Prediction of Cavitation Depth in an Al-Cu Alloy Melt with Bubble Characteristics Based on Synchrotron X-ray Radiography

Huang, Haijun; Shu, Da; Fu, Yanan; Zhu, Guoliang; Wang, Donghong; Dong, Anping; Sun, Baode

doi:10.1007/s11661-018-4603-6

Cited by 11 publications

(15 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The flow pattern induced by the acoustic stream can be tracked visibly using transparent analogues such as water, glycerine and ethanol [57]. In the case of liquid melts, it is difficult to directly observe the flow pattern induced by acoustic streaming, however, with reference to the transparent analogues, numerical solvers can be used to predict acoustic streaming and its effect on temperature gradient, flow velocity and acoustic pressure gradients [37,38,[58][59][60][61][62].…”

Section: Modelling and Validation Of Acoustic Streamingmentioning

confidence: 99%

“…Nonlinear models are required to more adequately capture the attenuation of pressure due to the presence of cavitating bubbles as shown in Figure 2. Huang et al [60] used an improved nonlinear Helmholtz model [61] to predict the cavitation depth in sonication of an AlCu melt. Lebon et al used Louisnard's model to compute acoustic pressures in water and aluminium vessels [35].…”

Section: Numerical Simulations Of the Acoustic Field In Crucibles Momentioning

confidence: 99%

See 1 more Smart Citation

Ultrasonic Cavitation Treatment of Metallic Alloys

Eskin¹,

Tzanakis²

2020

View full text Add to dashboard Cite

The current trend in solidification research is to develop a generic, energy-efficient, economical, sustainable, and pollution-free technology that can be applied to different alloy systems. Ultrasonic-cavitation melt treatment (UST) is a rather universal technology that can be applied to conventional and advanced metallic materials, regardless of their composition, while being environmentally friendly, cost effective, and ready to be implemented in conventional casting technologies such as direct-chill, continuous, or shape casting, as well as in emerging technologies of additive manufacturing and nanocomposite materials. The beneficial effects of UST-such as in assisted nucleation, activation of substrates (wetting), deagglomeration and fragmentation of solid phases, degassing of the melt, and grain refinement of the as-cast product-stem from the growth, collapse, and implosion of cavitation bubbles as aresult of alternate fluctuations in ultrasonic pressure. Although successfully demonstrated on the laboratory and pilot scale, UST has not yet found widespread industrial implementation. This is mostly due to the lack of in-depth understanding of the fundamental mechanisms behind the improved metal quality and structure refinement. Thus, fundamental research is needed to answer the following practical questions: What is the optimum melt flow rate that maximizes treatment efficiency whilst minimizing input power, cost, and plant complexity? What is the optimum operating frequency and acoustic power that accelerates the treatment effects? What is the optimum location of an ultrasonic power source in the melt transfer system in relation to the melt pool geometry? Answering these questions will pave the way for widespread industrial use of ultrasonic melt processing with the benefit of improving the properties of lightweight structural alloys, simultaneously alleviating the present use of polluting (Cl, F) for degassing or expensive (Zr, Ti, B, Ar) grain refinement additives.

show abstract

Section: Modelling and Validation Of Acoustic Streamingmentioning

confidence: 99%

Section: Numerical Simulations Of the Acoustic Field In Crucibles Momentioning

confidence: 99%

Ultrasonic Cavitation Treatment of Metallic Alloys

Eskin¹,

Tzanakis²

2020

View full text Add to dashboard Cite

show abstract

“…Nonlinear models are required to more adequately capture the attenuation of pressure due to the presence of cavitating bubbles as shown in Figure 2. Huang et al [60] used an improved nonlinear Helmholtz model [61] to predict the cavitation depth in sonication of an AlCu melt. Lebon et al used Louisnard’s model to compute acoustic pressures in water and aluminium vessels [35].…”

Section: Numerical Simulations Of the Acoustic Field In Cruciblesmentioning

confidence: 99%

Numerical Modelling of the Ultrasonic Treatment of Aluminium Melts: An Overview of Recent Advances

et al. 2019

View full text Add to dashboard Cite

The prediction of the acoustic pressure field and associated streaming is of paramount importance to ultrasonic melt processing. Hence, the last decade has witnessed the emergence of various numerical models for predicting acoustic pressures and velocity fields in liquid metals subject to ultrasonic excitation at large amplitudes. This paper summarizes recent research, arguably the state of the art, and suggests best practice guidelines in acoustic cavitation modelling as applied to aluminium melts. We also present the remaining challenges that are to be addressed to pave the way for a reliable and complete working numerical package that can assist in scaling up this promising technology.

show abstract

“…Previous research on USMP has identified three main mechanisms for ultrasound enhanced grain nucleation, namely, (1) cavitation induced homogenous nucleation, (2) cavitation activated heterogeneous nucleation, and (3) cavitation or acoustic flow-induced grain multiplication [7] , [8] , [9] .…”

Section: Introductionmentioning

confidence: 99%

Ultrasound cavitation induced nucleation in metal solidification: An analytical model and validation by real-time experiments

Huang

Qin

Tang

et al. 2021

Ultrasonics Sonochemistry

Self Cite

View full text Add to dashboard Cite

Highlights An analytical model is developed to predict the cavitation induced undercooling, grain nucleation and the solidified grain size. Cavitation bubble implosion in metallic melts were imaged in-situ by ultrafast synchrotron X-ray imaging. The model takes into account of ultrasound input intensity, cavitation bubble size and the effect of melt temperature. The solidified grain size of different alloys were calculated using this model and compared with the experimental data.

show abstract

Prediction of Cavitation Depth in an Al-Cu Alloy Melt with Bubble Characteristics Based on Synchrotron X-ray Radiography

Cited by 11 publications

References 38 publications

Ultrasonic Cavitation Treatment of Metallic Alloys

Ultrasonic Cavitation Treatment of Metallic Alloys

Numerical Modelling of the Ultrasonic Treatment of Aluminium Melts: An Overview of Recent Advances

Ultrasound cavitation induced nucleation in metal solidification: An analytical model and validation by real-time experiments

Contact Info

Product

Resources

About