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Metals 2016, 6(2), 32; doi:10.3390/met6020032

Microstructure and High Temperature Deformation of Extruded Al-12Si-3Cu-Based Alloy

Division of Materials Science and Engineering, Inha University, Incheon 22207, Korea
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Author to whom correspondence should be addressed.
Academic Editor: Hugo F. Lopez
Received: 3 November 2015 / Revised: 13 January 2016 / Accepted: 25 January 2016 / Published: 2 February 2016
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Abstract

The high temperature deformation behavior of commercial Al-12Si-3Cu-2Ni-1Mg alloy (DM104™) which was fabricated by casting and subsequent hot extrusion was evaluated by compressive tests over the temperature range of 250–470 °C and strain rate range of 0.001–1/s. The extruded alloy had equiaxed grains, spherical Si particles and fine intermetallic phases, such as δ(Al3NiCu) and Q(Al5Cu2Mg3Si6). The true stress-true strain curves from the compressive tests exhibited steady-state flow after reaching the peak stress. A close relationship between the steady-state stress and a constitutive equation for high temperature deformation was observed. Fine equiaxed grains and a dislocation structure within the equiaxed grains were observed in the deformed specimens, suggesting the occurrence of dynamic recrystallization during high temperature deformation. View Full-Text
Keywords: piston alloy; extrusion; compressive test; plastic deformation; high temperature piston alloy; extrusion; compressive test; plastic deformation; high temperature
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Yu, S.-B.; Kim, M.-S. Microstructure and High Temperature Deformation of Extruded Al-12Si-3Cu-Based Alloy. Metals 2016, 6, 32.

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