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Design of Experiments for the Optimization the Process Parameters of Thixotropic Aluminum Alloy
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Phase Segregation Susceptibility of ZA27 Alloy at Different Shear Rates
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Phase Segregation Susceptibility of ZA27 Alloy at Different Shear Rates

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Abstract:

Back extrusion technique was employed to characterize phase segregation tendency of mechanically stirred ZA27 alloy at different deformation rates. Variation of segregation intensity with ram diameter was found to follow opposite trends at low and high ram speeds. At sufficiently high ram speeds, small rams are of better performance in minimizing segregation whereas at low ram speeds, large rams result in less pronounced segregation. In addition, increasing ram speed invariably decreases segregation degree. Back extrusion at very high shear rates provided via a Drop Extruder Apparatus capable of displacing ram at speeds in excess of 1m/s results in production of very homogeneous products in terms of solid fraction as well as size distribution of globules.

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Periodical:

Solid State Phenomena (Volumes 116-117)

Pages:

225-230

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.116-117.225

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Online since:

October 2006

Authors:

Javad Mola, Hossein Aashuri, B. Shalchi Amirkhiz

Keywords:

Back Extrusion, Phase Segregation, Semi-Solid Processing, ZA27 Alloy

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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