Effect of Ultrasonic Vibration on Compression Behavior and Microstructural Characteristics of Commercially Pure Aluminum

Bagherzadeh, Saeed; Abrinia, Karen

doi:10.1007/s11665-015-1730-8

Cited by 34 publications

(10 citation statements)

References 30 publications

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“…What is more important, one can see that deformation with the action of ultrasonic vibrations resulted in a certain increase in microhardness, which is especially visible in zone II, with the highest deformation degree. This increase in strength can be attributed to the acoustic residual hardening effect that was observed from experimental results ( Figure 9 ) as a rise up in the flow stress level as well as the grain refinement [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…The investigation of Liu et al [ 26 ] indicated that the ultrasonic wave during the upsetting process leads to fabricating the UFG structure on the pure copper cone tips. Although multiple studies have shown a beneficial effect of the USV on the structure and mechanical properties [ 27 , 28 , 29 ], the detailed research concerning vibration impact on the material formability as well as grain refinement in the Al–Mg alloy system is limited. To date, we found only one publication related to the application of USV [ 30 ] in the Al–Mg alloy system and a few related to the Al–Mg–Si system [ 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

et al. 2021

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To date, numerous investigations have shown the beneficial effect of ultrasonic vibration-assisted forming technology due to its influence on the forming load, flow stress, friction condition reduction and the increase of the metal forming limit. Although the immediate occurring force and mean stress reduction are known phenomena, the underlying effects of ultrasonic-based material softening remain an object of current research. Therefore, in this article, we investigate the effect of upsetting with and without the ultrasonic vibrations (USV) on the evolution of the microstructure, stress relaxation and hardness of the AlMg3 aluminum alloy. To understand the process physics, after the UAC (ultrasonic assisted compression), the microstructures of the samples were analyzed by light and electron microscopy, including the orientation imaging via electron backscatter diffraction. According to the test result, it is found that ultrasonic vibration can reduce flow stress during the ultrasonic-assisted compression (UAC) process for the investigated aluminum–magnesium alloy due to the acoustic softening effect. By comparing the microstructures of samples compressed with and without simultaneous application of ultrasonic vibrations, the enhanced shear banding and grain rotation were found to be responsible for grain refinement enhancement. The coupled action of the ultrasonic vibrations and plastic deformation decreased the grains of AlMg3 alloy from ~270 μm to ~1.52 μm, which has resulted in a hardness enhancement of UAC processed sample to about 117 HV.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

et al. 2021

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“…We substantiate the composition of ψ NU as follows. The power function A 1 S A 2 m in (9) reflects numerous studies carried out on zinc, cadmium, aluminum, copper, and steel Bagherzadeh and Abrinia (2015), Geibler et al (2009), Huang et al (2009), Lum et al (2009), Yao et al (2012), Zhou et al (2018), andKulemin (1978). They report that the number of ultrasound-induced defects, and therefore the magnitude of ultrasonic softening depends on the ultrasonic stress amplitude.…”

Section: Extension Of the Synthetic Theory To The Case Of Ultrasound-assisted Creepmentioning

confidence: 99%

An analytic description of the creep deformation of metals in the ultrasonic field

Rusinko

Alhilfi

Rusinko

2021

Mech Time-Depend Mater

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The effect of superimposed ultrasonic vibration on the primary creep of metals is modeled in terms of the synthetic theory of irrecoverable deformation. We consider two sonication modes: (i) the ultrasound acts continuously during the deformation, and (ii) the ultrasound is periodically on and off. Whereas both cases show a significant increase in primary creep, the periodical sonication leads to higher deformation values. To catch the phenomenon of ultrasound-assisted creep, we extend the flow rule equation by a term that accounts for the process occurring on the microlevel of material induced by ultrasound.

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“…The focus of these investigations, such as those of Nevill et al (1957) [3] or Blaha and Langenecker (1959) [4] was especially on superimposed oscillation forming in the ultrasonic frequency range. Izumi et al [5], as well as Begherzadeh and Abrinia [6], observed a reduction in the yield stress because of softening effects due to superimposed oscillation forming. As an explanation for the oscillation-based reduction of average forming force, two main approaches can be identified in literature [7].…”

Section: Introductionmentioning

confidence: 96%

Influence of Tailored Surfaces and Superimposed-Oscillation on Sheet-Bulk Metal Forming Operations

Behrens

Tillmann

Biermann

et al. 2020

JMMP

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Producing complex sheet metal components in fewer process steps motivated the development of the innovative forming process called sheet-bulk metal forming (SBMF). In this process, sheet metal forming and bulk-metal forming are combined to create a unique forming process in which a component with external and internal gearing is produced in three production steps. However, the high degrees of deformation that occur using high-strength steels and the number of different process steps result in high process forces, strongly limiting the service life of tools. To reduce the forming force during SBMF processes, tool and process modifications were investigated. Therefore, plane-strain compression tests were conducted to examine the influence of a CrAlN PVD coating and tailored surfaces produced by high-feed milling (HF) of tool-active elements on the material flow of the specimens. In addition to the tool-sided modifications, the influence of an oscillation overlay during the forming process was investigated. Based on the results of the compression tests, the surfaces of the active tool elements of the SBMF process were modified in order to transfer the basic experimental results to the production of a functional component. The friction is thus adapted locally in the SBMF process.

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Effect of Ultrasonic Vibration on Compression Behavior and Microstructural Characteristics of Commercially Pure Aluminum

Cited by 34 publications

References 30 publications

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

An analytic description of the creep deformation of metals in the ultrasonic field

Influence of Tailored Surfaces and Superimposed-Oscillation on Sheet-Bulk Metal Forming Operations

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