Details
| Original language | English |
|---|---|
| Article number | 717 |
| Journal | Metals |
| Volume | 8 |
| Issue number | 9 |
| Early online date | 13 Sept 2018 |
| Publication status | Published - Sept 2018 |
Abstract
The use of lightweight materials is one possibility to limit the weight of vehicles and to reduce CO2 emissions. However, the mechanical properties and weight-saving potential of mono-materials are limited. Material compounds can overcome this challenge by combining the advantages of different materials in one component. Lateral angular co-extrusion (LACE) allows the production of coaxial semi-finished products consisting of aluminum and steel. In this study, a finite element model of the LACE process was built up and validated by experimental investigations. A high degree of agreement between the calculated and experimentally determined forces, temperatures, and the geometrical shape of the hybrid profiles was achieved. In order to determine suitable parameters for further extrusion experiments, the influence of different process parameters on material flow and extrusion force was investigated in a numerical parametric study. Both the temperature and extrusion ratio showed a significant influence on the occurring maximum extrusion force as well as the material flow inside the LACE tool. The maximum force of 2.5 MN of the employed extrusion press was not exceeded. An uneven material flow was observed in the welding chamber, leading to an asymmetric position of the steel rod in the aluminum matrix.
Keywords
- Aluminum-steel compound, Co-extrusion, FEM, Tailored forming
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
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In: Metals, Vol. 8, No. 9, 717, 09.2018.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A Numerical Study on Co-Extrusion to Produce Coaxial Aluminum-Steel Compounds with Longitudinal Weld Seams
AU - Behrens, Bernd Arno
AU - Klose, Christian
AU - Chugreev, Alexander
AU - Heimes, Norman
AU - Thürer, Susanne Elisabeth
AU - Uhe, Johanna
N1 - Funding information: This research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) grant number 252662854. The APC was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation). 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 A01, funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—252662854. The flow curves presented in this paper were obtained in cooperation with subproject C1 of the Collaborative Research Centre 1153. The authors thank the German Research Foundation (DFG) for their financial support of this project.
PY - 2018/9
Y1 - 2018/9
N2 - The use of lightweight materials is one possibility to limit the weight of vehicles and to reduce CO2 emissions. However, the mechanical properties and weight-saving potential of mono-materials are limited. Material compounds can overcome this challenge by combining the advantages of different materials in one component. Lateral angular co-extrusion (LACE) allows the production of coaxial semi-finished products consisting of aluminum and steel. In this study, a finite element model of the LACE process was built up and validated by experimental investigations. A high degree of agreement between the calculated and experimentally determined forces, temperatures, and the geometrical shape of the hybrid profiles was achieved. In order to determine suitable parameters for further extrusion experiments, the influence of different process parameters on material flow and extrusion force was investigated in a numerical parametric study. Both the temperature and extrusion ratio showed a significant influence on the occurring maximum extrusion force as well as the material flow inside the LACE tool. The maximum force of 2.5 MN of the employed extrusion press was not exceeded. An uneven material flow was observed in the welding chamber, leading to an asymmetric position of the steel rod in the aluminum matrix.
AB - The use of lightweight materials is one possibility to limit the weight of vehicles and to reduce CO2 emissions. However, the mechanical properties and weight-saving potential of mono-materials are limited. Material compounds can overcome this challenge by combining the advantages of different materials in one component. Lateral angular co-extrusion (LACE) allows the production of coaxial semi-finished products consisting of aluminum and steel. In this study, a finite element model of the LACE process was built up and validated by experimental investigations. A high degree of agreement between the calculated and experimentally determined forces, temperatures, and the geometrical shape of the hybrid profiles was achieved. In order to determine suitable parameters for further extrusion experiments, the influence of different process parameters on material flow and extrusion force was investigated in a numerical parametric study. Both the temperature and extrusion ratio showed a significant influence on the occurring maximum extrusion force as well as the material flow inside the LACE tool. The maximum force of 2.5 MN of the employed extrusion press was not exceeded. An uneven material flow was observed in the welding chamber, leading to an asymmetric position of the steel rod in the aluminum matrix.
KW - Aluminum-steel compound
KW - Co-extrusion
KW - FEM
KW - Tailored forming
UR - http://www.scopus.com/inward/record.url?scp=85053782955&partnerID=8YFLogxK
U2 - 10.3390/met8090717
DO - 10.3390/met8090717
M3 - Article
AN - SCOPUS:85053782955
VL - 8
JO - Metals
JF - Metals
SN - 2075-4701
IS - 9
M1 - 717
ER -