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| Naji, M. |
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Narumi, T.
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Publications (5/5 displayed)
- 2023Microstructure evolution induced by solidification and ferrite–austenite massive-like transformation in Fe–C alloys
- 2023Reconstruction of dendritic growth by fast tomography and phase field filteringcitations
- 2023Observation of grain motion during semisolid deformation by using 4D-CT and 3DXRDcitations
- 2023In situ observation of solidification in peritectic steels and evaluation of the strains induced in the solidifying shellcitations
- 2020In situ observation of austenite coarsening induced by massive-like transformation during solidification in Fe–C alloyscitations
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article
Microstructure evolution induced by solidification and ferrite–austenite massive-like transformation in Fe–C alloys
Abstract
<jats:title>Abstract</jats:title><jats:p>The coarsening of austenite grains produced through a massive-like transformation from the ferrite to the austenite phase during/after solidification in Fe–0.45mass%C steel was examined through time-resolved X-ray diffraction measurements using time-resolved computed tomography. The δ phase solidification resulted in a single δ grain in the observation region (0.6 mm in diameter, 0.1 mm in height). The massive-like transformation produced multiple γ grains, and coarsening immediately followed the transformation. The coarsening in the observation region was completed even within 200 s. A correlation of crystallographic orientation between the γ grains was found in the γ grain structure. The massive-like transformation frequently produced fcc (111) twinned grains, and the twinned austenite grains tended to remain during coarsening because the twin interface energy is lower than the grain boundary energy. The massive-like transformation following the solidification contributed to the texture formation in the γ grain structure.</jats:p>