By Jean-Paul Poirier
This textbook describes the physics of the plastic deformation of solids at excessive temperatures. it's directed at geologists or geophysicists attracted to the high-temperature behaviour of crystals who desire to develop into conversant in the equipment of fabrics technological know-how in as far as they're worthwhile to earth scientists. It explains an important types and up to date experimental effects with no wasting the reader within the basic literature of fabrics technological know-how. In flip the e-book bargains with the basic solid-state physics; thermodynamics and hydrostatics of creep; creep versions and their functions within the geological sciences; diffusion creep; superplastic deformation and deformation stronger by way of section ameliorations. 5 concluding chapters supply experimental effects for metals, ceramics and minerals. There are broad bibliographies to help extra learn.
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Additional info for Creep of Crystals: High-Temperature Deformation Processes in Metals, Ceramics and Minerals (Cambridge Earth Science Series)
Sample text
28 Mechanical background The law in r 1/3 , known as Andrade's law, gives a very good fit to the primary regime of practically all materials: steel, concrete, nylon, graphite, etc. (see Kennedy, 1962). It is clearly useless to try to interpret it in terms of a particular physical process. The quasi-steady-state regime is usually treated as a steady-state regime and its creep-rate variation with stress and temperature is often taken as the equation of state of creep. Some caution, however, is in order: first, the fact that a portion of the creep curve appears linear or not over a certain time interval often depends on the time scale of the creep curve.
31). In the log cr-log e plot, constant-structure curves corresponding to given values of y can be drawn (fig. 16). The parameter y can be operationally defined in several ways all corresponding to the same state of hardening of the crystal. e. with negligible strain), the stress is suddenly increased to a l (or decreased to D. Means, Stress and strain, Springer-Verlag, New York (1976), 339 pp. A crystal-clear introduction to basic concepts of continuum mechanics for geologists. M. Reiner, Deformation, strain and flow, H. K. Lewis, London (1969), 347 pp. An illuminating introduction to rheology by one of its founding fathers. A. H. Cottrell, The mechanical properties of matter, Wiley, New York (1964), 430 pp. From physics to mechanics of materials at the undergraduate level. A gem of a book. The agents of deformation: lattice defects Plastic deformation of crystals is carried by lattice defects: the migration of vacancies is responsible for deformation by transport of matter, the propagation of dislocations is responsible for deformation by slip, in polycrystals grain-boundary motion may also be a source of deformation.