TY - GEN
T1 - Phase field simulations of hydride reorientation in Zircaloys
AU - Radhakrishnan, B.
AU - Gorti, S. B.
AU - Clamo, K.
AU - Yan, Y.
PY - 2013
Y1 - 2013
N2 - In Zircaloy clad tubes the hydrides that form during reactor operation appear in the circumferential direction. However, when the spent tubes are removed from the reactor and kept in dry storage, the circumferential hydrides dissolve and re-precipitate in the radial direction due to a temperature rise that is above the solvus temperature of the hydrides and a change in the stress state during the cooling period. We present two-dimensional phase field simulations in the radial-circumferential plane of the tube to show the relative ease of re-precipitation in the radial direction of three different types of hydrides - ζ and y hydrides that are metastable and the equilibrium à hydride. The reorientation behavior appears to depend on the relative elastic anisotropy as well as the anisotropy in the transformation strain between the matrix and the precipitate type.
AB - In Zircaloy clad tubes the hydrides that form during reactor operation appear in the circumferential direction. However, when the spent tubes are removed from the reactor and kept in dry storage, the circumferential hydrides dissolve and re-precipitate in the radial direction due to a temperature rise that is above the solvus temperature of the hydrides and a change in the stress state during the cooling period. We present two-dimensional phase field simulations in the radial-circumferential plane of the tube to show the relative ease of re-precipitation in the radial direction of three different types of hydrides - ζ and y hydrides that are metastable and the equilibrium à hydride. The reorientation behavior appears to depend on the relative elastic anisotropy as well as the anisotropy in the transformation strain between the matrix and the precipitate type.
UR - http://www.scopus.com/inward/record.url?scp=84886930878&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84886930878
SN - 9781627486446
T3 - 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013: Integrating Storage, Transportation, and Disposal
SP - 644
EP - 650
BT - 14th International High-Level Radioactive Waste Management Conference, IHLRWMC 2013
T2 - 14th International High-Level Radioactive Waste Management Conference: Integrating Storage, Transportation, and Disposal, IHLRWMC 2013
Y2 - 28 April 2013 through 2 May 2013
ER -