Reconstruction of deformed parent grains from microstructure inherited by phase transformations

Abstract : The methods used to reconstruct austenite grains from martensite measured by Electron Backscattered Diffraction rely on two assumptions: the orientation relationship and the parent orientation are unique locally. However in presence of an orientation gradient, the second assumption is no longer respected. Therefore in this work, we have first evaluated the deviation to both assumptions which revealed that the presence of an orientation gradient increases the deviation to the second assumption so that it becomes difficult to guaranty a reliable reconstruction. Therefore an adaptation of the method is proposed to better account for the orientation gradient and improve reconstruction results.
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Submitted on : Monday, December 2, 2019 - 10:54:13 PM
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Lionel Germain, Nathalie Gey, Michel Humbert. Reconstruction of deformed parent grains from microstructure inherited by phase transformations. Scripta Materialia, Elsevier, 2019, 158, pp.91-94. ⟨10.1016/j.scriptamat.2018.08.042⟩. ⟨hal-02380651⟩

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