Microstructure and rheological properties of semi-solid 7075 slurries using SEED rheocasting process

Bolouri, Amir; Zhao, Qin Fu; C�t�, Pascal; Chen, X. Grant

Abstract

© 2016 Trans Tech Publications, Switzerland. The SEED rheocasting process was used to produce semisolid slurries of high strength 7075 aluminum wrought alloys. The effects of the SEED processing parameters on the microstructure of semisolid slurries were studied. The impact of grain refinement on the grain morphology and size was investigated. The rheological properties of semisolid 7075 alloys were characterized at different solid fractions using a parallel plate compression viscometer. Results indicated that the grain refinement could greatly improve the globularity of α-Al grains and rheoformability. The relationships between viscosity and shear rate at different solid fractions in the transient state for both unrefined and refined semisolid slurries were evaluated and discussed.

• Presentation Conference Type: Conference Paper (published)
• Conference Name: Solid State Phenomena
• Acceptance Date: Sep 13, 2016
• Publication Date: Jan 1, 2016
• Deposit Date: Oct 3, 2016
• Publicly Available Date: Oct 3, 2016
• Journal: Solid State Phenomena
• Print ISSN: 1012-0394
• Electronic ISSN: 1662-9779
• Publisher: Trans Tech Publications
• Peer Reviewed: Peer Reviewed
• Volume: 256
• Pages: 288-293
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.256.288
• Keywords: aluminum alloys, semisolid processing, rheology
• Public URL: https://uwe-repository.worktribe.com/output/908355
• Publisher URL: http://dx.doi.org/10.4028/www.scientific.net/SSP.256.288
• Additional Information: Additional Information : This is the accepted version of an article originally published in Solid State Phenomena. The final version is available online at http://dx.doi.org/10.4028/www.scientific.net/SSP.256.288
• Contract Date: Oct 3, 2016