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Atamanenko, T.V.; Eskin, D.G.; Zhang, L.; Katgerman, L.
Publisher: Springer Nature
Journal: Metallurgical and Materials Transactions A
Languages: English
Types: Article
Subjects: Condensed Matter Physics, Solidification, Metals and Alloys, Grain refinement, Aluminium alloys, Mechanics of Materials, Ultrasonic melt treatment
Copyright @ 2010 The Authors. This paper was published in Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 41(8), 2056 - 2066, and is made available as an electronic reprint with the permission of ASM International. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplications of any material in this paper for a fee or for commercial purposes, or modification of the content of this paper are prohibited. It is well known that ultrasonic melt treatment (UST) promotes grain refinement in aluminum alloys. Cavitation-aided grain refinement has been studied for many years; however, it is still not being applied commercially. The current article summarizes the results of experimental work performed on various alloying systems at different stages of solidification. The influence of UST parameters and solidification conditions on the final grain structure is analyzed. It was found that small additions of zirconium and titanium can significantly increase the efficiency of UST, under the stipulation that grain refinement is performed in the temperature range of primary solidification of Al Zr. The possible mechanisms for this effect are discussed.
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