Extrusion of hybrid sheet metals

Engelhardt, M.; Grittner, N.; Haverkamp, H.; Reimche, W.; Bormann, Dirk; Bach, Friedrich‐Wilhelm

doi:10.1016/j.jmatprotec.2011.12.013

Cited by 19 publications

(5 citation statements)

References 15 publications

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“…5a. The co-extrusion of dissimilar metals introduces processing parameters including relative material flow and friction that may induce tensile and shear stresses resulting in surface cracking and failure [49]. Groche et al [60] performed a microscopic analysis of the weld interface between steel and aluminium material pairs formed with this process revealing only a small diffusion zone and significant oxide build-up at the weld inter-face.…”

Section: Co-extrusion Of Dissimilar Metalsmentioning

confidence: 99%

Review of recent developments in manufacturing lightweight multi-metal gears

Politis

Lin

2021

Prod. Eng. Res. Devel.

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This paper provides a review of recent developments in the manufacturing of lightweight multi-metal components, and in particular gears. The literature has shown that significant efforts have been made in manufacturing light gears and numerous technical challenges exist when designing for and manufacturing with dissimilar metals including challenges in heating technologies, mechanical performance, processing parameters, metal compatibility and the interface layer between adjacent materials, as well as difficulties in multi-metal simulations. Whilst the scope of multi-metal manufacturing is vast, the main concentration of this study is on the main stages of multi-metal gear production, and specifically on preform production, multi-metal heating, intermetallic bonding, and modelling of essential forming parameters. The effects of each of these methods as well as the numerous approaches studied in the literature are presented, with a recommendation being made as to a processing route that may lead to a robust multi-metal gear with minimal production line modifications to conventional steel gears.

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Section: Co-extrusion Of Dissimilar Metalsmentioning

confidence: 99%

Review of recent developments in manufacturing lightweight multi-metal gears

Politis

Lin

2021

Prod. Eng. Res. Devel.

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“…For forming processes, bimetallic materials composed of Magnesium and Aluminum (Mg-Al) have exhibited potential applications due to their good formability compared to other material combinations [11]. MONDAL et al (2021) employed friction-assisted forging to shape a bimetallic ring.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Analysis of the Forging of a Bimetallic Crosshead

Rosiak,

Santos,

Alba

et al. 2023

Advances in Materials Science

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The automobile sector has been making increasing efforts to reduce the weight of automobiles, aiming at mitigating pollutant gas emissions. The use of innovative concepts, such as bimetallic components, has become attractive because it makes it possible to increase the strength-to-weight ratio of the components. In this study, the hot forging of a bimetallic crosshead is investigated. In the process, a billet with a cylindrical core of the magnesium alloy AZ61 is enclosed with a hollow cylinder of the aluminum alloy AA 6351 and forged at 400°C. The objective is to reconcile the low density of Mg alloys with the high corrosion resistance of Al alloys. In parallel, a finite element analysis of the process was carried out.

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“…Co-extrusion has been investigated by several authors with different material combinations since the early 1970s [1][2][3][4][5]. Material composites from Mg and Al showed a good formability in contrast to other material combinations, where core fracture was observed [6]. Many investigations have focused on pressing billet geometry, variations of cladding and core material (cladding: Mg, core: Al, and vice versa) [7], or geometry of co-extruded products (e.g., sheets [6], profiles [8], tubes [9] or bar-shaped rods [10][11][12]).…”

Section: Introductionmentioning

confidence: 99%

Process Chain for the Production of a Bimetal Component from Mg with a Complete Al Cladding

Förster

Binotsch

Awiszus

2018

Metals

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With respect to its density, magnesium (Mg) has a high potential for lightweight components. Nevertheless, the industrial application of Mg is limited due to, for example, its sensitivity to corrosion. To increase the applicability of Mg, a process chain for the production of a Mg component with a complete aluminum (Al) cladding is presented. Hydrostatic co-extrusion was used to produce bar-shaped rods with a diameter of 20 mm. The bonding between the materials was verified by ultrasonic testing. Specimens with a length of 79 mm were cut off from the rods and forged by using a two-staged process. After the first step (Heading), the Mg core was removed partially by drilling to ensure a complete enclosing of the remaining Mg during the second forging step (Net shape forging). The geometry of the drilling hole and the heading die design were dimensioned with the Finite Element-simulation software FORGE. Hence, a complete Al-enclosed Mg component was achieved by using the described process chain and forming processes. Microstructural investigations confirm the formation of an intermetallic interface as expected.

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Extrusion of hybrid sheet metals

Cited by 19 publications

References 15 publications

Review of recent developments in manufacturing lightweight multi-metal gears

Review of recent developments in manufacturing lightweight multi-metal gears

Numerical and Experimental Analysis of the Forging of a Bimetallic Crosshead

Process Chain for the Production of a Bimetal Component from Mg with a Complete Al Cladding

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