Effects of outside energetic treatment of metal melts on the process of crystallization, analyzed by AE-method and melting plateau stabilization

Прохоренко, С. В.; Prokhorenko, V. Ya.; Mudry, S.; Halczak, W.; Panas, Andrzej; Lutsyshyn, T.; Wojturski, J.

doi:10.1016/j.jmatprotec.2005.04.037

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…The decrease in the size and fraction of the intermetallic compound can be explained by the increase in melt homogeneity and grain refining of the microstructure. 24,25) The collapse of cavitation bubbles and generation of shock waves at or near the interface will cause disruption and mixing, resulting in the formation of a very uniform melt, and this causes the uniform and tiny structure of the eutectic phase due to the variation of the solidification temperature and time. Moreover, the refined primary solid phase also contributed to the decreasing fraction and size of the eutectic phase.…”

Section: Resultsmentioning

confidence: 99%

Effect of sonotrode material on grain refining of Mg–3Al and Mg–9Al alloys by ultrasonic melt treatment

Youn

Lee

Kim

et al. 2016

Jpn. J. Appl. Phys.

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The new process, nucleation enhanced ultrasonic melt treatment (NEUMT), was proposed to increase the refining efficiency through heterogeneous nucleation by using the sonotrode which has been only concerned with the medium to transfer the ultrasonic energy. In the processing, the metal atoms and/or clusters eroded from the sonotrode were supplied and were simultaneously mixed uniformly into the melt by the ultrasound. These particles act as potential nuclei and refine the structure. The process was applied to assess grain refinement of Mg alloys, especially Mg–3Al and Mg–9Al. The refining efficiency was affected by the sonotrode material, and Ti was very effective in this process by the formation of proper intermetallic compound in the Mg alloy melt. The intermetallic compound was searched by the calculation of plane disregistry of the crystallographic orientation, and Al3Ti was suggested to be the heterogeneous nuclei.

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Section: Resultsmentioning

confidence: 99%

Effect of sonotrode material on grain refining of Mg–3Al and Mg–9Al alloys by ultrasonic melt treatment

Youn

Lee

Kim

et al. 2016

Jpn. J. Appl. Phys.

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show abstract

“…The effect of thermal history upon the shape of the eutectic melting curve and melting curve's derivative characteristics (that is, melting temperature and its repeatability) is discussed in a number of publications (e.g. [14][15][16]); all stress the necessity of studying the problem at a more detailed physical level. 3.…”

Section: Discussionmentioning

confidence: 99%

Melting points of gallium and of binary eutectics with gallium realized in small cells

et al. 2008

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Melting/freezing curves are studied for the single-component Ga and bimetallic eutectic alloys Ga–In, Ga–Sn, Ga–Zn and Ga–Al in small-size cells. These phase-transition studies were conducted at VNIIOFI and SDL in order to design small-size fixed-point devices for metrological monitoring of temperature sensors on autonomous platforms. Our prime objective is to develop technology to improve the long-term performance of in-flight blackbody calibration sources of space-borne radiometers. The repeatability of the melting temperature of Ga and the eutectic melting temperatures of Ga–In, Ga–Sn and Ga–Zn fixed points were studied. Our results show that small cells containing Ga and some Ga-based eutectic alloys can be used as melting fixed-point standards.

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“…At the same time, this issue obviously requires further, more detailed studies; the effect of thermal history on the eutectic melting plateau's shape and repeatability was reported in a number of publications (e.g., [8][9][10][11][12]) whose authors suggested that investigations of this crucial problem should be continued by means of different methods and instruments. In [12], the heating curves of a Ga-Sn alloy with 12 mass% Sn were obtained (Fig.…”

Section: Effect Of Thermal History On the Eutectic Melting Plateaumentioning

confidence: 99%

“…It is the interaction among the nano-size clusters in the liquid phase that mostly determines the character of the starting structure of the eutectic fixed point obtained under freezing at the preliminary stage [11].…”

Section: Effect Of Thermal History On the Eutectic Melting Plateaumentioning

confidence: 99%

Development of Gallium and Gallium-Based Small-Size Eutectic Melting Fixed Points for Calibration Procedures on Autonomous Platforms

et al. 2008

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Melting/freezing temperature curves are studied for the single-component Ga and bimetallic eutectic alloys Ga-In, Ga-Sn, Ga-Zn, and Ga-Al in small-size cells. These phase-transition studies were conducted at VNIIOFI in order to design small-size fixed-point devices for metrological monitoring of temperature sensors on autonomous (e.g., space borne) platforms. The results show that Ga and some Ga-based eutectic alloys in small cells can be used as melting fixed points. The repeatability of melting temperatures of Ga, Ga-In, Ga-Sn, and Ga-Zn fixed points is studied. The effects of the concentration of the second element of Ga-based eutectic alloys and the thermal history on the melting plateau's shape and the melting temperature are studied.

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Effects of outside energetic treatment of metal melts on the process of crystallization, analyzed by AE-method and melting plateau stabilization

Cited by 4 publications

References 3 publications

Effect of sonotrode material on grain refining of Mg–3Al and Mg–9Al alloys by ultrasonic melt treatment

Effect of sonotrode material on grain refining of Mg–3Al and Mg–9Al alloys by ultrasonic melt treatment

Melting points of gallium and of binary eutectics with gallium realized in small cells

Development of Gallium and Gallium-Based Small-Size Eutectic Melting Fixed Points for Calibration Procedures on Autonomous Platforms

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