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Fine Structure of Slip-Zones


RECENTLY, Heidenreich and Shockley1 have reported that, in single crystals of aluminium, deformed at room temperature, the slip-lines can be resolved by the electron microscope into a cluster of finer lines. These lines are found to be the boundaries of elementary glide lamellæ some 200 A. thick, which have slipped over each other a distance of about 2000 A. It is convenient to distinguish between the clusters usually called 'slip-lines' and the finer lines composing them by calling the former 'slip-zones' and the latter 'elementary slip-lines'. It would be interesting to find if this fine structure is fundamental to the slip process in metals beyond the individual case investigated by Heidenreich and Shockley; in particular, one would like to see if slip-zones in the hexagonal metals can be resolved.

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  1. Heidenreich, R. D., and Shockley, W., J. App. Phys., 18, 1029 (1947).

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  2. Lacombe, P., and Beaujard, L., J. Inst. Metals, 74, 1 (1947).

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  3. Maddin, R., Mathewson, C. H., and Hibbard, W. R., jun., Metals Tech., T.P. 2331 (February 1948).

  4. Chalmers, B., King, R., and Shuttleworth, H., Proc. Roy. Soc., A, 193, 465 (1948).

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BROWN, A. Fine Structure of Slip-Zones. Nature 163, 961–962 (1949).

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