Experimental-numerical approach to efficient TTT-generation for simulation of phase transformations in thermomechanical forming processes
Open Access
- 10 December 2018
- journal article
- research article
- Published by IOP Publishing in IOP Conference Series: Materials Science and Engineering
- Vol. 461 (1), 012040
- https://doi.org/10.1088/1757-899x/461/1/012040
Abstract
Residual stresses in components are an important issue in most manufacturing processes, as they influence the performance of the final part. Regarding hot forming processes there is a great potential of defining a targeted residual stress state, due to numerous adjustment parameters like deformation state or temperature profile. In order to ensure appropriate numerical modelling of resulting residual stresses in a thermomechanical process, comprehensive material data regarding phase transformation are required. This paper presents an experimental-numerical procedure to efficiently determine time-temperature-transformation diagrams for cooling simulations after hot forming. The transformation behaviour of the steel alloys 42CrMo4 and 100Cr6 is determined by experiments as well as FE-simulations. Finally, the simulation model is validated by dilatometric experiments and metallographic investigations.This publication has 7 references indexed in Scilit:
- Numerical and experimental investigations of the anisotropic transformation strains during martensitic transformation in a low alloy Cr-Mo steel 42CrMo4Procedia Engineering, 2017
- Handbuch UmformtechnikPublished by Springer Science and Business Media LLC ,2016
- Microstructure Transformations in Tempering Steels during Continuous Cooling from Hot Forging TemperaturesSteel Research International, 2010
- Consideration of Phase Transformations in Numerical Simulation of Press HardeningSteel Research International, 2007
- Relationship between non-isothermal transformation curves and isothermal and non-isothermal kineticsActa Materialia, 2005
- A computational model for the prediction of steel hardenabilityMetallurgical and Materials Transactions B, 1998
- Calculation of the isothermal transformation into two different microstructures from measurements with continuous coolingSteel Research, 1990