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Nucleation of dislocation loops by cracks in crystals

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Abstract

It is shown by observations of etch-pits that dislocation loops are nucleated ahead of slowly moving cleavage cracks in LiF crystals. The loops are nucleated in dislocation-free regions of crystals. Loops larger than ~ 5 μ diam are stable at room temperature, but collapse at 400°C. The loops expand and contract under applied stresses.

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Authors and Affiliations

  1. Research Laboratory, General Electric Co., Schenectady, USA

    J. J. Gilman (Junior Member AIME)

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  1. J. J. Gilman
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Additional information

TP 4425E. Manuscript, Aug. 24, 1956. New Orleans Meeting, February 1957.

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Gilman, J.J. Nucleation of dislocation loops by cracks in crystals. JOM 9, 449–454 (1957). https://doi.org/10.1007/BF03397898

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  • DOI: https://doi.org/10.1007/BF03397898

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