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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 5    No. 3    September 1995

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ELECTRON DIFFRACTION PATTERNS ANALYSIS OF PRECIPITATES IN LD10 ALLOY
Jin Tounan; Yin Zhimin

Department of Materials Science and Engineering; Central South University of Technology; Changsha 410083

Abstract:By means of the available crystal parameters of precipitates and the orientation relationships between the precipitates and the matrix in aluminium alloys, the diffraction patterns of all possible precipitates have been simulated, which agrees with experimental observations in LD10 alloy. The method used was to transform the reciprocal lattice vectors gp of the precipitate phases into unit normal vector on the matrix lattice, and to check up whether those gp satisfy the Bragg condition and then to determine the locations of diffraction spots on the matrix diffraction pattern. The method is applicable to any system where the orientation relationships and lattice parameters of matrix and precipitate phase are known.

 

Key words: precipitate; simulated diffraction pattern; transformation matrix

ISSN 1672-7029
CN 43-1423/U

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