Next Article in Journal
Modelling and Microstructural Aspects of Ultra-Thin Sheet Metal Bundle Cutting
Next Article in Special Issue
Microstructural Evaluation and Corrosion Resistance of Semisolid Cast A356 Alloy Processed by Equal Channel Angular Pressing
Previous Article in Journal
Production of Ultrafine Grained Hardmetals by Electrical Resistance Sintering
Previous Article in Special Issue
Superplastic Behavioral Characteristics of Fine-Grained 5A70 Aluminum Alloy
Article Menu
Issue 2 (February) cover image

Export Article

Open AccessArticle
Metals 2019, 9(2), 161; https://doi.org/10.3390/met9020161

Joint Effect of Ultrasonic Vibrations and Solid Metal Addition on the Grain Refinement of an Aluminium Alloy

1,2,*
and
1
1
BCAST, Brunel University London, Uxbridge UB8 3PH, UK
2
Faculty of Physics and Engineering, Tomsk State University, Tomsk 634050, Russia
*
Author to whom correspondence should be addressed.
Received: 21 December 2018 / Revised: 23 January 2019 / Accepted: 27 January 2019 / Published: 1 February 2019
(This article belongs to the Special Issue Casting and Forming of Advanced Aluminum Alloys)
Full-Text   |   PDF [6547 KB, uploaded 1 February 2019]   |  

Abstract

It is well known that it takes some time for the solid phase to completely dissolve upon melting, especially inside the defects of insoluble particles, e.g. oxides. Until then the oxides remain active solidification substrates in the case of subsequent solidification. It is also known that ultrasonic melt treatment causes grain refinement through activation and dispersion of solidification substrates (one of the mechanisms) and also accelerates the dissolution of solid metal in the melt. In this study we combine these effects and demonstrate that the introduction of an alloy rod into the matrix melt of the same composition results in significant grain refinement, this effect is increased by the ultrasonic vibration of the rod. The achieved grain size is comparable to that obtained by a standard Al–Ti–B grain refiner. All samples were cast using a standard TP-1 mould to enable correct comparison. The effects of the temperature range of the rod introduction as well as the application of ultrasonic vibrations are discussed. View Full-Text
Keywords: aluminium alloy; grain refinement; ultrasonic processing; solidification; nucleation; dissolution aluminium alloy; grain refinement; ultrasonic processing; solidification; nucleation; dissolution
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Eskin, D.; Wang, F. Joint Effect of Ultrasonic Vibrations and Solid Metal Addition on the Grain Refinement of an Aluminium Alloy. Metals 2019, 9, 161.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top