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The effect of dynamic recrystallization on the growth velocity of new phase crystals at polymorphic transformation of tin and thallium
Author(s) -
Brick V. B.,
Larikov L. N.
Publication year - 1980
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19800151110
Subject(s) - recrystallization (geology) , thallium , tin , materials science , dynamic recrystallization , crystal growth , superposition principle , crystallography , supercooling , growth velocity , phase transition , thermodynamics , metallurgy , chemistry , hot working , physics , microstructure , geology , quantum mechanics , medicine , endocrinology , paleontology
The analysis of dynamic recrystallization influencing the crystal growth of the new phase in high purity tin and thallium (99.9995%) is carried out. It is shown that in tin, in which the β → α transition proceeds on the dislocation or the normal mechanisms (depending upon a supercooling degree, Δ T ) a superposition of dynamic recrystallization results in an increase of the growth velocity of α‐Sn crystals. The most distinct of acceleration is observed at −21 ÷ − 23 °C, when the growth velocity of recrystallization centers and the maximal growth velocity, V max , of the crystals are comparable values. The dynamic recrystallization superposition in thallium offers to transform the transformation mechanism. Thereby an erase of the features of the martensite α ⇄ β transition mechanism and an appearance of the features of the normal crystal growth mechanism of the new phase are observed.