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Low Density Titanium Alloys by Non-Equilibrium Processing.

Published online by Cambridge University Press:  15 February 2011

D.M.J. Wilkes ,
P.S. Goodwin ,
C.M. Ward-Close ,
K. Bagnall  and
J. Steeds
D.M.J. Wilkes
Affiliation:
Structural Materials Centre, Defence Research Agency, Farnborough, Hants, GU14 6TD. (UK)
P.S. Goodwin
Affiliation:
Structural Materials Centre, Defence Research Agency, Farnborough, Hants, GU14 6TD. (UK)
C.M. Ward-Close
Affiliation:
Structural Materials Centre, Defence Research Agency, Farnborough, Hants, GU14 6TD. (UK)
K. Bagnall
Affiliation:
Department of Physics, University of Bristol, Tyndall Av, Bristol, BS8 1TL. (UK)
J. Steeds
Affiliation:
Department of Physics, University of Bristol, Tyndall Av, Bristol, BS8 1TL. (UK)
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Abstract

High levels of Mg solid solution in Ti have been achieved by mechanical alloying in a clean atmosphere. The equilibrium solubility of magnesium in titanium is very low and processing of these alloys by conventional routes is not possible due to the high vapour pressure of Mg and alloys of Ti and Mg have only been previously achieved by vapour quenching.

Contamination during milling was avoided by processing under a high purity argon atmosphere in sealed vials. Lattice parameter measurements and SEM observations suggested that complete solid solutions were achieved in alloys up to 24wt% Mg after 48h milling. For one alloy this was confirmed by high resolution TEM which showed extremely fine Ti grains in which Mg was homogeneously distributed with no clustering or precipitation.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 400: Symposium E – Metastable Metal-Based Phases and Microstructures , 1995 , 267
Copyright
Copyright © Materials Research Society 1996

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