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Licensed Unlicensed Requires Authentication Published by De Gruyter January 8, 2022

Processing map for hot working of hot-rolled Mg-11.5Li-1.5Al-0.15Zr alloy

  • O. Sivakesavam EMAIL logo and Y. V. R. K. Prasad


The hot working characteristics of the Mg-11.5Li-1.5Al-0.15Zr (wt.%) alloy have been studied using hot-compression testing in the temperature range 200– 400 °C and strain rate range 0.001– 100 s –1. On the basis of these data, a processing map for this material has been developed. The map exhibits a single domain with a peak efficiency of 53% occurring at 350 °C and 0.001 s– 1. On the basis of microstructural features, grain size variations and ductility variations, the domain is interpreted to represent dynamic recrystallization (DRX). Unlike in Zr-free alloy which exhibits only superplasticity, the Al3Zr particles in the Zr-containing alloy help in nucleating DRX and in refining the grain size. The material exhibits flow instabilities at temperatures higher than 350 °C and strain rates higher than 10 s– 1.

Dr. O. Sivakesavam Defence Metallurgical Research Laboratory Kanchanbagh (P.O), Hyderabad – 500 058, India Tel.: +91 40 434 5865 Fax: +91 40 434 5865/434 1439/434 0683

  1. One of the authors (O.S.) would like to thank Dr. D. Banerjee, Director, Defence Metallurgical Research Laboratory, Hyderabad, India for permission to publish this paper.


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Received: 2001-11-07
Published Online: 2022-01-08

© 2002 Carl Hanser Verlag, München

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