TY - JOUR
T1 - The role of plastic strains on variant selection in ausformed bainitic microstructures studied by finite elements and crystal plasticity simulations
AU - Eres-Castellanos, Adriana
AU - Hidalgo, Javier
AU - Morales-Rivas, Lucia
AU - Caballero, Francisca G.
AU - Garcia-Mateo, Carlos
PY - 2021
Y1 - 2021
N2 - The mechanisms driving variant selection phenomena in ausformed bainitic microstructures are not fully controlled yet. Previous results are not congruent among them, as they cannot be explained by the same rule. In this work, we aimed to understand the mechanisms governing variant selection in a medium carbon-high silicon steel subjected to ausforming treatments. To do so, the microstructural characterization in different regions of barreled samples has been combined with the simulation of the stress and strain state at the macro and micro level, by finite elements simulations and crystal plasticity simulations, respectively. The main conclusion is that the variant selection shown in these microstructures can be explained by understanding the distribution of the plastic strains at the macro and micro level. The selection of crystallographic variants is more pronounced in the regions which have been more deformed. Also, the deformation distributes along deformation microbands, where the most promoted variants seem to grow, in good agreement with previous results in ausformed lath martensite.
AB - The mechanisms driving variant selection phenomena in ausformed bainitic microstructures are not fully controlled yet. Previous results are not congruent among them, as they cannot be explained by the same rule. In this work, we aimed to understand the mechanisms governing variant selection in a medium carbon-high silicon steel subjected to ausforming treatments. To do so, the microstructural characterization in different regions of barreled samples has been combined with the simulation of the stress and strain state at the macro and micro level, by finite elements simulations and crystal plasticity simulations, respectively. The main conclusion is that the variant selection shown in these microstructures can be explained by understanding the distribution of the plastic strains at the macro and micro level. The selection of crystallographic variants is more pronounced in the regions which have been more deformed. Also, the deformation distributes along deformation microbands, where the most promoted variants seem to grow, in good agreement with previous results in ausformed lath martensite.
KW - Anisotropy
KW - Ausforming
KW - Bainite
KW - Texture
KW - Thermomechanical treatment
KW - Variant selection
UR - http://www.scopus.com/inward/record.url?scp=85119355127&partnerID=8YFLogxK
U2 - 10.1016/j.jmrt.2021.05.070
DO - 10.1016/j.jmrt.2021.05.070
M3 - Article
AN - SCOPUS:85119355127
SN - 2238-7854
VL - 13
SP - 1416
EP - 1430
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -