TY - GEN

T1 - Numerical modeling of the development of intermetallic layers between aluminium and steel during co-extrusion

AU - Behrens, Bernd-Arno

AU - Klose, Christian

AU - Thürer, Susanne Elisabeth

AU - Heimes, Norman

AU - Uhe, Johanna

N1 - 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.

PY - 2019/7/2

Y1 - 2019/7/2

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85068870885&partnerID=8YFLogxK

U2 - 10.1063/1.5112563

DO - 10.1063/1.5112563

M3 - Conference contribution

AN - SCOPUS:85068870885

T3 - AIP Conference Proceedings

BT - Proceedings of the 22nd International ESAFORM Conference on Material Forming

A2 - Arrazola, Pedro

A2 - Saenz de Argandona, Eneko

A2 - Otegi, Nagore

A2 - Mendiguren, Joseba

A2 - Saez de Buruaga, Mikel

A2 - Madariaga, Aitor

A2 - Galdos, Lander

T2 - 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019

Y2 - 8 May 2019 through 10 May 2019

ER -