Experimental-numerical approach to efficient TTT-generation for simulation of phase transformations in thermomechanical forming processes

authored by: B. A. Behrens, A. Chugreev, C. Kock
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.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Type: Conference contribution
Publication date: 2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Materials Science, General Engineering
Electronic version(s): https://doi.org/10.1088/1757-899X/461/1/012040 (Access: Open)
https://doi.org/10.15488/5345 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{310e801e7b724c21b73a2462065b72f3,
title = "Experimental-numerical approach to efficient TTT-generation for simulation of phase transformations in thermomechanical forming processes",
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.",
author = "Behrens, {B. A.} and A. Chugreev and C. Kock",
note = "Funding information: Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 374871564 within the priority program SPP 2013.; 5th International Conference Recent Trends in Structural Materials, COMAT 2018 ; Conference date: 14-11-2018 Through 16-11-2018",
year = "2018",
doi = "10.1088/1757-899X/461/1/012040",
language = "English",
series = "IOP Conference Series: Materials Science and Engineering",
publisher = "IOP Publishing Ltd.",
booktitle = "Proceedings of 5th International Conference Recent Trends in Structural Materials",
}