Kinetics Of Ultrasonic Degassing Of Aluminum Alloys

Ultrasonic processing was shown to be an efficient means of aluminum melt degassing with benefits of being economical and environment friendly. The fundamental reason for ultrasonic degassing is known to be diffusion of dissolved hydrogen to cavitation bubbles assisted by their pulsation, and their subsequent evacuation from the melt.

Severe regassing was detected by previous experiment on degassing method for aluminium-silicon alloy by injecting argon with rotation. In order to further degas, ultrasonic degassing was adopted. To describe the cavitation bubbles’ movement, traditional Rayleigh-Plesset equation was modified. Classic Rayleigh-Plesset equation is strongly restricted by the applicable condition that the centre ...

N. Alba-Baena, D.G. Eskin, Kinetics of ultrasonic degassing of aluminum alloys. ... Degassing of aluminum alloys using ultrasonic vibrations. Report ORNL/TM-2006/61 (U.S. Department of Energy, 2006) Google Scholar. 28. H. Puga et al., The influence of processing parameters on the ultrasonic degassing of molten AlSi9Cu3 aluminium alloy. Mater. Lett.

Aug 15, 2015 · All things being equal, a higher temperature of an aluminum melt will increase the necessary degassing time. Alloying elements also can have an effect on hydrogen solubility. The effect of alloying elements is characterized by changes in the alloy correction factor, with some common casting alloys show in Table 1.

@article{osti_886703, title = {Degassing of Aluminum Alloys Using Ultrasonic Vibration}, author = {Meek, T. T. and Han, Q. and Xu, H.}, abstractNote = {The research was intended to lead to a better fundamental understanding of the effect of ultrasonic energy on the degassing of liquid metals and to develop practical approaches for the ultrasonic degassing of alloys.

Abstract: Ultrasonic processing is known to be an efficient means of aluminium melt degassing and structure modification with additional benefits of being economical and environment friendly. This paper reports on the kinetics of ultrasonic degassing effect of foundry alloys. Direct measurements of hydrogen concentration in the melt by Foseco Alspek-H probe are used along with the reduced …

Ultrasonic Degassing in Molten Aluminium, Zinc, Magnesium, Brass, Bronze, Copper, Glass and steel Degassing, Grain refinement, micro-alloying up to 1,800 Celsius Ultrasonic degassing & grain refinement of metal melts up to 1,800 ° C, can substantially improve the properties of castings, in particular, their microstructure and mechanical properties.

The research was intended to lead to a better fundamental understanding of the effect of ultrasonic energy on the degassing of liquid metals and to develop practical approaches for the ultrasonic degassing of alloys. The goals of the project described here were to evaluate core principles, establish a quantitative basis for the ultrasonic degassing of aluminum alloy melts, and demonstrate the ...

The team has built two prototypes for aluminium degassing via ultrasonic vibration of the metal: one for high-pressure die casting, and the other for low-pressure die casting and gravity casting. This optimised and versatile scheme, applicable to both continuous and batch processes, produced similar or better mechanical properties and porosity indicators compared to currently available technologies.

Ultrasonic degassing reduces the porosity of the metal achieving thereby a higher material density in the final metal / alloy product. Ultrasonic degasification of aluminum alloys raise the ultimate tensile strength and ductility of the material. Industrial power ultrasound systems count as the best amongst other commercial degassing methods ...

N. Alba-Baena and D. Eskin, “Kinetics of Ultrasonic Degassing or Aluminum Alloys,” in Light Metals 2013, The Minerals, Metals & Materials Society, 2013, pp. 957–962. Google Scholar 11.

Effectively ultrasonic degassing reduces the porosity of the cast increasing both strength and ductility. Results ultrasonic degassing molten aluminium: Improved metal homogenization, grain refinement and mixing of new alloys. Excellent ultrasonic degassing results (defragments and wetted inclusions)

NEW on our Ultrasonic Metallurgy website: Ultrasonic masterclass presentation - Ultrasonic vibrations in metallurgy (or download as pdf). MMM (Multi-frequency Multimode Modulated) ultrasonic technology can be used to enhance the process of ultrasonic degassing of molten aluminium during casting.

Ultrasonic degassing of aluminium alloys: basic studies and practical implementation D Eskin, N Alba-Baena, T Pabel, M da Silva Materials Science and Technology 31 (1), 79-84 , 2015

Ultrasonic Treatment of Light Alloy Melts: Edition 2 - Ebook written by Georgy I. Eskin, Dmitry G. Eskin. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Ultrasonic Treatment of Light Alloy …

Maximum alloy density of 2.67 Kg/dm3 was obtained after 2 minutes of ultrasonic experimenting. Although after a minute the density had reached the value of 2.629 kg/dm3 (about 98.5% of the peak value). The kinetics of ultrasonic degassing shows that the rate of degassing slows down and finally reaches a steady state is reached.

Fundamentals of Aluminium Metallurgy: Recent Advances updates the very successful book Fundamentals of Aluminium Metallurgy. As the technologies related to casting and forming of aluminum components are rapidly improving, with new technologies generating alternative manufacturing methods that improve competitiveness, this book is a timely resource.

