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ON THE ORIENTATION RELATIONSHIP BETWEEN TRANSFORMATION PRODUCT AND PARENT PHASE |
Wang Guijin (Central Iron and Steel Research Institute;Ministry of Metallurgical Industry)Kang Zhenchuan (Beijing Institute of Metallurgy Research) and Zhao Buolin (Beijing Institute of Iron and Steel Technology) |
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Cite this article:
Wang Guijin (Central Iron and Steel Research Institute;Ministry of Metallurgical Industry)Kang Zhenchuan (Beijing Institute of Metallurgy Research) and Zhao Buolin (Beijing Institute of Iron and Steel Technology). ON THE ORIENTATION RELATIONSHIP BETWEEN TRANSFORMATION PRODUCT AND PARENT PHASE. Acta Metall Sin, 1981, 17(2): 185-195.
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Abstract The cell volume V~((0)) of fcc/bcc and fee/bet has been calculated for three orientation relationships. The orientation will be acceptable if its V~((0)) is larger than others, and everyone has its own range of lattice parameter ratio. Then the lower energy 0 lattice will appear when γ gets some particular value. It is suggested that the γ value can be changed locally by segregating or depleting solute atoms near boundary so that the density of dislocation on boundary can be decreased. The Zn segregation in α/β brass would be explained with this mode.It is shown that the magnitude and direction of tetragonal distortion affect the V~((0)) considerably. It will be expected to predict the reasonable distortion direction if the orientation and the lattice parameter are given. But the fact that the orientation relationship between austenite and martensite in Fe-C alloy changes from K-S to N-W can be explained satisfyingly if it is suggested that carbon atoms move to transformation interface along <11(?)>_f direction.
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Received: 18 February 1981
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[1] Saisan, (西山), Sci. Rep. Res., Inst. Tohoku Univ., Ser. 1, 23(1924) , 638. [2] #12 [3] Bain, E. C., Trans. AIME, 70 (1924) , 25. [4] Bollmann, W., Crystal Defects and Crystalline Interface, Springer Verlag, Berlin 1970. p. 188 [5] 高杉隆幸、和泉修,日本金属学会誌,42(1978) ,1089. [6] Bollmann, W., Phys. Status Solidi, (a) 21 (1974) , 543. [7] Chadwick, C. A., Metallography of Phase Transformation, Butterworths, London, 1972. [8] Hume-Ruthely, W. and Roynor, G. V., The Structure of Metal and Alloy, 4th ed., The Institute of Metals, London, 1962. [9] Kurdjumov, G. V., Supplement to Trans. Jap. Inst. Metals, Publ by JIM, 1976, p. 9. [10] Thomas, J., Sci. Instru., 25 (1948) , 440. [11] Newkirk, J. B., J. Metals, 9 (1957) , 348. [12] 康振川、王桂金、赵伯麟,Fe-C合金的γ/α界面的研究(待发表)。 [13] Christian, J. W., The Theory of Transformation in Metals and Alloys, Pergamon, Oxford, 1965. [14] #12 |
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