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Title: Effect of thermal aging on microstructure and microhardness of AL–12SI–4MG alloy containing cerium
Authors: Anasyida, Abu Seman
Abdul Razak, Daud
Mariyam Jameelah, Ghazali
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Keywords: Thermal aging;Microhardness;Dendritic;Spheroidization;Heat treatment;Alloys;Cerium;Alloys -- Effect of temperature on
Issue Date: 1-Dec-2009
Publisher: Universiti Malaysia Perlis
Citation: p.1-5
Series/Report no.: Proceedings of the Malaysian Metallurgical Conference '09 (MMC'09)
Abstract: The effect of thermal aging on microstructure and microhardness of cast Al-12Si-4Mg alloys has been studied. Al–12Si-4Mg alloys with 1 to 5 wt.% cerium addition were prepared using casting technique. Cast alloy was undergo age hardening treatment having sequence of solutionizing, quenching and artificial aging. All the alloys were solutionized at 540 ºC for 4 h followed by water quenching and age hardening at 130 ºC, 150 ºC, 170 ºC, 190 ºC and 210 ºC for 4, 3, 2 and 1 h. Detailed analysis of the microstructures was carried out using Axiotech 1000HD optical microscope. Hardness was measured using Shimadzu Microhardness Tester (HMV-2000). Optical microstructure study of alloys showed the cast dendritic structure is destroyed and the spheroidization of eutectic silicon after the heat treatment. The hardness was the highest after aging at 130 °C and 150 C for 3 h, at 170 °C and 190 °C for 2 h and 210 °C for 1 h.
Description: Organized by School of Materials Engineering & Sustainable Engineering Research Cluster, 1st - 2nd December 2009 at Putra Brasmana Hotel, Kuala Perlis, Perlis.
URI: http://hdl.handle.net/123456789/7526
Appears in Collections:Conference Papers

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