TY - JOUR
T1 - A thermal-metallurgical-mechanical model for laser welding Q235 steel
AU - Mi, Gaoyang
AU - Xiong, Lingda
AU - Wang, Chunming
AU - Hu, Xiyuan
AU - Wei, Yanhong
N1 - Publisher Copyright:
© 2016 Elsevier B.V.
PY - 2016/12/1
Y1 - 2016/12/1
N2 - Austenization, austenite-pearlite/ferrite transformation, austenite-bainite transformation, and austenite-martensite transformation for laser welding Q235 steel were modeled. The physical properties of thermal-metallurgical-mechanical (TMM) model were determined using linear interpolation based on the phase fractions and physical properties of each pure phase. The volume change and the plastic strain caused by the phase transformations were considered in the TMM model to represent the influence of phase transformations on the stress field. The temperature, phase fraction, and equivalent stress fields during and after laser welding were predicted using a three-dimensional finite element (FE) code developed by the authors to solve the TMM model. To validate the simulation results, temperature, phase fraction, and stress measurement experiments were carried out to study the influence of the phase transformations on both the temperature and stress fields during welding.
AB - Austenization, austenite-pearlite/ferrite transformation, austenite-bainite transformation, and austenite-martensite transformation for laser welding Q235 steel were modeled. The physical properties of thermal-metallurgical-mechanical (TMM) model were determined using linear interpolation based on the phase fractions and physical properties of each pure phase. The volume change and the plastic strain caused by the phase transformations were considered in the TMM model to represent the influence of phase transformations on the stress field. The temperature, phase fraction, and equivalent stress fields during and after laser welding were predicted using a three-dimensional finite element (FE) code developed by the authors to solve the TMM model. To validate the simulation results, temperature, phase fraction, and stress measurement experiments were carried out to study the influence of the phase transformations on both the temperature and stress fields during welding.
KW - Laser beam welding
KW - Phase fractions prediction
KW - Thermal-metallurgical-mechanical model
KW - Transformation induced plasticity
UR - https://www.scopus.com/pages/publications/84978194354
U2 - 10.1016/j.jmatprotec.2016.07.002
DO - 10.1016/j.jmatprotec.2016.07.002
M3 - Article
AN - SCOPUS:84978194354
SN - 0924-0136
VL - 238
SP - 39
EP - 48
JO - Journal of Materials Processing Technology
JF - Journal of Materials Processing Technology
ER -