Characterization and modeling of creep mechanisms in Zircaloy-4

J. H. Moon; P. E. Cantonwine; K. R. Anderson; S. Karthikeyan; M. J. Mills

doi:10.1016/j.jnucmat.2006.01.023

Characterization and modeling of creep mechanisms in Zircaloy-4

J. H. Moon, P. E. Cantonwine, K. R. Anderson, S. Karthikeyan, M. J. Mills

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

The deformation microstructure and creep mechanisms of Zircaloy-4 have been investigated. Four Zircaloy-4 specimens were tested at different temperatures and stress levels and the deformation microstructures of these specimens were analyzed using transmission electron microscopy. On the basis of microstructural observation of a-type screw dislocations in prismatic slip systems, the modified jogged-screw model has been applied as a rate controlling mechanism for creep of Zircaloy-4. In addition, the stress dependency of dislocation density, jog spacing, and jog height has been evaluated via modeling and experimental observations. The purpose of this study is to provide a detailed understanding of the creep deformation of Zircaloy-4 and prediction of creep rates in this alloy based on the microstructural information obtained from TEM analysis.

Original language	English
Pages (from-to)	177-189
Number of pages	13
Journal	Journal of Nuclear Materials
Volume	353
Issue number	3
DOIs	https://doi.org/10.1016/j.jnucmat.2006.01.023
State	Published - Jul 15 2006
Externally published	Yes

Keywords

C1100
D0400
E0300
T0100
Z0100

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10.1016/j.jnucmat.2006.01.023

Cite this

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title = "Characterization and modeling of creep mechanisms in Zircaloy-4",

abstract = "The deformation microstructure and creep mechanisms of Zircaloy-4 have been investigated. Four Zircaloy-4 specimens were tested at different temperatures and stress levels and the deformation microstructures of these specimens were analyzed using transmission electron microscopy. On the basis of microstructural observation of a-type screw dislocations in prismatic slip systems, the modified jogged-screw model has been applied as a rate controlling mechanism for creep of Zircaloy-4. In addition, the stress dependency of dislocation density, jog spacing, and jog height has been evaluated via modeling and experimental observations. The purpose of this study is to provide a detailed understanding of the creep deformation of Zircaloy-4 and prediction of creep rates in this alloy based on the microstructural information obtained from TEM analysis.",

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T1 - Characterization and modeling of creep mechanisms in Zircaloy-4

AU - Moon, J. H.

AU - Cantonwine, P. E.

AU - Anderson, K. R.

AU - Karthikeyan, S.

AU - Mills, M. J.

PY - 2006/7/15

Y1 - 2006/7/15

N2 - The deformation microstructure and creep mechanisms of Zircaloy-4 have been investigated. Four Zircaloy-4 specimens were tested at different temperatures and stress levels and the deformation microstructures of these specimens were analyzed using transmission electron microscopy. On the basis of microstructural observation of a-type screw dislocations in prismatic slip systems, the modified jogged-screw model has been applied as a rate controlling mechanism for creep of Zircaloy-4. In addition, the stress dependency of dislocation density, jog spacing, and jog height has been evaluated via modeling and experimental observations. The purpose of this study is to provide a detailed understanding of the creep deformation of Zircaloy-4 and prediction of creep rates in this alloy based on the microstructural information obtained from TEM analysis.

AB - The deformation microstructure and creep mechanisms of Zircaloy-4 have been investigated. Four Zircaloy-4 specimens were tested at different temperatures and stress levels and the deformation microstructures of these specimens were analyzed using transmission electron microscopy. On the basis of microstructural observation of a-type screw dislocations in prismatic slip systems, the modified jogged-screw model has been applied as a rate controlling mechanism for creep of Zircaloy-4. In addition, the stress dependency of dislocation density, jog spacing, and jog height has been evaluated via modeling and experimental observations. The purpose of this study is to provide a detailed understanding of the creep deformation of Zircaloy-4 and prediction of creep rates in this alloy based on the microstructural information obtained from TEM analysis.

KW - C1100

KW - D0400

KW - E0300

KW - T0100

KW - Z0100

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SP - 177

EP - 189

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 3

ER -

Characterization and modeling of creep mechanisms in Zircaloy-4

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Keywords

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