Almeida Junior, D. R.
Zilnyk, K. D.
Sandim, H. R. Z.
Total Authors: 4
 Univ Sao Paulo, EEL, Lorena Sch Engn, BR-12602810 Lorena, SP - Brazil
 ITA, BR-12228900 Sao Jose Dos Campos, SP - Brazil
 MPI E, D-40237 Dusseldorf - Germany
Total Affiliations: 3
JOURNAL OF NUCLEAR MATERIALS;
APR 1 2019.
Web of Science Citations:
A computer program was employed to reconstruct the parent microstructure from electron backscatter diffraction maps taken from martensite. The reconstruction is based on a given user-selected orientation relationship. Two reduced-activation ferritic-martensitic Eurofer steels were austenitized for several times and cooled down at different rates. Two parameters are proposed to assess the quality of the reconstruction: the relative frequency of orientations in a determined sub-portion of the Euler space and the distribution of the angular deviation from a given theoretical orientation relationship. The number of active martensitic orientation variants during the transformation depends on grain size. Coarser grains enable a greater number of active variants improving the reconstruction quality. The distributions of angular deviations reveal that the Greninger-Troiano orientation relationship is the one that best describes the martensitic transformation in both steel grades. (C) 2019 Elsevier B.V. All rights reserved. (AU)