| Popis: |
Undisputedly microscopy plays a predominant role in unraveling the underpinning mechanisms in plastic deformation of materials. There are at least two reasons that hamper a straightforward correlation between microscopic structural information and mechanical properties: one fundamental and one practical reason. First, the defects affecting these properties, like dislocations, are in fact not in thermodynamic equilibrium and their behavior is very much non-linear. Second, a quantitative evaluation of the structure-property relationship can be rather difficult because of statistics. In particular, situations where there is only a small volume fraction of defects present or a very inhomogeneous distribution statistical sampling may be a problem. A major drawback of experimental research in the field of crystalline defects is that most of the microscopy work has been concentrated on static structures. |
