Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 20th International ESAFORM Conference on Material Forming, ESAFORM 2017 |
| Editors | Dermot Brabazon, Inam Ul Ahad, Sumsun Naher |
| ISBN (electronic) | 9780735415805 |
| Publication status | Published - 16 Oct 2017 |
| Event | 20th International ESAFORM Conference on Material Forming, ESAFORM 2017 - Dublin, Ireland Duration: 26 Apr 2017 → 28 Apr 2017 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1896 |
| ISSN (Print) | 0094-243X |
| ISSN (electronic) | 1551-7616 |
Abstract
The combination of light metals and steels allows for new lightweight components with wear-resistant functional surfaces. Within the Collaborative Research Centre 1153 novel process chains are developed for the manufacture of such hybrid components. Here, the production process of a hybrid bearing bushing made of the aluminium alloy EN AW-6082 and the case-hardened steel 20MnCr5 is developed. Hybrid semi-finished products are an attractive alternative to conventional ones resulting from massive forming processes where the individual components are joined after the forming process. The actual hybrid semi-finished products were manufactured using a lateral angular co-extrusion (LACE) process. The bearing bushings are subsequently produced by die forging. In the present study, a tool concept for the LACE process is described, which renders the continuous joining of a steel rod with an aluminium tube possible. During the LACE process, the rod is fed into the extrusion die at an angle of approx. 90°. Metallographic analysis of the hybrid profile showed that the mechanical bonding between the different materials begins about 75 mm after the edge of the aluminium sheath. In order to improve the bonding strength, the steel rod is to be preheated during extrusion. Systematic investigations using a dilatometer, considering the maximum possible co-extrusion process parameters, were carried out. The variable parameters for the dilatometer experiments were determined by numerical simulation. In order to form a bond between the materials, the oxide layer needs to be disrupted during the co-extrusion process. In an attempt to better understand this effect, a modified sample geometry with chamfered steel was developed for the dilatometer experiments. The influence of the process parameters on the formation of the intermetallic phase at the interface was analysed by scanning electron microscopy and X-ray diffraction.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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Proceedings of the 20th International ESAFORM Conference on Material Forming, ESAFORM 2017. ed. / Dermot Brabazon; Inam Ul Ahad; Sumsun Naher. 2017. 140002 (AIP Conference Proceedings; Vol. 1896).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Co-Extrusion of Semi-Finished Aluminium-Steel Compounds
AU - Thürer, S. E.
AU - Uhe, J.
AU - Golovko, O.
AU - Bonk, C.
AU - Bouguecha, A.
AU - Klose, C.
AU - Behrens, B. A.
AU - Maier, H. J.
N1 - Funding information: The results presented in this paper were obtained within the subproject A1 “Influence of local microstructure on the formability of extruded composite profiles” of the Collaborative Research Centre 1153 ‘‘Process chain to produce hybrid high performance components by Tailored Forming’’. The authors thank the German Research Foundation (DFG) for their financial support.
PY - 2017/10/16
Y1 - 2017/10/16
N2 - The combination of light metals and steels allows for new lightweight components with wear-resistant functional surfaces. Within the Collaborative Research Centre 1153 novel process chains are developed for the manufacture of such hybrid components. Here, the production process of a hybrid bearing bushing made of the aluminium alloy EN AW-6082 and the case-hardened steel 20MnCr5 is developed. Hybrid semi-finished products are an attractive alternative to conventional ones resulting from massive forming processes where the individual components are joined after the forming process. The actual hybrid semi-finished products were manufactured using a lateral angular co-extrusion (LACE) process. The bearing bushings are subsequently produced by die forging. In the present study, a tool concept for the LACE process is described, which renders the continuous joining of a steel rod with an aluminium tube possible. During the LACE process, the rod is fed into the extrusion die at an angle of approx. 90°. Metallographic analysis of the hybrid profile showed that the mechanical bonding between the different materials begins about 75 mm after the edge of the aluminium sheath. In order to improve the bonding strength, the steel rod is to be preheated during extrusion. Systematic investigations using a dilatometer, considering the maximum possible co-extrusion process parameters, were carried out. The variable parameters for the dilatometer experiments were determined by numerical simulation. In order to form a bond between the materials, the oxide layer needs to be disrupted during the co-extrusion process. In an attempt to better understand this effect, a modified sample geometry with chamfered steel was developed for the dilatometer experiments. The influence of the process parameters on the formation of the intermetallic phase at the interface was analysed by scanning electron microscopy and X-ray diffraction.
AB - The combination of light metals and steels allows for new lightweight components with wear-resistant functional surfaces. Within the Collaborative Research Centre 1153 novel process chains are developed for the manufacture of such hybrid components. Here, the production process of a hybrid bearing bushing made of the aluminium alloy EN AW-6082 and the case-hardened steel 20MnCr5 is developed. Hybrid semi-finished products are an attractive alternative to conventional ones resulting from massive forming processes where the individual components are joined after the forming process. The actual hybrid semi-finished products were manufactured using a lateral angular co-extrusion (LACE) process. The bearing bushings are subsequently produced by die forging. In the present study, a tool concept for the LACE process is described, which renders the continuous joining of a steel rod with an aluminium tube possible. During the LACE process, the rod is fed into the extrusion die at an angle of approx. 90°. Metallographic analysis of the hybrid profile showed that the mechanical bonding between the different materials begins about 75 mm after the edge of the aluminium sheath. In order to improve the bonding strength, the steel rod is to be preheated during extrusion. Systematic investigations using a dilatometer, considering the maximum possible co-extrusion process parameters, were carried out. The variable parameters for the dilatometer experiments were determined by numerical simulation. In order to form a bond between the materials, the oxide layer needs to be disrupted during the co-extrusion process. In an attempt to better understand this effect, a modified sample geometry with chamfered steel was developed for the dilatometer experiments. The influence of the process parameters on the formation of the intermetallic phase at the interface was analysed by scanning electron microscopy and X-ray diffraction.
UR - http://www.scopus.com/inward/record.url?scp=85037696312&partnerID=8YFLogxK
U2 - 10.1063/1.5008158
DO - 10.1063/1.5008158
M3 - Conference contribution
AN - SCOPUS:85037696312
T3 - AIP Conference Proceedings
BT - Proceedings of the 20th International ESAFORM Conference on Material Forming, ESAFORM 2017
A2 - Brabazon, Dermot
A2 - Ul Ahad, Inam
A2 - Naher, Sumsun
T2 - 20th International ESAFORM Conference on Material Forming, ESAFORM 2017
Y2 - 26 April 2017 through 28 April 2017
ER -