Aging Behavior of Al-Cu Alloys Produced by Melt Extrusion Process

Abstract:

Melt extrusion is a new fabrication process with the characteristics of both casting and extrusion. In this process, a metallic melt which is poured and solidified up to semisolid state in the container can be directly extruded through the die exit to form a product of bar shape without other intermediate processes. The aging behavior of Al-Cu alloys in the semisolid state was investigated. And the microstructure and mechanical properties of the melt extruded Al-Cu alloy bar were measured and its characteristics are compared with those of a hot extruded Al-Cu alloy bar. Al-Cu alloys were successfully extruded after squeezing out of liquid during melt extrusion with smaller force compared to the solid extrusion. Al-Cu alloys bar with the mean grain size of up to 200 μm was fabricated by melt extrusion process. And the mechanical properties of the melt extruded Al-Cu alloy bar were improved after the T6 treatment.

• Periodical: Solid State Phenomena (Volumes 116-117)
• Pages: 550-553
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.116-117.550
• Online since: October 2006
• Authors: Byoung Soo Lee, Dae Heon Joo, Hoon Cho, Hyung Ho Jo, Myung Ho Kim
• Keywords: Al-Cu Alloys, Melt Extrusion, Segregation, Semi-Solid Material

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