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. 2019 Nov 8;12(22):3687. doi: 10.3390/ma12223687

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© 2019 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Schematic of the grain structure within martensite band that emanate from the underlying (prior) austenite. The martensite variant, to which the austenite transforms, needs to be identified based on the criticality requirement mentioned earlier. The values of $O O_{1} = O O_{2} = 0.06 L_{Y}$ , $O O_{3} = O O_{4} = 0.15 L_{Y}$ and $O C_{1} = O C_{2} = 0.25 L_{Y}$ are used.