Crystallographic variant selection of martensite at high stress/strain

Das, Arpan (2015) Crystallographic variant selection of martensite at high stress/strain. Philosophical Magazine, 95(20) (IF-1.427). pp. 2210-2227.

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The phenomenological theory of martensitic transformation is well understood that the displacive phase transformations are mainly influenced by the externally applied stress. Martensitic transformation occurs with 24 possible Kurdjomov-Sachs (K-S) variants, where each variant shows a distinct lattice orientation. The elegant transformation texture model of Kundu and Bhadeshia for crystallographic variant selection of martensite in metastable austenite at various stress/strain levels has been assessed in this present research. The corresponding interaction energies have also been evaluated. Encouraging correlation between model prediction and experimental data generation for martensite pole figures at many deformed austenite grains has been observed at different stress/strain levels. It has been investigated that the mechanical driving force alone is able to explain the observed martensite microtextures at all stress/strain levels under uniaxial tensile deformation of metastable austenite under low temperature at a slow strain rate. The present investigation also proves that the Patel and Cohen's classical theory can be utilized to predict the crystallographic variant selection, if it is correctly used along with the phenomenological theory of martensite crystallography.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:stress-induced martensite; variant selection; tensile deformation; austenitic stainless steels; strain-induced martensite; interaction energy
Divisions:Material Science and Technology
ID Code:7286
Deposited By:Dr. A K Sahu
Deposited On:11 Aug 2015 13:07
Last Modified:11 Dec 2015 11:46
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