Phase-field simulation of peritectic steels solidification with transformation-induced elastic effect

Journal of Materials Research and Technology, vol. 9, pp. 3805–3816

Abstract

Peritectic carbon steels are more prone to surface cracking during continuous casting than other carbon steels. The main problems are the formation of longitudinal depressions and of transversal near-corner cracks. It is normally assumed that these problems are related to the δ->γ phase transformation and its associated volume contraction of 0.5%. In this work, we utilize phase-field simulations in the Fe–C and Fe–Mn to access the stress and strain fields which develop just as a consequence of the δ->γ phase transformation. We show that the deformation tends to concentrate in the vicinity of δ-γ-liquid triple junction and that the developed stresses are high enough to produce local plastic deformation of the phases. It is also demonstrated that the undercooling value set for the simulations affects the stress level in an important way.

Authors 4

1. Celso Luiz Moraes Alves corresponding

   Universidade Federal Fluminense

   Affiliation as printed

   Escola de Engenharia Industrial Metalúrgica de Volta Redonda (EEIMVR-UFF), Universidade Federal Fluminense, Av. dos Trabalhadores, 420 - Vila Santa Cecília, 27255-125, Volta Redonda, RJ, Brazil

2. Joao Luiz Lopes Rezende

   GTT-Technologies (Germany)

   Affiliation as printed

   GTT-Technologies, Kaiserstraße 103, 52134 Herzogenrath, Germany

3. Dieter Senk Aachen Department of Ferrous Metallurgy

   RWTH Aachen University

   Affiliation as printed

   Department of Ferrous Metallurgy (IEHK), RWTH Aachen University, Intzestrasse 1, 52072, Germany

4. Julia Kundin

   Ruhr University Bochum

   Affiliation as printed

   Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) - Ruhr-Universität Bochum, IC 02-703, Universitaetsstrasse 150, 44801, Germany