Abstract
Extensive plastic deformation in the metal underneath the oxide scale in autoclave tested Zircaloy-2 was studied using transmission electron microscopy (TEM). It was concluded that the plastic deformation is created by creep during oxidation, and is not caused by surface treatment, sample preparation or cooling from autoclave temperatures. Evidence of large strains was found in the form of dislocation tangles, dislocation patches and sub-grain formation, and also indications of twinning were found. The heavily deformed layer is around a few μm thick and no obvious difference could be seen between alloys with different strength or different oxide thickness.
| Original language | English |
|---|---|
| Pages (from-to) | 30-34 |
| Number of pages | 5 |
| Journal | Journal of Nuclear Materials |
| Volume | 444 |
| Issue number | 1-3 |
| DOIs | |
| State | Published - 2014 |
| Externally published | Yes |
Funding
Sandvik Materials Technology is thanked for supplying the materials and performing the autoclave testing. This work was carried out with the support of Westinghouse Electric Sweden AB, Sandvik AB, Vattenfall Nuclear Fuel AB, OKG AB and the Swedish Radiation Safety Authority.