Dislocation motion cannot be directly observed in bulk metals undergoing plastic deformation; indirect measurements must be performed. Drag forces on mobile dislocations dissipate mechanical energy into thermal energy; an experimental method has been developed to measure this dissipation. Experimental data are exploited in conjunction with a model of energy dissipation by dislocation motion; information about the mean density and mean velocity of mobile dislocations can thus be derived. results obtained on aluminium specimens are presented.
Dislocation dynamics by measurements of dissipation
BEGHI, MARCO
1990-01-01
Abstract
Dislocation motion cannot be directly observed in bulk metals undergoing plastic deformation; indirect measurements must be performed. Drag forces on mobile dislocations dissipate mechanical energy into thermal energy; an experimental method has been developed to measure this dissipation. Experimental data are exploited in conjunction with a model of energy dissipation by dislocation motion; information about the mean density and mean velocity of mobile dislocations can thus be derived. results obtained on aluminium specimens are presented.File in questo prodotto:
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