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Martensite Lattice Correspondence and Twinning in Uranium Alloys

Published online by Cambridge University Press:  21 February 2011

J.G. Speer  and
D.V. Edmonds
J.G. Speer
Affiliation:
Department of Metallurgy & Science of Materials, University of Oxford, Parks Road, Oxford OX1 3PHEngland
D.V. Edmonds
Affiliation:
Department of Metallurgy & Science of Materials, University of Oxford, Parks Road, Oxford OX1 3PHEngland
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Abstract

A new lattice correspondence has been deduced for the γ→a′ martensite reaction in dilute uranium alloys. The new correspondence involves a lattice deformation with significantly smaller principal strains than those previously considered, although more atomic shuffles are required.

From an analysis of possible transformation twinning modes based on the new correspondence, the further possibility of a deformation twinning mode in these alloys is theoretically predicted. The mode is compound, described by (021)(023) [012] [032], and involves a twinning shear (g = .044) which is smaller than any value previously predicted or observed, although again a larger number of shuffles would be required. The significance of these results is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 21: Symposium GREECE – Phase Transformations in Solids , 1983 , 705
Copyright
Copyright © Materials Research Society 1984

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References

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