Abstract
Cubic specimens of fine-grained artifical polycristalline rock salt were deformed at different principal stresses in the range of 20–200° C. The data from different types of tests are compared by plotting σ1–σ3 against ɛ1, ɛ2, ɛ3. The deformation behavior is highly influenced by the intermediate principal stress σ2. An increase of the intermediate stress from compression (σ1>σ2=σ3) to extension (σ1=σ2>σ3) lowers the rate of deformation. An increase of temperature always gives rise to an increase of deformation rate.
Translation gliding on (110) is assumed to be the dominant flow mechanism. Textural changes and development of preferred orientation were investigated by means of the X-ray diffractometer. Intensities were measured for (110), (111), and (100). Compression leads to girdle occupations about the unique principle compressive axis, extension to girdles about the unique principle axis of extension. When all principle stresses are different the polfigures tend to a position intermediate between the two occupations.
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Kern, H., Braun, G. Deformation und Gefügeregelung von Steinsalz im Temperaturbereich 20–200° c. Contr. Mineral. and Petrol. 40, 169–181 (1973). https://doi.org/10.1007/BF00378174
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DOI: https://doi.org/10.1007/BF00378174