Age hardening and Thermomechanical Treatment of Stircast Iron Powder Reinforced Al Alloy Metal Matrix Composites

Sharma , S S and Jagannath, K and Bhat, Chandrashekhar and Prabhu, P R (2012) Age hardening and Thermomechanical Treatment of Stircast Iron Powder Reinforced Al Alloy Metal Matrix Composites. In: International Conference on Mechanical, Production and Materials Engineering (ICMPME'2012), June 16-17 , Bangkok.

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Abstract

Metal matrix composites (MMC’s) consist of a metallic matrix combined with dispersed particulate phases as reinforcement. MMC’s with uniformly dispersed iron particles in a ductile matrix may be used for automotive, aerospace and structural applications. The semi-solid stir casting method is employed for composite preparation. Al-Zn-Cu alloy matrix is precipitation hardenable and therefore suitable for age hardening treatment and thermomechanical treatment (TMT). Cold deformation increases lattice defects due to strain hardening, which in turn improves the properties of solution treated alloy. In view of this, six different Al-Zn-Cu alloy composites reinforced with Iron powder (1 wt. % to 5 wt. %) are prepared by conventional semisolid stir casting process. The solution treated specimens are conventionally and thermomechanically treated. The hardness, strength, ductility and wear resistance are analyzed and compared with Iron free Al-Zn-Cu alloys. Higher peak hardness and lesser aging time are the characteristics of hermomechanically treated samples.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Aging, Reinforcement, Precipitation, Stircast, Thermomechanical
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 13 Mar 2013 09:54
Last Modified: 13 Mar 2013 09:54
URI: http://eprints.manipal.edu/id/eprint/79011

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