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

Gowri Shankar, M C and Sharma, S S and Kini, Achutha U (2016) Enhancement in Hardness and Influence of Artificial Aging on Stir Cast Al6061-B4C and Al6061-SiC Composites. In: International Conference on Advanced Materials and Applications (ICAMA 2016), 15/06/2016, BMSCE, BANGLORE.

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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 effect of artificial aging treatment with different aging temperatures of 100, 150 and 200ᴼC on the mechanical properties was also investigated. Optical micrographs and brinell hardness number have been discussed. Transmission electron microscope shows precipitation of finer intermetallics in both Al6061 alloy and its composites. Increase in percentage of both B4C and SiC reinforcement from 2-6% wt. and artificially aged at lower temperature shows improvement in hardness by 150-175% due to the precipitation of secondary solute rich phase of alloying elements. Al6061-B4C composites show improvement in hardness as compared to Al6061-SiC composites

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Al6061 alloy; Aging, Composite; Micro structure; Stir casting: Intermetallics:
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 29 Jun 2016 09:52
Last Modified: 29 Jun 2016 09:52
URI: http://eprints.manipal.edu/id/eprint/146427

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