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Metals 2019, 9(3), 366;

Optimizing the Conditions of Metal Solidification with Vibration

Faculty of Physics and Engineering, Tomsk State University, Tomsk 634050, Russia
Brunel Centre for Advanced Solidification Technology, Brunel University London, Uxbridge UB8 3PH, UK
Author to whom correspondence should be addressed.
Received: 27 February 2019 / Revised: 18 March 2019 / Accepted: 20 March 2019 / Published: 21 March 2019
(This article belongs to the Special Issue Casting and Forming of Advanced Aluminum Alloys)
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Vibration treatment of solidifying metals results in improvement in the ingot structure. There is a need to study this process not only because of the practical potential of vibration treatment but also due to the lack of understanding the process. An important practical challenge is to find optimal conditions for liquid metal processing. In this paper, the authors consider a solidification process in the particular case of a cylindrical chill mold with vibration as a solution of the Stefan problem. An integral value of mechanical stresses in the melt during solidification is considered as an efficiency criterion of vibration treatment. A dependence of this value on the vibration frequency and amplitude is obtained through solving the Stefan problem numerically. The solution allows one to find the optimal vibration frequency and amplitude. We verified the numerical solution with experimental data obtained upon vibration treatment of aluminum melt under different conditions. The experimentally found optimal conditions for metal processing were similar to those proposed in theory, i.e., a vibration frequency of about 60 Hz and an amplitude of about 0.5 mm. View Full-Text
Keywords: vibration treatment; optimal conditions; solidifying melt; Stefan problem vibration treatment; optimal conditions; solidifying melt; Stefan problem

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Kudryashova, O.; Khmeleva, M.; Danilov, P.; Dammer, V.; Vorozhtsov, A.; Eskin, D. Optimizing the Conditions of Metal Solidification with Vibration. Metals 2019, 9, 366.

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