Static strain aging of Zircaloy-2: the effect of dislocation dynamics on yielding behaviour

Thorpe W.R. and Smith I.O. (1981) Static strain aging of Zircaloy-2: the effect of dislocation dynamics on yielding behaviour. Materials Science and Engineering, 49 1: 71-78. doi:10.1016/0025-5416(81)90135-X


Author Thorpe W.R.
Smith I.O.
Title Static strain aging of Zircaloy-2: the effect of dislocation dynamics on yielding behaviour
Journal name Materials Science and Engineering
ISSN 0025-5416
Publication date 1981-01-01
Sub-type Article (original research)
DOI 10.1016/0025-5416(81)90135-X
Open Access Status
Volume 49
Issue 1
Start page 71
End page 78
Total pages 8
Abstract The static strain-aging response of Zircaloy-2 was determined in the temperature range 293 - 723 K. A modified Hahn yielding model was found to provide a satisfactory description of the magnitude and shape of the yield points after aging, thereby providing information about the mobile dislocation density and the dislocation generation rate. For example, the characteristic double peak in the temperature dependence of strain aging was simplified to a single broad minimum in the mobile dislocation density over the temperature interval 500 - 700 K. The shape of the yield point was also found to be temperature dependent; the yield drop became less sharp at test temperatures above 648 K. This was ascribed to the inhibition of dislocation multiplication by dynamic strain aging. A kinetic law was developed by applying Snoek ordering kinetics to the process of dislocation locking and the resultant change in mobile dislocation density was then used to predict the strain-aging response as a function of aging time. The stress dependence of strain aging at 573 K was investigated at aging stresses of between 0.07 and 0.975 of the flow stress σf. The strain-aging response increased for aging at stresses between 0.07σf and 0.8σf, where-after it declined steeply to the limit of zero at the flow stress.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
Versions
Version Filter Type
Citation counts: Scopus Citation Count Cited 4 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Tue, 06 Sep 2016, 10:53:59 EST by System User