TY - JOUR
T1 - The effect of heating rate on the microstructure of a soft-annealed medium carbon steel
AU - Papaefthymiou, Spyros
AU - Goulas, Konstantinos
AU - Castro Cerda, Felipe Manuel
AU - Geerlofs, Nico
AU - Petrov, Roumen
PY - 2017
Y1 - 2017
N2 - A comparative study on the microstructural changes after conventional (20 °C s−1) and ultrafast (300 °C s−1) heating is performed on a medium carbon steel in the soft annealed condition. Continuous-heating dilatometry experiments are carried out. The phase transformations and the volume phase fraction of austenite are determined among other microstructural changes. The microstructure is first observed using Optical Microscopy (OM), further characterized by Scanning (SEM), and detailed analyzed by Transmission Electron Microscopy (TEM). The effect of heating rate on the kinetics of cementite dissolution and austenite formation is rationalized. The experimental results are compared with Dictra calculations, and the possible effects on the kinetics of diffusion-controlled austenite formation are rationalized as well. Metallographic observations indirectly suggest the enhanced nucleation of austenite above Am.
AB - A comparative study on the microstructural changes after conventional (20 °C s−1) and ultrafast (300 °C s−1) heating is performed on a medium carbon steel in the soft annealed condition. Continuous-heating dilatometry experiments are carried out. The phase transformations and the volume phase fraction of austenite are determined among other microstructural changes. The microstructure is first observed using Optical Microscopy (OM), further characterized by Scanning (SEM), and detailed analyzed by Transmission Electron Microscopy (TEM). The effect of heating rate on the kinetics of cementite dissolution and austenite formation is rationalized. The experimental results are compared with Dictra calculations, and the possible effects on the kinetics of diffusion-controlled austenite formation are rationalized as well. Metallographic observations indirectly suggest the enhanced nucleation of austenite above Am.
KW - austenite
KW - cementite
KW - dictra
KW - kinetics
KW - massive
KW - ultrafast heating
UR - http://www.scopus.com/inward/record.url?scp=85026387132&partnerID=8YFLogxK
U2 - 10.1002/srin.201700158
DO - 10.1002/srin.201700158
M3 - Article
AN - SCOPUS:85026387132
SN - 1611-3683
VL - 88
JO - Steel Research International
JF - Steel Research International
IS - 10
M1 - 1700158
ER -