Abstract
Presently, the main mechanism for phase transformations in machining of steels is not absolutely clear and is still subject to research. This paper presents, three different approaches for modeling phase transformations during heating in machining operations. However, the main focus lies on two methods which can be classified into a stress related method and a thermal activation related method for the description of austenitization temperature. Both approaches separately showed very good agreements in the simulations compared to the experimental validation but were never compared in a simulation. The third method is a pre-calculated phase landscape assigning the transformation results based on a micro-mechanically motivated constitutive model to the workpiece in dependence on the temperature and strain history. The paper describes all three models in detail, and the results are also presented and discussed.
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Acknowledgments
The authors gratefully acknowledge the support of the Deutsche Forschungsgemeinschaft in the DFG Priority Program CuTSim—“Modeling, Simulation and Compensation of Thermal Effects for Complex Machining Processes” (SPP 1480).
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Schulze, V., Uhlmann, E., Mahnken, R. et al. Evaluation of different approaches for modeling phase transformations in machining simulation. Prod. Eng. Res. Devel. 9, 437–449 (2015). https://doi.org/10.1007/s11740-015-0618-7
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DOI: https://doi.org/10.1007/s11740-015-0618-7