Criteria of Grain Refinement Induced by Ultrasonic Melt Treatment of Aluminum Alloys Containing Zr and Ti

Atamanenko, T.V.; Eskin, D.G.; Zhang, L.; Katgerman, L.

doi:doi:10.1007/s11661-010-0232-4

Criteria of Grain Refinement Induced by Ultrasonic Melt Treatment of Aluminum Alloys Containing Zr and Ti

Journal article

Authors

T.V. Atamanenko

D.G. Eskin

L. Zhang

L. Katgerman

Department

Materials Science and Engineering

DOI: https://doi.org/doi:10.1007/s11661-010-0232-4

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Source:

METALLURGICAL AND MATERIALS TRANSACTIONS A, VOLUME 41A, August 2010

Faculty

Mechanical, Maritime and Materials Engineering

Department

Materials Science and Engineering

Abstract

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 Al3Zr. The possible mechanisms for this effect are discussed.

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