Effect of Granule Size in Semi-Solid Slurry on Rheo-Extrusion of A7075 Aluminum Alloy

Yasuhiro Uetani; Ryotaro Nagata; Hidetoshi Takagi; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/MSF.561-565.291

Paper Titles

HREM and HAADF Studies of Precipitates in the Mg-Y-Nd Alloy System
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Microstructural Characterization and Temperature Analysis in Friction Stir Welding of A383/5052 Dissimilar Aluminum Alloys
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First-Principles Calculation of Interaction Energies between Solutes and/or Vacancies for Predicting Atomistic Behaviors of Microalloying Elements in Aluminum Alloys
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Influences of Rolling Conditions on Texture and Mechanical Properties of AZ31 Magnesium Alloy Processed by Differential Speed Rolling
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Effect of Granule Size in Semi-Solid Slurry on Rheo-Extrusion of A7075 Aluminum Alloy
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Influences of Hydrogenation on Microstructure and Microhardness of Ti6Al4V Alloy
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Phase Analysis for Mg-Zn-Y Magnesium Alloys by Using Extraction Technology
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HRTEM Observation of Precipitates at Early Stage of Aging in Mg-Gd-Zr Alloy
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HRTEM Observation of the Age Hardening Precipitates in Mg-Gd-Sc Alloy
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HomeMaterials Science ForumMaterials Science Forum Vols. 561-565Effect of Granule Size in Semi-Solid Slurry on...

Effect of Granule Size in Semi-Solid Slurry on Rheo-Extrusion of A7075 Aluminum Alloy

Abstract:

Rheo-extrusions of A7075 aluminum alloy were carried out utilizing semi-solid slurries with different solid granule sizes, which were made by a simple method combined a thin upright tube with a water-cooled tube. Every structure of slurries was granular and average solid granule sizes could be controlled by 0.05 to 0.11mm. These slurries were extruded to round bars at extrusion ratio of 36 and press ram speed of 10mm/s mainly, just after cooling to 833K ( fs > 0.9 ). All of the slurries could easily be extruded to bars with smooth surfaces at much low extrusion forces than those of hot-extrusions. Tensile strength of rheo-extruded bars after solution treatment increased with decreasing of the solid granule size. Peak hardness level at T6 condition equivalent to that of hot-extrusion could be obtained at the finest solid granule size.

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Periodical:

Materials Science Forum (Volumes 561-565)

Pages:

291-294

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.561-565.291

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Online since:

October 2007

Authors:

Yasuhiro Uetani, Ryotaro Nagata, Hidetoshi Takagi, Kenji Matsuda, Susumu Ikeno

Keywords:

AA7075, Age Hardenability, Cooling Tube, Extrudability, Rheo-Extrusion, Semi-Solid Slurry, Solid Granule Size, Tensile Properties, Upright Tube

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References

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