Labyrinth structures in Zircaloy-4 as a consequence of strain ageing effects on fatigue |
| |
| Authors: | A. F. Armas I. Alvarez-Armas G. Mansilla |
| |
| Affiliation: | (1) Institute de Física Rosario, CONICET, Universidad Nacional de Rosario, Bv. 27 de Febrero 210 bis -2000, Rosario, Argentina;(2) Present address: Institut für Material- und Festkoerperforschung II (IMF II), Kernforschungszentrum Karlsruhe, Postfach 3640, D-7500 Karlsruhe 1, Germany |
| |
| Abstract: | Dislocation structures in Zircaloy-4 samples fatigued at 623, 713 and 823 K were studied by transmission electron microscopy techniques. The samples, cycled with a total strain rate 2×10–3s–1, show a linear cyclic hardening rate which is maximum at temperatures where stronger strain ageing effects were reported. A two-wall structure similar to the labyrinth structure observed in fcc metals was found. This structure is attributed to the enhanced dislocation activity produced by strain ageing phenomena. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
