Nucleation and grain formation of pure Al under Pulsed Magneto-Oscillation treatment

Liang, Dong, Liang, Zhuyuan, Zhai, Qijie, Wang, Gui and St John, David H. (2014) Nucleation and grain formation of pure Al under Pulsed Magneto-Oscillation treatment. Materials Letters, 130 48-50. doi:10.1016/j.matlet.2014.05.058


Author Liang, Dong
Liang, Zhuyuan
Zhai, Qijie
Wang, Gui
St John, David H.
Title Nucleation and grain formation of pure Al under Pulsed Magneto-Oscillation treatment
Journal name Materials Letters   Check publisher's open access policy
ISSN 0167-577X
1873-4979
Publication date 2014-09-01
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.matlet.2014.05.058
Open Access Status
Volume 130
Start page 48
End page 50
Total pages 3
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2015
Language eng
Abstract The grain structure of commercially pure Al can be significantly refined by the Pulsed Magneto-Oscillation (PMO) treatment. When PMO was applied to the melt during solidification, the thermal undercooling increased not only near the mold wall but also in the center of the melt. PMO treatment promoted more vigorous convection of the melt, resulting in a significant decrease in the temperature gradient from the mold wall to the center of the casting compared to the case without PMO treatment. The resulting lower temperature gradient led to a more uniform temperature field in the melt, which in turn favored the survival of the Al grains and allowed them to grow rather than remelt. Consideration of the thermal environment during solidification provides a more complete description of the mechanism of grain refinement of pure metals when PMO is applied.
Keyword Pulsed Magneto-Oscillation
Undercooling
Temperature gradient
Cast
Solidification
Aluminum
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2015 Collection
Official Audit
 
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