successive stages of structural evolution and cracking appear as two-dimensional fields.
The dominant micro-mechanicals characeristics of each field can be described by modifications of the theory of two-phase materials. A more complete theory of the maps remains to be developed; but a partial prediction of the effects of temperature, strain-rate and crystal structure on the field pattern is already possible, of the lattice friction and cross-slip of screw dislocations are invoked.
The maps give a unified view of the basic mechanisms of work-hardening and fatigue, and they provide useful criteria for design against fatigue.
Language: | English |
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Year: | 1990 |
Pages: | 1221-1239 |
ISSN: | 18732879 and 09567151 |
Types: | Journal article |
DOI: | 10.1016/0956-7151(90)90194-L |