TY - JOUR

T1 - Lateral angular co-extrusion

T2 - Geometrical and mechanical properties of compound profiles

AU - Thürer, Susanne Elisabeth

AU - Peddinghaus, Julius

AU - Heimes, Norman

AU - Bayram, Ferdi Caner

AU - Bal, Burak

AU - Uhe, Johanna

AU - Behrens, Bernd-Arno

AU - Maier, Hans-Jürgen

AU - Klose, Christian

N1 - Funding information: 2. MAa tsecrhieamlsaatnicd seMcteitohno tdhsrough the developed modular tool is shown in Figure 2a. Since the LACE process involves the feeding of a rigid reinforcing element instead of a wire, a mandrel part was designed, which is supported by three support arms in the tool housing. In this concept, the aluminum alloy is divided into two metal streams by the portholes in the middle of the symmetrically designed entry. Both metal strands are then directed into pockets milled into each half of the tool cavity. This is intended to change the material flow in such a way that the aluminum alloy evenly envelops the reinforcing element and displacement and/or distortion of the compound profile is avoided. The aluminum alloy then flows around the mandrel part inside the tool. The reinforcing element, in this case a steel tube, is inserted into the tool orthogonally to the movement direction of the extrusion punch and guided through the clamping cover and the mandrel part. This also ensures a coTheaxial position of the taluminum alloy thenube in the comflows aroundpound profile. the mandrel part inside the tool. The reinforcing element, in

PY - 2020/9

Y1 - 2020/9

N2 - A novel co-extrusion process for the production of coaxially reinforced hollow profiles has been developed. Using this process, hybrid hollow profiles made of the aluminum alloy EN AW-6082 and the case-hardening steel 20MnCr5 (AISI 5120) were produced, which can be forged into hybrid bearing bushings by subsequent die forging. For the purpose of co-extrusion, a modular tooling concept was developed where steel tubes made of 20MnCr5 are fed laterally into the tool. This LACE (lateral angular co-extrusion) process allows for a variation of the volume fraction of the reinforcement by using steel tubes with different wall thicknesses, which enabled the production of compound profiles having reinforcement contents of either 14 vol.% or 34 vol.%. The shear strength of the bonding area of these samples was determined in push-out tests. Additionally, mechanical testing of segments of the hybrid profiles using shear compression tests was employed to provide information about the influence of different bonding mechanisms on the strength of the composite zone.

AB - A novel co-extrusion process for the production of coaxially reinforced hollow profiles has been developed. Using this process, hybrid hollow profiles made of the aluminum alloy EN AW-6082 and the case-hardening steel 20MnCr5 (AISI 5120) were produced, which can be forged into hybrid bearing bushings by subsequent die forging. For the purpose of co-extrusion, a modular tooling concept was developed where steel tubes made of 20MnCr5 are fed laterally into the tool. This LACE (lateral angular co-extrusion) process allows for a variation of the volume fraction of the reinforcement by using steel tubes with different wall thicknesses, which enabled the production of compound profiles having reinforcement contents of either 14 vol.% or 34 vol.%. The shear strength of the bonding area of these samples was determined in push-out tests. Additionally, mechanical testing of segments of the hybrid profiles using shear compression tests was employed to provide information about the influence of different bonding mechanisms on the strength of the composite zone.

KW - Hybrid metal components

KW - Lateral angular co-extrusion

KW - Mechanical behavior

KW - Tailored forming

UR - http://www.scopus.com/inward/record.url?scp=85093880036&partnerID=8YFLogxK

U2 - 10.3390/met10091162

DO - 10.3390/met10091162

M3 - Article

VL - 10

SP - 1

EP - 15

JO - Metals

JF - Metals

SN - 2075-4701

IS - 9

M1 - 1162

ER -