Influence of Ageing Heat Treatment on Microstructure and Mechanical Properties of a Secondary Rheocast AlSi9Cu3(Fe) Alloy

Abstract:

The effects of different process parameters (temperature and time) during the ageing treatment on the microstructure and the mechanical properties of a secondary rheocast AlSi9Cu3(Fe) alloy have been examined. Optical microscope investigations have been performed to qualitatively study the microstructure of the as-rheocast and thermal treated alloys. Transmission electron microscopy technique and selected area electron diffraction analyses have been used to characterize the hardening phases precipitated in the Al-matrix during the different ageing stages. The evolution of mechanical properties of the Al matrix has been monitored by micro-hardness testing.

• Periodical: Materials Science Forum (Volumes 828-829)
• Pages: 212-218
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.828-829.212
• Online since: August 2015
• Authors: Stefano Capuzzi*, Giulio Timelli, Alberto Fabrizi, Franco Bonollo
• Keywords: Ageing Hardening, Microstructure, Secondary Aluminium Alloy, Semi-Solid, TEM

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