@article{osti_1216173, title = {Degassing of Aluminum Alloys Using Ultrasonic Vibrations}, author = {}, abstractNote = {The goal of this research is to understand the effect of ultrasonic energy on the degassing of liquid metals and the development of practical approaches for the ultrasonic degassing of alloys.}, doi = {}, journal = {}, number ...

The research was intended to lead to a better fundamental understanding of the effect of ultrasonic energy on the degassing of liquid metals and to develop practical approaches for the ultrasonic degassing of alloys. The goals of the project described here were to evaluate core principles, establish a quantitative basis for the ultrasonic degassing of aluminum alloy melts, and demonstrate the ...

The goals of the project described here were to evaluate core principles, establish a quantitative basis for the ultrasonic degassing of aluminum alloy melts, and demonstrate the application of ultrsaonic processing during ingot casting and foundry shape casting. DOI: 10.2172/886703;

Aug 15, 2015 · All things being equal, a higher temperature of an aluminum melt will increase the necessary degassing time. Alloying elements also can have an effect on hydrogen solubility. The effect of alloying elements is characterized by changes in the alloy correction factor, with some common casting alloys show in Table 1.

Ultrasonically micro-alloyed molten aluminium. Our novel ultrasonic melt treatment of aluminium melts using a cavitation frequency of 20 kHz can radically improve the microstructure of the final products. However, when combined with micro-alloying, the results are even more dramatic.

An experimental device which combines the vacuum degassing and ultrasonic degassing has been built in Oak Ridge National Laboratory recently. Parametric studies have been carried out to investigate the efficacy of the ultrasonic degassing of molten Aluminum alloy under reduced pressure.

Ultrasonic degassing reduces the porosity of the metal achieving thereby a higher material density in the final metal / alloy product. Ultrasonic degasification of aluminum alloys raise the ultimate tensile strength and ductility of the material. Industrial power ultrasound systems count as the best amongst other commercial degassing methods ...

All aluminum alloys can be made to solidify with a fully equiaxed, fine grain structure through the use of suitable grain-refining additions. The most widely used grain refiners are master alloys of titanium, or of titanium and boron, in aluminum. Aluminum-titanium refiners generally contain from 3 to 10% Ti.

Abstract: Ultrasonic processing is known to be an efficient means of aluminium melt degassing and structure modification with additional benefits of being economical and environment friendly. This paper reports on the kinetics of ultrasonic degassing effect of foundry alloys.

Jul 08, 2015 · Having proved that ultrasound degassing of molten aluminium alloys is cleaner, greener and cheaper than current methods, a team of scientists from Brunel University London working within a ...

Ultrasonic degassing of aluminum rests on the diffusion of dissolved hydrogen to cavitation bubbles assisted by their pulsation and their evacuation from the molten metal [7] [8] [9] . However, the worldwide most employed process for hydrogen removal from molten aluminum is …

Ultrasonic melt processing enjoys the revival of interest in the last 1015 years. Although the main fundamental works as well as lab-scale and pilot-scale demonstrations date back to the 1950-1980s, the ultrasonic melt processing of light metals has not become a major technology. Recently the deficiencies of current technological approaches brought back the interest to ultrasonic treatment for ...

Effectively ultrasonic degassing reduces the porosity of the cast increasing both strength and ductility. Results ultrasonic degassing molten aluminium: Improved metal homogenization, grain refinement and mixing of new alloys. Excellent ultrasonic degassing results (defragments and wetted inclusions)

NEW on our Ultrasonic Metallurgy website: Ultrasonic masterclass presentation - Ultrasonic vibrations in metallurgy (or download as pdf). MMM (Multi-frequency Multimode Modulated) ultrasonic technology can be used to enhance the process of ultrasonic degassing of molten aluminium during casting.

Ultrasonic degassing of aluminium alloys: basic studies and practical implementation D Eskin, N Alba-Baena, T Pabel, M da Silva Materials Science and Technology 31 (1), 79-84 , 2015

View Academics in Ultrasonic Degassing of Aluminium Alloys on Academia.edu.

Mar 11, 2018 · Abstract. The paper presents the possibility of ultrasonic treatment to refine large slabs of 5052 aluminum alloy in direct chill casting. Combined modification with grain refiner rod AlTi5%B1% and exposure of the melt flow to a powerful cavitation effect has been found to decrease consumption of the refiner rod maintaining at the same time structural characteristics and enhanced melt ...

Purification technology of aluminum melt is designed for reducing the hydrogen content in aluminum melt, so as to obtain high quality ingot.

Other than water, the degassing or deaeration is used in a variety of other higher viscosity liquids such as epoxies, silicone oils, motor oils, adhesives, beverages, paints, transformer oils, emulsion, polymers, inks, water-based aqueous solution, foaming liquids, candle waxes, resin aluminum alloy …

Ultrasonic Treatment of Light Alloy Melts: Edition 2 - Ebook written by Georgy I. Eskin, Dmitry G. Eskin. Read this book using Google Play Books app on your PC, android, iOS devices. Download for offline reading, highlight, bookmark or take notes while you read Ultrasonic Treatment of Light Alloy …

Maximum alloy density of 2.67 Kg/dm3 was obtained after 2 minutes of ultrasonic experimenting. Although after a minute the density had reached the value of 2.629 kg/dm3 (about 98.5% of the peak value). The kinetics of ultrasonic degassing shows that the rate of degassing slows down and finally reaches a steady state is reached.