Cold Deformation Effect on the Conventionally Aged Stircast Iron Powder Reinforced Aluminum Alloy Metal Matrix Composites

Sharma , S S and Jagannath, K and Bhat, Chandrashekhar and Prabhu, P R (2012) Cold Deformation Effect on the Conventionally Aged Stircast Iron Powder Reinforced Aluminum Alloy Metal Matrix Composites. International Journal of Research in Engineering and Technology, 1 (3). ISSN 2277 – 4378

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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 with (conventional age hardening) or without cold deformation [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 thermomechanically treated samples.

Item Type: Article
Additional Information: Copyright © 2011. All Rights Reserved. Planetary Scientific Research Center (PSRC)
Uncontrolled Keywords: aging, reinforcement, precipitation, stircast, thermomechanical
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 26 Feb 2013 10:48
Last Modified: 26 Feb 2013 10:48
URI: http://eprints.manipal.edu/id/eprint/78741

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