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Nanocomposite microstructure in a melt spun Al-Cu-Zr alloy

Srinivasan, D and Chattopadhyay, K (1997) Nanocomposite microstructure in a melt spun Al-Cu-Zr alloy. In: Materials Science Forum, 243 . pp. 251-256.

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Abstract

Rapid solidification of a ternary Al-Cu-Zr alloy results in a nanocomposite microstructure. In this study, melt spinning a Al82Cu15Zr3 alloy has resulted in the combined occurrence of, (a) 0.5 mu m sized grains of Al solid solution and (b) fine grains (10-20 nm) of intermetallic Al2Cu (theta) and alpha-Al, along side each other. The larger alpha-Al grains contain nanometric GP zones, with the Zr addition resulting in a grain refinement. In the other type of microstructure Zr promotes simultaneous nucleation of nanosized grains of the two equilibrium phases, Al2Cu and alpha-Al. Both these lead to a very high hardness of similar to 540 VHN for this alloy and can be used as a candidate for a high strength alloy with good ductility at a low strain rate.

Item Type: Editorials/Short Communications
Additional Information: Copyright of this article belongs to Trans Tech Publications Inc.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 04 Aug 2011 06:51
Last Modified: 04 Aug 2011 06:51
URI: http://eprints.iisc.ernet.in/id/eprint/38316

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