Key role of transformation twins in comparison of results of crystal geometric and dynamic analysis for thin-plate martensite

• Published in: Physics of metals and metallography Vol. 114; no. 10; pp. 821 - 825
• Main Authors: Kashchenko, M. P., Chashchina, V. G.
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.10.2013; Springer; Springer Nature B.V
• Subjects: Chemistry and Materials Science; Comparative analysis; Materials Science; Metallic Materials; Theory of Metals; Twinning (Crystallography); Twins; martensitic transformation; thin plate-like crystals; fraction of twin component; transformation twins; dynamic theory
• ISSN: 0031-918X; 1555-6190
• DOI: 10.1134/S0031918X1308005X

The experimental data on the ratio of transformation twins fractions for crystals of thin-plate α-martensite (with the habit planes of the {2 5 9} γ −{3 10 15} γ type) are considered. It is shown that the dynamic theory of the martensite crystals formation is free from the difficulties encountered in the formal crystal geometric approach. The intervals of parameter values that correspond to the observed fractions of the twin component, δ tw , within the same crystal are given. The absence of twinning in thin plate-like crystals, which sometimes are observed in experiments on the γ-α martensite transformation induced by strong magnetic field is discussed.