Abstract
An investigation was made of the effects of stress and temperature on delayed yielding arising from substitutional atom locking of dislocations in a face-centered-cubic alloy. Strain aged specimens of an aluminum alloy containing 2 pet Mg, which showed a pronounced yield point at 78°K, were tested in creep at 78°K and 114°K at a series of constant stresses below the tensile upper yield stress. The reciprocal of the delay time for the formation of the first Lueder’s band and the rate of propagation of the band front were found to be identical functions of stress and temperature. The delay time for yielding was found to depend upon the product of separate stress and temperature functions, in disagreement with the theoretical models of Cottrell and Bilby and Fisher for the case of interstitially locked dislocations.
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TP 4323E. Manuscript, Feb. 27, 1956. Cleveland Meeting, October 1956.
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Shepard, L.A., Dorn, J.E. Delayed Yielding in a Substitutional Solid Solution Alloy. JOM 8, 1229–1235 (1956). https://doi.org/10.1007/BF03377856
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DOI: https://doi.org/10.1007/BF03377856