Enhancement in Hardness and Influence of Artificial Aging on Stir Cast Al6061-B4C and Al6061-SiC Composites

Gowri Shankar, M C and Shettar, Manjunath and Sharma, S S and Kini, Achutha U and Jayashree, P K (2018) Enhancement in Hardness and Influence of Artificial Aging on Stir Cast Al6061-B4C and Al6061-SiC Composites. Materials Today: Proceedings, 5 (1P3). pp. 2435-2443. ISSN 2214-7853

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Abstract

Present investigation focusses on individual effect of B4C and SiC on the improvement in hardness with an average size of 35- 40μm and various weight percentage of (2, 4 and 6) Al6061 alloy composite. Composites are produced by stir casting process. The precipitation hardening effect at 100, 150 and 200ᴼC on the mechanical properties was also investigated. Optical micrographs and Brinel hardness number have been discussed. Transmission electron microscope shows precipitation of finer inter-metallic in both Al6061 alloy and its composites. Increase in percentage of both B4C and SiC reinforcement from 2-6% wt. and artificially aged at 100°C shows enhancement in hardness by 150-175% due to the precipitation of intermetallic phases of alloying elements. Al6061-B4C composites show improvement in hardness as compared to Al6061-SiC composites

Item Type: Article
Uncontrolled Keywords: Al6061 alloy; Aging, Composite; Micro structure; Stir casting: Intermetallics:
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 02 Mar 2018 09:30
Last Modified: 02 Mar 2018 09:30
URI: http://eprints.manipal.edu/id/eprint/150667

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