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Surface depletion of lithium in medium-strength aeronautical AI-Li alloys during heat treatment

Udyavar, Mradulla S and Dwarakadasa, ES (1992) Surface depletion of lithium in medium-strength aeronautical AI-Li alloys during heat treatment. In: Journal of Materials Science Letters, 11 (8). 490 -492.

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Abstract

AI alloys containing up to 2.8% lithium are being developed as a lighter substitute for currently used high-strength A1 alloys. The higher strength-to- weight ratio and higher elastic modulus of the new A1-Li alloys have led to their application in the aircraft industries. Each 1% addition of lithium to an A1 alloy decreases the density by about 3% and increases the elastic modulus (stiffness) by 6% [1]. In practice up to 4 wt % Li can be added. The direct benefit of A1-Li alloys includes a potential 25% increase in specific strength and specific stiffncss with a consequent overall weight reduction of aircraft.

Item Type: Journal Article
Additional Information: copyright of this article belongs to Springer Verlag.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 16 Aug 2006
Last Modified: 19 Sep 2010 04:30
URI: http://eprints.iisc.ernet.in/id/eprint/8025

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