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| ON THE ELECTRON DIFFRACTION PATTERNS OF TWINS IN CUBIC SYSTEMS |
| Chen Qian-ti (Research Institute of Wuhan Iron and Steel Co. ) |
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Cite this article:
Chen Qian-ti (Research Institute of Wuhan Iron and Steel Co. ). ON THE ELECTRON DIFFRACTION PATTERNS OF TWINS IN CUBIC SYSTEMS. Acta Metall Sin, 1978, 14(4): 430-439.
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Abstract The electron diffraction patterns of twinning in either face or body center cubic systems possess four kinds of mode for all zero layer diffraction patterns of twins which coincided with any {uvw}~* zero layer diffraction patterns of the matrix: (1) if any two among indexes u, v and w are zero, only one mode of pattern is possible; (2) if any one index is zero or all three are identical, there are two modes of patterns; (3) if any two indexes are identical, there are three modes of pattern; and (4) only if u≠v≠w≠0, four modes are present.In most cases, zero layer diffraction spots of twin coincided with that of the matrix. Special attention therefore must be paid to the presence of twin diffractions which may often be overlooked.The different types of electron diffraction patterns for twinning in cubic systems are discussed. A rapid method to detect the twin diffraction spots has been proposed.
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Received: 18 April 1978
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[1] Johari O. and Thomas, G., Trans. AIME, 230 (1964) , 597．
[2] Meieran, E, S. and Richman, M. H., Trans. AIME, 227 (1963) , 1044．
[3] 郭可信,私人通讯.
[4] Hirsch, P. B. et al., Electron Microscopy of Thin Crystals, Butterworths, London, 1965． |
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