The Crystallographic Aspect of the Mechanical Twinning in Metals

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概要

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• In order to investigate twinning dislocations of metals, a simple crystallographical calculation is done, assuming that atomic movements are periodic as the twinning plane moves, that there is no diffusion, and that atoms come to new twin lattice sites from the most neighbouring original lattice sites of them. The shear strain S, Burgers vector b_i and its associated atomic movements U, and the structure of twin boundary are obtained for any crystallographic plane. It is shown that U may be easily demonstrated by using a "modified lattice" in which b_t diminishes to zero. Compared with various twinning planes, the observed twinning planes have the following characteristic: their S is the smallest, but their lb_tl and |U| are not. And when their S is equal to others, the twinning planes which have smaller |b_tl are liable to twin. There are several twinning planes, which are possible to twin, e.g. {431} of β-Sn, and {100}, {531}, {221} of Bi type. In {1011} of Mg, S=0.353, and K_z, plane is such a one as (1320) which is somewhat rotated around the axis normal to (1011).

• 社団法人日本物理学会の論文
• 1954-10-25

著者

• Kiho Hiroshi

  Department Of Physics College Of Liberal Arts And Science Kyoto University

• Kiho Hiroshi

  Department Of Physics Yoshida College

関連論文

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• The Crystallographic Aspect of the Mechanical Twinning in Metals
• The Crystallographic Aspect of the Mechanical Twinning in Ti and α-U
• Intersections of {301}, {101} Twin Bands in Tin
• Incorporation of Slip Dislocations in Mechanical Twins of Tin Crystals
• Plastic Deformation in Crystal Region of Nylon 66
• The Consecutive Observations on the Twin Intersections

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