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    Direct Observations on Structure of Ultramicrotomed Metals and Alloys

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    Slices 100 to 600 Å thick were cut in an ultramicrotome from a variety of nonferrous metals and alloys and examined in an electron microscope. Microtoming appears to introduce high densities of dislocations which anneal out rapidly in the case of low-melting-point materials. High densities of “fault bands” are observed in certain grains of copper and silver. Particles as small as 7 to 20 Å thick by 70 Å or more long may readily be detected, together with the coherency strains round them. Fine holes may also be examined.

    Author Information:

    Phillips, V. A.
    General Electric Research Laboratory, Schenectady, N. Y.

    Committee/Subcommittee: E04.08

    DOI: 10.1520/STP43676S