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Structural Phase Transformation (F.C.C. → B.C.C.) in Ag, Pt, and Sr and Their Stability on the Path of Transformation
Author(s) -
Seyoum K. Belay,
Thakur K. P.,
Jha D.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221670211
Subject(s) - morse potential , phase (matter) , stress (linguistics) , materials science , crystallography , deformation (meteorology) , transformation (genetics) , energy (signal processing) , stability (learning theory) , thermodynamics , chemistry , physics , atomic physics , composite material , linguistics , philosophy , biochemistry , organic chemistry , quantum mechanics , machine learning , computer science , gene
Theoretical calculations are made to locate the stress‐free b.c.c. phase in three f.c.c. metals (Ag, Pt, and Sr). Internal energies corresponding to the unstressed b.c.c. and f.c.c. phases, and the required stress and energy changes for f.c.c. → b.c.c. transformation in these crystals are presented. To determine the range of stability (G stability) the Born criterion is used by calculating the values of corresponding elastic moduli on the line of deformation connecting the stress‐free b.c.c. and stress‐free f.c.c. phases of the crystal. The Morse potential model is used to carry out these calculations.