Study of Semisolid and ECAP Processes on Al-Fe-Si Alloy - Microstructure and Kinetic Grain Growth

Abstract:

ECAP (Equal Channel Angular Pressing) is one of the useful methods of Severe Plastic Deformation (SPD) to reach ultrafine grain size. ECAP was carried out on Al-Fe-Si alloy. All grains stretched along the ECAP direction. Samples were ECAPed for one pass into an ECAP mold with two equal channels (1 cm × 1 cm) with 90o between them. After ECAP, specimens were heat treated (semisolided) for different times and temperatures for achieving globular grains. Optical microscopy has been used to evaluate the microstructure. By ECAP and semisolid processes, the structure becomes fine and globular. The kinetic grain growth has been studied for this alloy by the calculation of the D = Ktn equation and log(D)-log(t) curves.

• Periodical: Defect and Diffusion Forum (Volumes 312-315)
• Pages: 166-171
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.312-315.166
• Online since: April 2011
• Authors: D. Azimi-Yancheshmeh, M. Aghaie-Khafri
• Keywords: Al-Fe-Si Alloy, Equal-Channel Angular Pressing (ECAP), Fine, Globular, Grain Size, Semi-Solid

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