Plastic Deformation of Zr-Based Alloys at Temperatures of Phase Transformations

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Deformation behavior of Zr-Nb alloys under uniaxial compression, accompanied by phase transformations, is considered by the example of Zr-1%Nb and Zr-2.5%Nb alloys. Model samples were deformed at temperatures of β- and (α+β)-regions of the phase diagram Zr-Nb. Mechanisms, responsible for plastic deformation of alloys by different temperature-rate regimes, were determined on the basis of textures, arising in deformed samples. Among these mechanisms there are crystallographic slip in grains of β-Zr and α-Zr as well as mutual displacements of crystallites along interphase boundaries. The latter mechanism sharply intensifies under conditions of α↔β phase transformations and lies in the basis of superplasticity. An input of each mechanism into plastic deformation of material depends on the temperature-rate regime of compression and determines its anisotropy.

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Periodical:

Edited by:

P. B. Prangnell and P. S. Bate

Pages:

637-642

Citation:

M. Isaenkova et al., "Plastic Deformation of Zr-Based Alloys at Temperatures of Phase Transformations", Materials Science Forum, Vol. 550, pp. 637-642, 2007

Online since:

July 2007

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$38.00

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[2] G. Wassermann und J. Grewen, Texturen metallischer Werkstoffe (Springer-Verlag, Berlin / Heidelberg, 1962).

DOI: https://doi.org/10.1007/978-3-662-13128-2

[3] R.A. Holt and S.A. Aldridge J. Nucl. Mat. Vol. 135 (1985), p.246.

[4] E. Tenckhoff: Deformation Mechanisms, Texture and Anisotropy in Zirconium and Zircaloy, ASTM, STP 966 (Philadelphia, PA, 1988).

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