New insight on acoustoplasticity – Ultrasonic irradiation enhances subgrain formation during deformation

Siu, Kai Wing; Ngan, A.H.W.; Jones, I.P.

doi:10.1016/j.ijplas.2010.09.007

Cited by 142 publications

(55 citation statements)

References 28 publications

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“…This increase can be attributed to the acoustic residual hardening effect that was observed from experimental results as a rise up in the flow stress level. This phenomenon also can be described by increasing of dislocation density that occurs due to severe plastic deformation of sample in high-impact upsetting as reported by (Ref 4,23). Figure 15(b) shows the distribution of microhardness values in three regions of sample.…”

Section: Microhardnesssupporting

confidence: 60%

“…As predicted by model, the dislocation density into the aluminum increases during plastic deformation in both CCT and UACT that indicates strain hardening phenomenon. The more increase of dislocation density into the sample in UACT against CCT can be described by a superimposed high-frequency impact on sample that leads to a more plastic deformation several-fold as observed by experimental researches ( Ref 10,23,35). Furthermore, the increase in the vibration amplitude in UACT leads to a gradual increase in dislocation density curve indicating a possible recovery of dislocation density in the large amount of vibration amplitudes.…”

Section: Variation Of Dislocationmentioning

confidence: 73%

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

Bagherzadeh

Abrinia

2015

J. of Materi Eng and Perform

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The principle objective of this research is to investigate the modeling of compression behavior and microstructural evolution of pure aluminum in the ultrasonic-assisted compression test. A dislocation density-based constitutive model was developed based on the existing frameworks and calibrated using experimental data to predict the stress-strain response of pure aluminum during UAC tests. An experimental set-up was designed to work at resonance condition with frequency of around 20 kHz and variant longitudinal vibration amplitudes at the range of 0$20 lm. The verified model and experimental samples were used for parameter studies and the study of grain formation of aluminum after conventional and ultrasonic upsetting. Results showed that the developed constitutive model was able to predict compression behavior of aluminum suitably. An increase in the flow stress drop, residual flow stress, and dislocation density occurred when the applied vibration intensity was raised. In addition, it was observed that the more homogenous microstructure with nearly equiaxed grains and also the higher microhardness values can be achieved when ultrasonic vibration is imposed on samples during compression test.

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Section: Microhardnesssupporting

confidence: 60%

Section: Variation Of Dislocationmentioning

confidence: 73%

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

Bagherzadeh

Abrinia

2015

J. of Materi Eng and Perform

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“…This process is called vibration-assisted ball burnishing (VABB), and has barely been explored so far in the scientific literature. The physical phenomena on which VABB is based is called acoustoplasticity, that is, the overall reduction of the quasi-static stress required to deform a material as a result of the superimposition of vibrations on the deforming force [15].…”

Section: Introductionmentioning

confidence: 99%

Topological surface integrity modification of AISI 1038 alloy after vibration-assisted ball burnishing

Jerez-Mesa

Landon

Travieso-Rodríguez

et al. 2018

Surface and Coatings Technology

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The objective of this paper is to analyze the effect of the vibration-assisted ball burnishing process on the topology of AISI 1038 flat surfaces, in order to evaluate its feasibility for surface enhancement towards wear prevention and fatigue enhancement in industrial components. With that aim, an experimental campaign based on a Taguchi orthogonal matrix has been deployed. Five factors were studied, namely: preload force, number of passes, feed, initial surface texture and strategy. The topologies of the resulting burnishing patches have been acquired with a non-contact optical device, and the 3D texture parameters have been calculated to quantify the effects of burnishing. In all cases, the bearing capacity of the burnished surfaces was improved, as the proportion of core material is increased due to the deformation of the surface peaks. The initial surface state proved to be the most influential parameter on amplitude, spatial, and volumetric parameters. In all cases, a set of optimal vibration-assisted ball burnishing parameters was found for the sake of reproducibility and systematization of the process. Finally, results have been compared to the conventional ball burnishing process, observing that it presents scratch damage on the surfaces that can be prevented through assistance through vibrations.

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“…This proposition is supported by the phenomenon of oscillation-enhanced subgrain formation in the field of acoustoplasticity. It is demonstrated in [28] that the applied oscillation loading can promote the rearrangement of dislocations and thereby the formation of subgrains. In fact, cyclic loading is also a kind of oscillation loading.…”

Section: Evolution Of Dislocation Structurementioning

confidence: 99%

Evolution of dislocations and twins in high cycle fatigue of a twinning-induced plasticity steel

Wang

Liang

Liu

et al. 2015

Materials Science and Engineering: A

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New insight on acoustoplasticity – Ultrasonic irradiation enhances subgrain formation during deformation

Cited by 142 publications

References 28 publications

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

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

Topological surface integrity modification of AISI 1038 alloy after vibration-assisted ball burnishing

Evolution of dislocations and twins in high cycle fatigue of a twinning-induced plasticity steel

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