Abstract
Use was made of a recently developed surface-accumulation diffusion technique to measure the self-diffusivity of edge-type dislocation singular lines (Burgers vector along <110>) in a bent and polygonized single crystal of silver. Two factors are involved in obtaining a number for the diffusivity. One factor, the dislocation-line density, was measured by a microscopic technique recently developed, and the value of the other parameter, the effective “diameter” of a dislocation pipe, was estimated. With these parameters equal to 7.3×106 dislocations per sq cm and 10−7 cm, respectively, it was found that the self-diffusivity along edge-type dislocation lines was a factor of about two times the average grain-boundary self-diffusivity. The dislocation-pipe diffusivity is about 7×10−7 sq cm per sec at 450°C.
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Discussion on this paper, TP 3830E, may be sent, 2 copies, to AIME by Jan. 1, 1955. Manuscript, Apr. 15, 1954. Chicago Meeting, November 1954.
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Hendrickson, A.A., Machlin, E.S. Self-Diffusivity Along Edge-Dislocation Singular Lines in Silver. JOM 6, 1035–1037 (1954). https://doi.org/10.1007/BF03398342
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DOI: https://doi.org/10.1007/BF03398342