Numerical investigation of temperature and phase development of (deformation-) dilatometer specimens
Lutz S, Weninger J, Helldoerfer B, Merklein M (2014)
Publication Type: Conference contribution
Publication year: 2014
Journal
Publisher: Trans Tech Publications Ltd
Book Volume: 611-612
Pages Range: 1539-1544
Conference Proceedings Title: Material Forming - ESAFORM 2014
ISBN: 9783038351061
DOI: 10.4028/www.scientific.net/KEM.611-612.1539
Abstract
The Gleeble 3500 thermo-mechanical testing machine with ISO-Q dilatometer set-up allows the creation of time temperature transformation diagrams at high cooling rates, after deformation and under constant load with a simple experimental set-up. An isothermal plane with temperature gradients perpendicular to this plane arises in the sample which is used for dilatometrical evaluation. The homogeneity and size of this isothermal region has a decisive influence on the measurement results, but cannot be measured with sufficient accuracy. To gain an accurate understanding of the processes in the sample, a coupled thermo-electrical, thermo-metallurgical, thermo-mechanical finite element model of the experiments is set up. To map the temperature control circuit of the machine, a PID controller is implemented, which controls the voltage of the conductive sample heating between the simulation steps. By comparing the temperature and hardness distribution with the experiments, it is shown that in this way the temperature distribution and phase transformation can be mapped. By the findings, the experimental setup was adjusted. This led to an improvement of the measurement results. © 2014 Trans Tech Publications, Switzerland.
Authors with CRIS profile
Stefan Lutz
Institute of Manufacturing Technology
Marion Merklein
Institute of Manufacturing Technology
Additional Organisation(s)
Involved external institutions
Germany (DE)How to cite
APA:
Lutz, S., Weninger, J., Helldoerfer, B., & Merklein, M. (2014). Numerical investigation of temperature and phase development of (deformation-) dilatometer specimens. In Larkiola, J. (Eds.), Material Forming - ESAFORM 2014 (pp. 1539-1544). Trans Tech Publications Ltd.
MLA:
Lutz, Stefan, et al. "Numerical investigation of temperature and phase development of (deformation-) dilatometer specimens." Proceedings of the Material Forming - ESAFORM 2014 Ed. Larkiola, J., Trans Tech Publications Ltd, 2014. 1539-1544.
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