TY - JOUR
T1 - In situ characterization of lattice structure evolution during phase transformation of Zr-2.5Nb
AU - Yan, Kun
AU - Carr, Dave G.
AU - Kabra, Saurabh
AU - Reid, Mark
AU - Studer, Andrew
AU - Harrison, Robert P.
AU - Dippenaar, Rian
AU - Liss, Klaus Dieter
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/9
Y1 - 2011/9
N2 - 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. In situ neutron diffraction has been used to characterize the phase transformation process of the nuclear structural material Zr-2.5Nb (mass%) while subjected to heating and cooling cycles. The shift of diffraction peaks, as shown in the image, has been evaluated by Vegard's law to track the change of Nb concentrations in the β-Zr(Nb) phase, which reveals the system kinetics for approaching equilibrium.
AB - 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. In situ neutron diffraction has been used to characterize the phase transformation process of the nuclear structural material Zr-2.5Nb (mass%) while subjected to heating and cooling cycles. The shift of diffraction peaks, as shown in the image, has been evaluated by Vegard's law to track the change of Nb concentrations in the β-Zr(Nb) phase, which reveals the system kinetics for approaching equilibrium.
UR - http://www.scopus.com/inward/record.url?scp=80052402019&partnerID=8YFLogxK
U2 - 10.1002/adem.201000350
DO - 10.1002/adem.201000350
M3 - 文章
AN - SCOPUS:80052402019
VL - 13
SP - 882
EP - 886
JO - Advanced Engineering Materials
JF - Advanced Engineering Materials
SN - 1438-1656
IS - 9
ER -