Hello Gevorg Ter-Isahakyan ,

The mechanism for forming martensite tiles in steel is by cooling the austenite. Martensite is obtained by austenitic cooling (quenching) which closes the carbon atoms that fail to diffuse out of the crystal structure. This martensitic reaction begins during cooling when the austenite reaches the martensite initial transformation temperature and the austenitic becomes mechanically unstable. At a constant transformation temperature, a portion of the austenitic is sharply transformed and then does not follow other transformations. When the temperature drops, the austenitic becomes martensite. Eventually the martensite end temperature is reached and the transformation is completed.

Martensite does not have a good balance in the phases of the iron-carbon system because it is metastable. Because chemical processes accelerate when temperature rises, martensite is easily destroyed by heat.

Regards Emil Yankov

@. M. Akhtar: I would not say "the true answer". True is that this is the possibly current belief, i.e., an indication which seems to explain the experimental observation, but not more. Models about the understanding of nature are practically always temporary, sometimes it also turns out that they were totally wrong. In so far, there is no "true" answer on this question, only a very likely correlation between a model and an experimental fact.

Hello Gevorg Ter-Isahakyan ,

I agree that materialistic transformation can also be realized through plastic deformation as it offers and Modassir Akhtar. Such collective research can be found in my profile.

Article Changes in the mechanical properties and microstructure of a...

Article Changes in the mechanical properties and microstructure of a...

Research Тhesis: SHEET MATERIALS TESTING USING BIAXIAL HYDRAULIC BULGE TEST

I agree with the view of Gert Nolze zhsichko a matter of knowledge, skill and experience.

With respect

Emil Yankov