Numerical modeling of the development of intermetallic layers between aluminium and steel during co-extrusion

authored by: Bernd-Arno Behrens, Christian Klose, Susanne Elisabeth Thürer, Norman Heimes, Johanna Uhe
Abstract: Undergoing the Tailored Forming process chain, coaxial aluminium-steel profiles joined by co-extrusion are formed into hybrid bearing bushings by die forging. During the joining of aluminium and steel, intermetallic phases may develop. As these phases are very hard and brittle, it is important to be able to predict the width of the resulting intermetallic layer because it is likely to reduce the strength of the compound for the subsequent forging step. In the scope of this paper, a possibility for numerical calculation of the resulting phase thickness during the co-extrusion of aluminium and steel, by means of Lateral Angular Co-Extrusion (LACE), is presented. In the first step, an analogy test on a forming dilatometer was developed for the experimental investigation of the intermetallic phase formation. The width of the intermetallic phase seam was determined by means of scanning electron microscopy using an image processing tool. Based on the experimental results, a calculation instruction was defined to describe the intermetallic phase thickness as a function of temperature and contact time. The function was implemented in a commercial finite element (FE) software by means of a user-defined subroutine and validated on the basis of experimental data.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Institute of Materials Science
Type: Conference contribution
No. of pages: 7
Publication date: 02.07.2019
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Ecology, Evolution, Behavior and Systematics, Ecology, Plant Science, General Physics and Astronomy, Nature and Landscape Conservation
Electronic version(s): https://doi.org/10.1063/1.5112563 (Access: Closed)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{c56f545d037f4f68ad1114c63f8e2ca8,
title = "Numerical modeling of the development of intermetallic layers between aluminium and steel during co-extrusion",
abstract = "Undergoing the Tailored Forming process chain, coaxial aluminium-steel profiles joined by co-extrusion are formed into hybrid bearing bushings by die forging. During the joining of aluminium and steel, intermetallic phases may develop. As these phases are very hard and brittle, it is important to be able to predict the width of the resulting intermetallic layer because it is likely to reduce the strength of the compound for the subsequent forging step. In the scope of this paper, a possibility for numerical calculation of the resulting phase thickness during the co-extrusion of aluminium and steel, by means of Lateral Angular Co-Extrusion (LACE), is presented. In the first step, an analogy test on a forming dilatometer was developed for the experimental investigation of the intermetallic phase formation. The width of the intermetallic phase seam was determined by means of scanning electron microscopy using an image processing tool. Based on the experimental results, a calculation instruction was defined to describe the intermetallic phase thickness as a function of temperature and contact time. The function was implemented in a commercial finite element (FE) software by means of a user-defined subroutine and validated on the basis of experimental data.",
author = "Bernd-Arno Behrens and Christian Klose and Th{\"u}rer, {Susanne Elisabeth} and Norman Heimes and Johanna 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, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - 252662854. The authors would like to thank the German Research Foundation for the financial support of this project.; 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019 ; Conference date: 08-05-2019 Through 10-05-2019",
year = "2019",
month = jul,
day = "2",
doi = "10.1063/1.5112563",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
number = "1",
editor = "Pedro Arrazola and {Saenz de Argandona}, Eneko and Nagore Otegi and Joseba Mendiguren and {Saez de Buruaga}, Mikel and Aitor Madariaga and Lander Galdos",
booktitle = "Proceedings of the 22nd International ESAFORM Conference on Material Forming",
}