TY - JOUR

T1 - Characterization of the Interface between Aluminum and Iron in Co-Extruded Semi-Finished Products

AU - Thürer, Susanne Elisabeth

AU - Peters, Kai

AU - Heidenblut, Torsten

AU - Heimes, Norman

AU - Peddinghaus, Julius

AU - Nürnberger, Florian

AU - Behrens, Bernd Arno

AU - Maier, Hans Jürgen

AU - Klose, Christian

N1 - Funding Information: This study was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)?CRC 1153?252662854, subproject A1. The authors gratefully acknowledge DFG?s financial support.

PY - 2022/3/1

Y1 - 2022/3/1

N2 - Within the framework of the Collaborative Research Center 1153, we investigated novel process chains for the production of bulk components with different metals as joining partners. In the present study, the co-extrusion of coaxially reinforced hollow profiles was employed to manufacture semi-finished products for a subsequent die-forging process, which was then used for the manufacture of hybrid bearing bushings. The hybrid hollow profiles, made of the aluminum alloy EN AW-6082 paired with either the case-hardening steel 20MnCr5, the stainless steel X5CrNi18-10, or the rolling bearing steel 100Cr6, were produced by Lateral Angular Co-Extrusion. Push-out tests on hybrid hollow sections over the entire sample cross-section showed shear strengths of 44 MPa ± 8 MPa (100Cr6) up to 63 MPa ± 5 MPa (X5CrNi18-10). In particular, the influence of force and form closure on the joint zone could be determined using specimen segments tested in shear compression. Locally, shear strengths of up to 131 MPa (X5CrNi18-10) were demonstrated in the shear compression test. From these samples, lamellae for microstructural analysis were prepared with a Focused Ion Beam. Detailed analyses showed that for all material combinations, a material bond in the form of an ultra-thin intermetallic phase seam with a thickness of up to 50 nm could be established.

AB - Within the framework of the Collaborative Research Center 1153, we investigated novel process chains for the production of bulk components with different metals as joining partners. In the present study, the co-extrusion of coaxially reinforced hollow profiles was employed to manufacture semi-finished products for a subsequent die-forging process, which was then used for the manufacture of hybrid bearing bushings. The hybrid hollow profiles, made of the aluminum alloy EN AW-6082 paired with either the case-hardening steel 20MnCr5, the stainless steel X5CrNi18-10, or the rolling bearing steel 100Cr6, were produced by Lateral Angular Co-Extrusion. Push-out tests on hybrid hollow sections over the entire sample cross-section showed shear strengths of 44 MPa ± 8 MPa (100Cr6) up to 63 MPa ± 5 MPa (X5CrNi18-10). In particular, the influence of force and form closure on the joint zone could be determined using specimen segments tested in shear compression. Locally, shear strengths of up to 131 MPa (X5CrNi18-10) were demonstrated in the shear compression test. From these samples, lamellae for microstructural analysis were prepared with a Focused Ion Beam. Detailed analyses showed that for all material combinations, a material bond in the form of an ultra-thin intermetallic phase seam with a thickness of up to 50 nm could be established.

KW - Aluminum–steel

KW - Co-extrusion

KW - Intermetallic phase seam

KW - Mechanical properties

UR - http://www.scopus.com/inward/record.url?scp=85125176728&partnerID=8YFLogxK

U2 - 10.3390/ma15051692

DO - 10.3390/ma15051692

M3 - Article

AN - SCOPUS:85125176728

VL - 15

JO - Materials

JF - Materials

SN - 1996-1944

IS - 5

M1 - 1692

ER -