Microstructure and Mechanical Characterization of Aluminum Seamless Tubes Produced by Friction Stir Back Extrusion

Mathew, N.; Dinaharan, I.; Vijay, S.J.; Murugan, N.

doi:10.1007/s12666-016-0841-8

Cited by 25 publications

(7 citation statements)

References 33 publications

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“…However, by technological advancement, new recycling techniques have emerged, such as the friction stir back extrusion (FSBE), enabling the shops to recycle the metal chips into extruded products directly. 9 , 10…”

Section: Introductionmentioning

confidence: 99%

Optimization of microstructural and mechanical properties of brass wire produced by friction stir extrusion using Taguchi method

Akbari

Asadi

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Friction stir back extrusion is used to produce brass wires from its chips, and then the process parameters are optimized using Taguchi L9 orthogonal design of experiments. The rotational speed, traverse speed, and the produced wire diameter are the parameters taken into consideration. The optimum process parameters are determined with respect to grain size, microhardness, and ultimate pressure strength of the produced samples. The predicted optimum values for output parameters are confirmed by conducting the confirmation test using optimum parameters. Analysis of variance shows that the rotational speed is the most dominant factor in determining the grain size and microhardness of the produced wires, and the tool traverse speed and the wire diameter are the second and the third effective parameters. However, in terms of the produced wires ultimate pressure strength, the traverse speed is the most dominant factor rather than the rotational speed. The optimum values for the rotational speed, the traverse speed, and the wire diameter are 500 r/min, 31.5 mm/min, and 6 mm, respectively, and the produced wire, by these optimum parameters, presents 14.17 µm, 127.1 HV, and 904.7 MPa for the grain size, the microhardness, and the ultimate pressure strength, respectively.

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Section: Introductionmentioning

confidence: 99%

Optimization of microstructural and mechanical properties of brass wire produced by friction stir extrusion using Taguchi method

Akbari

Asadi

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Mathew et al 30 investigated AA 6061-T6 FSBE seamless tubes and showed that the process resulted in a continuous defect free tubes with an average grain size of 39 mm for multiple locations along the tube's wall and 3.5 and 20 mm for the stir zone and parent alloy, respectively. They also reported that the lowest micro hardness value is at the stirring zone although it exhibits an equiaxed grain structure.…”

Section: Introductionmentioning

confidence: 99%

“…They also reported that the lowest micro hardness value is at the stirring zone although it exhibits an equiaxed grain structure. 30 They attributed that to the increase in frictional heat and exposure time which reduces the effect of T6 heat treatment. The compressive behavior of AA 6061 processed tubes were also studied and showed a ring (concertina) failure type which is most favorable for aluminum tubes.…”

Section: Introductionmentioning

confidence: 99%

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Optimization of friction stir back extrusion mechanical properties and productivity of magnesium AZ31-B seamless tubes

Alhourani

Awad

Nazzal

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Friction Stir Back Extrusion (FSBE) is a new sustainable manufacturing process capable of producing fine grained lightweight tubular shapes. The objective of this work is to investigate the impact of rotational speed and feed rate on the mechanical properties, cycle time and power consumption of friction stir back extruded Mg AZ31-B tubes and determine the optimal settings. FSBE experiments and tensile tests were performed to characterize the mechanical properties of the produced tubes. The investigation is conducted utilizing Response Surface Methodology (RSM) and desirability multi-response optimization technique. Results suggest that ultimate tensile strength and toughness are impacted by both rotational speed and feed rate and are more sensitive to speed. However, both process parameters did not show a significant statistical impact on elongation. Optimal parameters for mechanical properties were identified at a rotational speed of 1767 rpm and feed rate of 102 mm/min. The optimal settings to maximize mechanical properties, minimize power consumption, and maximize productivity were 2000 rpm and 116 mm/min.

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“…So, they concluded that an adequate heat dissipation during FSBE is required to control the evolution of microstructure. Similarly, Mathew et al [12] produced aluminum seamless tubes by deforming the solid cylindrical bars utilizing the FSBE. They indicated this process is capable to produce defect-free aluminum seamless tubes.…”

Section: Introductionmentioning

confidence: 99%

Brass Wire Forming By Friction Stir Back Extrusion: Numerical Modeling and Experiment

Akbari

Asadi

2021

Preprint

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Friction stir back extrusion (FSBE) is used to produce brass wires and then, Numerical modeling is developed to simulate the FSBE of brass based on the Coupled Eulerian-Lagrangian technique (CEL) and verified by experiments. Next, the effects of FSBE parameters such as tool rotational and plunging speed on the strain and temperature distributions, microstructure, and patterns of material flow are studied. The results show that, the highest temperature and strain occurs near the tool/workpiece interface, but in a further distance from the tool axis. Additionally, in the cross section of a FSBE wire, the microstructure is finer in the periphery of the sample. A higher rotational speed or a lower plunging speed results in a coarser microstructure. The material flow pattern during the process is conical helix, and does not change meaningfully by the process parameters. The points at the further distance from the tool axis, along with an upward movement, experience an inward spiral movement which is amplified by higher rotational speed. However, the materials very near the tool axis almost take an upward movement and endure a very lower strain.

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Microstructure and Mechanical Characterization of Aluminum Seamless Tubes Produced by Friction Stir Back Extrusion

Cited by 25 publications

References 33 publications

Optimization of microstructural and mechanical properties of brass wire produced by friction stir extrusion using Taguchi method

Optimization of microstructural and mechanical properties of brass wire produced by friction stir extrusion using Taguchi method

Optimization of friction stir back extrusion mechanical properties and productivity of magnesium AZ31-B seamless tubes

Brass Wire Forming By Friction Stir Back Extrusion: Numerical Modeling and Experiment

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