Production of Wire From AA7277 Aluminum Chips via Friction-Stir Extrusion (FSE)

Behnagh, Reza Abdi; Mahdavinejad, Ramezanali; Yavari, A. R.; Abdollahi, Masoud; Narvan, Morteza

doi:10.1007/s11663-014-0067-2

Cited by 44 publications

(11 citation statements)

References 22 publications

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“…To determine the porosity of the compacts, the density of both types of chips was established to 0.0027g/mm 3 (according to the chemical composition). The average porosity was calculated using the followin formula [22,23,24], and then the reciprocal density was estimated:…”

Section: Compacting Chipsmentioning

confidence: 99%

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A Compacting Process of the en Aw 6060 Alloy

et al. 2015

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Abstract. This study reports on an investigation of factors affect the process of compacting Al chips which are used to direct scrap processing through the forward extrusion method. EN AW 6060 chips of different geometry and types were mainly used as the experimental material. The chips were compacted in a die with a vertical channel (10.3 mm in diameter). To provide a range of processing conditions, three different weights were selected and compacting was performed under five, different compacting pressures. The movement of the chips within the die during compacting was analysed through numerical simulations using Deform 2D software. Study of the compacting process optimal parameters for increasing the density and enhancing the density distribution were defined. The results from our study clearly show that optimal conditions are obtained when the proportion of D/h is 1/1.1. Moreover, it was recognized that in the process of small chips compacting, there was obtained lower density than in the case of large chips.

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Section: Compacting Chipsmentioning

confidence: 99%

“…The first stage of processing is therefore very important. The most widely-used methods for extruding of compacted chips are forward extrusion [17,18], extrusion through bridge dies [2,4,13], and new technologies, such as equal channel angular pressing (ECAP) [20][21][22][23] and friction stir wire extrusion [24].…”

Section: Introductionmentioning

confidence: 99%

A Compacting Process of the en Aw 6060 Alloy

et al. 2015

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“…The stirring action of the tool plastically deformed the materials and forced them into the extrusion chamber. Finally, after densifying and heating, fully densed rods were extruded [28]. Kolpak et al [29] studied the direct conversion of AA 6060 machining chips into finished parts by hot extrusion with subsequent cold extrusion.…”

Section: Introductionmentioning

confidence: 99%

A novel approach to enhance mechanical properties during recycling of aluminum alloy scrap through friction stir consolidation

Latif

Ingarao

Gucciardi

et al. 2021

Int J Adv Manuf Technol

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Solid state recycling (SSR) is a new approach for making metals recycling more efficient with respect to remelting-based approaches. Friction stir consolidation (FSC) is a new solid-state process that is employed to recycle metallic scraps. Until now, a single-step FSC process was applied to recycled metal chips. During the single-step approach, critical processes parameters, especially processing time and rotational speed, are considered vital to control the quality and mechanical properties of the billet. However, the effectiveness of process parameters is highly restricted by challenging masses of recycling chips and machine competency. The present study first highlights the issues of the single-step FSC process, such as unconsolidated billet and poor mechanical properties at the bottom of the part, i.e., far away from the stirring action. Then, for the first time, three different two-step FSC methods were introduced as new approaches to overcome the existing challenges of the single-step method. The effectiveness of these methods was evaluated through the Vickers hardness measurements, and microstructure analysis. The results showed that two-step FSC methods successfully led to a fully consolidated billet and considerably improved mechanical properties.

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“…Softened materials stick and rotate relative to plunger trapped heat causes softening as well as joining and extruding of material upward in case of milling machine and side in case of lathe machine utilization through the movement of the tool. The tool movement can be continued as long as the amount of aluminium scraps inside the chamber is sufficient to reach desirable depth (Behnagh et al, 2014). From the literature studies, it can be seen that the FSE technique can join by thermo-mechanical friction technique and extruding softened metal scraps including aluminium, magnesium and their alloys.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and mechanical characterization of square bar made of aluminium scraps through friction stir back extrusion process

Gelaw

Ramulu

Hailu

et al. 2018

JEDT

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Purpose The purpose of this paper is to manufacture an aluminium square cross-sectional bar by using conventional lathe machine from aluminium scraps through friction stir back extrusion (FSBE) process and study the viability of the process to produce the square bar. Design/methodology/approach The important tasks involved in this work are as follows: designing and manufacturing the chamber and plunger components used for experimental work, experimentally studying the thermo-mechanical progression of FSBE process on adapted conventional lathe machine and analyzing the relation between controlled parameter (like rotational speed and consolidation time) and response parameter (like extrusion time, extrusion rate, grain structure and hardness). Findings Preliminary results show that increasing or decreasing rotational speeds results in defects. Cold crack and twisting defect were shown on square bar fabricated using low rotational speed, and hot crack defects were observed on surface of the bars produced by higher rotational speed. The manufactured square bars were tested using optical microscope and Vickers hardness tester. Microstructural studies reveal that initial grains of aluminium wire undergo significant refinement and result in equiaxed and recrystallized grains in the square bar fabricated through FSBE method. The hardness tests show almost even distribution of hardness in the specimen, but hardness was lower than parent aluminium; in comparison, uneven distribution of hardness was seen in parent aluminium. Originality/value FSBE process is the new method to produce the bars and rods with better mechanical properties. The ambition of this work is to convert the existing scrap materials to useful products. Based on the literature review, the work has planned to perform extrusion process with the minimum effort and limited sources. In this manner, the work is highly original and under scientific mandate.

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Production of Wire From AA7277 Aluminum Chips via Friction-Stir Extrusion (FSE)

Cited by 44 publications

References 22 publications

A Compacting Process of the en Aw 6060 Alloy

A Compacting Process of the en Aw 6060 Alloy

A novel approach to enhance mechanical properties during recycling of aluminum alloy scrap through friction stir consolidation

Manufacturing and mechanical characterization of square bar made of aluminium scraps through friction stir back extrusion process

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