Numerical Investigations on the Lateral Angular Co-Extrusion of Aluminium and Steel

authored by: B. A. Behrens, C. Klose, A. Chugreev, S. E. Thürer, J. Uhe
Abstract: In order to save weight and costs, different materials can be combined within one component. In the novel process chain being developed within the Collaborative Research Centre (CRC) 1153, joined semi-finished workpieces are used to produce hybrid solid components with locally adapted properties. Different materials are joined in an initial step before the forming process takes place. Hereby, the quality of the joining zone is improved by means of the thermo-mechanical treatment during the forming and machining processes. The lateral angular co-extrusion (LACE) approach is used to produce semi-finished workpieces because it allows for the production of coaxial semi-finished products consisting of aluminium and steel. In the further process chain, these semi-finished products are processed into hybrid bearing bushings with locally adapted properties by die forging. In the scope of this work, numerical investigations of the co-extrusion of aluminium-steel compounds were carried out using finite element (FE) simulation in order to examine the influence of the process parameters on the co-extrusion process. For this purpose, the relevant material properties of the aluminium alloy EN AW-6082 were determined experimentally and subsequently implemented in the numerical model. The obtained numerical model was used to study the impact of different ram speeds, press ratios and billet temperatures on the resulting extrusion forces and the material flow. The numerical results have been validated using force-time curves obtained from experimental extrusion tests carried out on a 2.5 MN laboratory extrusion press.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Institute of Materials Science
Type: Conference contribution
Publication date: 03.05.2018
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.1063/1.5034844 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{46f9caf7d772452ca5dc898fe611fdc9,
title = "Numerical Investigations on the Lateral Angular Co-Extrusion of Aluminium and Steel",
abstract = "In order to save weight and costs, different materials can be combined within one component. In the novel process chain being developed within the Collaborative Research Centre (CRC) 1153, joined semi-finished workpieces are used to produce hybrid solid components with locally adapted properties. Different materials are joined in an initial step before the forming process takes place. Hereby, the quality of the joining zone is improved by means of the thermo-mechanical treatment during the forming and machining processes. The lateral angular co-extrusion (LACE) approach is used to produce semi-finished workpieces because it allows for the production of coaxial semi-finished products consisting of aluminium and steel. In the further process chain, these semi-finished products are processed into hybrid bearing bushings with locally adapted properties by die forging. In the scope of this work, numerical investigations of the co-extrusion of aluminium-steel compounds were carried out using finite element (FE) simulation in order to examine the influence of the process parameters on the co-extrusion process. For this purpose, the relevant material properties of the aluminium alloy EN AW-6082 were determined experimentally and subsequently implemented in the numerical model. The obtained numerical model was used to study the impact of different ram speeds, press ratios and billet temperatures on the resulting extrusion forces and the material flow. The numerical results have been validated using force-time curves obtained from experimental extrusion tests carried out on a 2.5 MN laboratory extrusion press.",
author = "Behrens, {B. A.} and C. Klose and A. Chugreev and Th{\"u}rer, {S. E.} and J. Uhe",
note = "Funding information: The results presented in this paper were obtained within the Collaborative Research Centre 1153 “Process chain to produce hybrid high performance components by Tailored Forming” in the subproject A1. The authors would like to thank the German Research Foundation (DFG) for the financial support of this project. The flow curves presented in this paper were obtained in cooperation with subproject C1 of the CRC 1153.; 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 ; Conference date: 23-04-2018 Through 25-04-2018",
year = "2018",
month = may,
day = "3",
doi = "10.1063/1.5034844",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Gianluca Buffa and Livan Fratini and Giuseppe Ingarao and {Di Lorenzo}, Rosa",
booktitle = "Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018",
address = "United States",
}