University of Oulu

Paananen, J. & Pohjonen, A. & Larkiola, J. & Anttila, S. A coupled temperature-microstructure model for the heat-affected zone of low alloyed high strength steel during two-pass arc welding. In Sommitsch, C., Enzinger, N., Mayr, P. (eds.), The 12th International Seminar "Numerical Analysis of Weldability", pp. 233-251.

A coupled temperature-microstructure model for the heat-affected zone of low alloyed high strength steel during two-pass arc welding

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Author: Paananen, J.1; Pohjonen, A.1; Larkiola, J.1;
Organizations: 1University of Oulu, Materials and Production Technology, Pentti Kaiteran katu 1, 90014 Oulu, Finland
2SSAB Europe, P.O. Box 93, 92101 Raahe
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 1.3 MB)
Persistent link:
Language: English
Published: Verlag der Technischen Universität Graz, 2019
Publish Date: 2019-10-16


A coupled temperature-microstructure model was developed in order to simulate the evolution of the microstructure in the heat-affected zone during two-pass gas-metal arc welding. The model is developed to serve the steel industry’s need to evaluate the weldability of new steel grades. Heat transfer and heat input models were used for modelling the arc welding and the temperature changes in the heat-affected zone. A microstructure model was fully coupled with the temperature model, including latent heat of transformation as well as the dependence of thermophysical properties on temperature and phase fractions. The microstructure model simulates phase transformations and grain growth including a simplified model for the effect of fine particles. The modeled temperature paths are in good agreement with the measured ones. The final phase fractions and grain size distribution obtained from the model correspond to the actual microstructure and the model predicts the shapes of the heat-affected zone and fusion zone with relatively good accuracy.

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Series: Mathematical modelling of weld phenomena
ISSN: 2410-0544
ISSN-L: 2410-0544
ISBN: 978-3-85125-616-1
ISBN Print: 978-3-85125-615-4
Pages: 233 - 251
DOI: 10.3217/978-3-85125-615-4-15
Host publication: Mathematical modelling of weld phenomena 12
Host publication editor: Sommitsch, Christof
Enzinger, Norbert
Mayr, Peter
Conference: International Seminar "Numerical Analysis of Weldability"
Type of Publication: A4 Article in conference proceedings
Field of Science: 216 Materials engineering
Funding: The authors are grateful to Mr. Juha Uusitalo for the Gleeble experiments and to Mr. Tun Tun Nyo for the valuable help in sample preparation. Also, the authors are grateful for the support of the SSAB Europe Oy.
Copyright information: © 2019 Graz University of Technology