کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1570049 | 999945 | 2006 | 13 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Characterization and modeling of creep mechanisms in Zircaloy-4 Characterization and modeling of creep mechanisms in Zircaloy-4](/preview/png/1570049.png)
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.
Journal: Journal of Nuclear Materials - Volume 353, Issue 3, 15 July 2006, Pages 177–189