Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/66639
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Microstructure and rheological behavior of grain refined and modified semi-solid A356 Al–Si slurries |
Author: | Nafisi, S. Lashkari, O. Ghomashchi, R. Ajersch, F. Charette, A. |
Citation: | Acta Materialia, 2006; 54(13):3503-3511 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2006 |
ISSN: | 1359-6454 1873-2453 |
Statement of Responsibility: | Shahrooz Nafisi, Omid Lashkari, Reza Ghomashchi, Frank Ajersch, Andre Charette |
Abstract: | A comprehensive study was carried out to establish the effect of melt treatment using Ti-B grain refiner and Sr modifier additions on the microstructural evolution and rheological properties of A356 aluminum alloy in the semisolid state. Rheocast billets of 75 mm in diameter and ∼140 mm in length, prepared by the SEED process, were deformed and several parameters were investigated to characterize the flow behavior of the billets in a compression test. Strain-time graphs were used to calculate the viscosity and liquid segregation was monitored to identify the optimum conditions for melt treatment. It is shown that non-treated alloy has the highest apparent viscosity. Refined semisolid billets have smaller particle size and more globularity of primary α-Al particles and as a result deform and flow more easily. It is postulated that modifier addition reduces the liquid surface tension and leads to improved deformability. © 2006 Acta Materialia Inc. |
Keywords: | Semisolid SEED process Rheological properties Viscosity Grain refiner Modifier |
Rights: | Copyright © 2006 Acta Materialia Inc. |
DOI: | 10.1016/j.actamat.2006.03.016 |
Published version: | http://dx.doi.org/10.1016/j.actamat.2006.03.016 |
Appears in Collections: | Aurora harvest 5 Materials Research Group publications Mechanical Engineering publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.