Rheo-Extrusion of Hypereutectic Al-14.8Si-4.5Cu-1.1Mg Alloy

Nanako Mori; Yasuhiro Uetani; Masayoshi Dohi; Kenji Matsuda; Susumu Ikeno

doi:10.4028/www.scientific.net/AMR.409.57

Paper Titles

Effect of Grain Refinement on Residual Strain and Hot Tearing in B206 Aluminum Alloy
p.35

Microstructure Evolution in an Al-Cu-Mg-Ag Alloy during ECAP at 300°C
p.41

Analysis on Behavior of Hydrogen in Ion-Plated Pure Aluminum
p.47

The Ca-Rich Corner of the Al-Ca-Zn System
p.51

Rheo-Extrusion of Hypereutectic Al-14.8Si-4.5Cu-1.1Mg Alloy
p.57

Aging Behavior of Al-Mg-Ge Alloys with Different Mg₂Ge Contents
p.63

The Crystal Structure of the β’-Phase Including Ag in Al-Mg-Si-Ag Alloy
p.67

Investigation of the Substructure Evolution within Grains of Different Orientations during Recrystallization in a Commercial Al Alloy
p.71

Microstructural Control of a Zn-Al Eutectoid Alloy by Hot-Rolling
p.77

HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 409Rheo-Extrusion of Hypereutectic...

Rheo-Extrusion of Hypereutectic Al-14.8Si-4.5Cu-1.1Mg Alloy

Abstract:

Rheo-extrusion of hypereutectic Al-14.8%Si-4.5%Cu-1.1%Mg (in mass%) alloy which is considerably difficult to hot-extrude was tried using semi-solid slurry with fine solid granules and almost finely dispersed primary Si particles, made by a newly developed rotor process. Trials of rheo-extrusion at the constant extrusion ratio of 36 using this semi-solid slurry were carried out at the different conditions of the extrusion temperature and the ram speeds ranging from 520 to 560oC and from 5 to 20mm/s, respectively. Under the all rheo-extrusion conditions, this semi-solid slurry could easily be rheo-extruded to the round bars of 6mm diameter with sound surface at much lower extrusion force than that of hot-extrusion at very low extrusion ratio. In addition, the characteristic age-hardening behavior which is thought to be essential for the rheo-extrusion process has been found out, namely the peak hardness values of aged bars rheo-extruded at 520 and 540oC were considerably higher, 30HV at maximum, than that of a gravity casting.

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Periodical:

Advanced Materials Research (Volume 409)

Pages:

57-62

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.409.57

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Online since:

November 2011

Authors:

Nanako Mori, Yasuhiro Uetani, Masayoshi Dohi, Kenji Matsuda, Susumu Ikeno

Keywords:

Age-Hardening, Hypereutectic Al-Si-Cu-Mg Alloy, Rheo-Extrudability, Rheo-Extrusion, Semi-Solid Extrusion, Semi-Solid Slurry, Tensile Properties

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