So far, when discussing the properties of materials we tacitly assumed that the atoms of solids remain essentially stationary. From time to time we implied, however, that the behavior of solids is affected by the thermally induced vibrations of atoms. The changes in properties increase even more when atoms migrate through the lattice and take new positions. In order to gain a deeper insight into many mechanical properties, we therefore need to study the “dynamic case.” It will become obvious during our endeavor that the motion of atoms through solids involves less effort (energy) when open spaces are present in a lattice, as encountered, for example, by empty lattice sites. Thus, we commence with this phenomenon.
KeywordsCreep Rate Edge Dislocation Volume Diffusion Lattice Atom Diffusion Creep
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