Chen, H., Chen, Z., Lai, Z. et al. (2 more authors) (2019) The effects of ultrasonic treatments on the microstructure and mechanical properties of SAC0307 solder. Journal of Materials Processing Technology, 266. pp. 619-626. ISSN 0924-0136
Abstract
The microstructures and physical properties of SAC0307 lead-free solder formed by an ultrasound-assisted semi-solid casting process were analyzed. The damages to a thin aluminium foil placed in the alloy melt at 226∘C showed strong effects of acoustic streaming. Significant erosion due to cavitation was found for powers higher than 450W. Numerical simulations of a collapsing cavitation bubble obtained the highest peak pressure and temperature when the ultrasonic power was around 550W. When the ultrasonic power was between 500W and 600W, sub-grains were observed and the crystal grains became equiaxed with the smallest average grain size of about 140μm. The highest tensile strength found in this range was about 36.6 MPa. The density was 7.35g/cm3. The elongation at break was about 60%, which was 40% higher than the value obtained by traditional casting techniques.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Elsevier. This is an author produced version of a paper subsequently published in Journal of Materials Processing Technology. Uploaded in accordance with the publisher's self-archiving policy. Article available under the terms of the CC-BY-NC-ND licence (https://creativecommons.org/licenses/by-nc-nd/4.0/). |
Keywords: | Lead-free solder; Metal casting; ultrasonic treatments; cavitation; bubble dynamics |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > School of Mathematics and Statistics (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 27 Nov 2018 11:51 |
Last Modified: | 02 Nov 2021 13:26 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.jmatprotec.2018.11.025 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:139230 |