Title

In situ characterization of lattice structure evolution during phase transformation of Zr-2.5Nb

RIS ID

38486

Publication Details

Yan, K., Carr, D. G., Kabra, S., Reid, M., Studer, A., Harrison, R. P., Dippenaar, R. & Liss, K. (2011). In situ characterization of lattice structure evolution during phase transformation of Zr-2.5Nb. Advanced Engineering Materials, 13 (9), 882-886.

Abstract

The α–β phase transformation behavior of Zr-2.5Nb (in mass%) has been characterized in real time during an in situ neutron diffraction experiment. The Zr-2.5Nb material in the current study consists, at room temperature, of α-Zr phase (hcp) and two β phases (bcc), a Nb rich β-Nb phase and retained, Zr rich, β-Zr(Nb) phase. It is suggested that this is related to a quench off the equilibrium solubility of Nb atoms in the Zr bcc unit cells. Vegard's law combined with thermal expansion is applied to calculate the composition of the β-phase, which is compared with the phase diagram, revealing the system's kinetic behavior for approaching equilibrium.

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/adem.201000350