Friction—Assisted Extrusion of Thin Strips of Aluminium Composite Material from Powder Metals

Nakamura, Takayuki; Tanaka, Shigekazu; Hiraiwa, Masashi; Imaizumi, Haruki; Tomizawa, Yasuji; Osakada, Kozo

doi:10.1016/s0007-8506(07)61204-9

Cited by 11 publications

(5 citation statements)

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“…Nakamura et al [ 13 ] proposed the Friction-Assisted Extrusion (FAE) process to produce sheet metal. In their first work, a powder composed of pure aluminum and SiC ceramics was compacted into a bulk shape, then deformed by FAE with very large extrusion ratios to form thin strips.…”

Section: Introductionmentioning

confidence: 99%

“…The strips made of powder exhibited higher strength than those from bulk material. In both studies of the FAE process [ 13 , 14 ], the authors show that the unique advantage of FAE is the considerably lower compression pressure needed in FAE compared to conventional extrusion processes at the same extrusion ratios, thanks to the assistance of the friction force.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure, Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral Extrusion

Tóth

Beygelzimer

et al. 2021

Materials

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The Friction-Assisted Lateral Extrusion Process (FALEP) is a severe plastic deformation (SPD) technique for producing metal sheets from bulk metal or powder in one single deformation step at room temperature. In the present work, aluminum Al-1050 was deformed by FALEP. Then, its microstructure was examined by EBSD; the crystallographic texture by X-ray; material strength, ductility, and the Lankford parameter by tensile testing; the latter also by polycrystal plasticity simulations. It is shown that the microstructure was highly refined, with the grain size reduced more than 160 times down to 600 nm under the imposed shear strain of 20. The obtained texture was a characteristic simple shear texture with a shear plane nearly parallel to the plane of the sheet. The yield and ultimate strengths increased by about 10 times and three times, respectively. The Lankford parameter was 1.28, which is very high for aluminum, and due to the specific shear texture, unusual in a sheet. All these exceptional characteristics of Al-1050 were obtained thanks to the efficiency of the FALEP SPD process, which is a promising candidate for industrial applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure, Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral Extrusion

Tóth

Beygelzimer

et al. 2021

Materials

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“…The reinforcing material is directly fed in form of continuous elements and embedded during the extrusion process. In comparison to conventional composite extrusion processes using particle or fibre reinforced billets [3], the developed alternative process for the embedding of continuous reinforcing elements, like e.g. wires, offers great advantages concerning necessary extrusion forces and load-adapted reinforcement.…”

Section: Reinforced Extruded Profilesmentioning

confidence: 99%

“…The process principle is shown in Figure 1. Despite the fact that basic ideas regarding that topic were published in the past -the authors reinforced billets with particles for conventional extrusion [3], bi-metallic billets for co-extrusion [4], special processes [5], and tools for continuous embedding of one material within an extruded profile [6] -a lot of research work was done in order to use that technique for manufacturing of innovative lightweight structures. Especially the process stability based on failures such as reinforcement deflection, reinforcement cracking, and the usability of different kinds of wires and wire ropes is of great interest.…”

Section: Reinforced Extruded Profilesmentioning

confidence: 99%

Innovation by forming technology: motivation for research

et al. 2009

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This paper focuses on new forming techniques for the improvement of product quality, the reduction of process chains and the saving of our available resources. The presented and discussed technologies cover extrusion of reinforced profiles, bending of profiles, single point incremental forming of polymers, and tool systems made of polymers coated by hard metal as well as re-manufacturing strategies. Beside the process principles and advantages several results from numerical and experimental investigations will be given in order to show the motivation for fundamental and application oriented research in the field of forming technology.

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“…This process has advantages in relation to forward extrusion in the way that it requires less extrusion force. In the friction assisted extrusion process considered by Nakamura et al [8], the friction drag force over the tool surface is used to cause plastic flow of the work metal, and high reduction in area can be achieved with a low punch pressure.…”

Section: Introductionmentioning

confidence: 99%

Velocity Field in Direct, Indirect and Friction Assisted Extrusion of Al

Khorasani

Valberg

2013

KEM

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This study investigates the velocity fields that are descriptive for the forward, backward and friction assisted extrusion of axisymmetric rods. The Avitzur theory was used to calculate the velocity field and strain rate in extrusion of Al alloys. Several simulations have also been performed by using finite element analysis (FEA) with DEFORM 2D, in order to find the admissible velocity field for different conditions of friction including high and low friction. The results from FEA and theory of axisymmetric extrusion are compared to see if there is good agreement. The correlation between the data obtained by theory and FEA is discussed.

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Friction—Assisted Extrusion of Thin Strips of Aluminium Composite Material from Powder Metals

Cited by 11 publications

References 0 publications

Microstructure, Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral Extrusion

Microstructure, Texture and Mechanical Properties in Aluminum Produced by Friction-Assisted Lateral Extrusion

Innovation by forming technology: motivation for research

Velocity Field in Direct, Indirect and Friction Assisted Extrusion of Al

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