Relation between the activation parameters of low-temperature slip and the mean-square amplitude of atomic vibrations in cubic metals |
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Authors: | M Z Butt S A Chaudhary |
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Institution: | (1) Metal Research Laboratories, Department of Physics, Government College, P.O.Box 1072, Lahore-, 54000, Pakistan;(2) Bahrain Training Institute, P.O.Box 37010, Bahrain |
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Abstract: | The available data on various activation parameters of low-temperature slip in 9 body-centred cubic and 5 face-centred cubic elements have been examined as a function of a single microscopic parameter, namely mean-square amplitude of atomic vibrations <u
2>, specific to the material. It is found that for a given crystal structure, the microscopic parameters of the unit activation process of yielding, e.g. the initial length of dislocation segment, the critical height of the kink-pair nucleated, the associated activation volume, the binding energy per interatomic spacing along the glide dislocation on the slip plane etc. correlate well with the mean-square amplitude of atomic vibrations <u
2> through a power regression formula. |
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