| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Recent Advances in Electron Back-Scattered Diffraction and Related Techniques
|
| Presentation Title |
Micro-analysis of δ-hydrides in Pure Zirconium by HR-EBSD and TKD |
| Author(s) |
Xuewei Li, Angus J Wilkinson, David Armstrong, Junliang Liu |
| On-Site Speaker (Planned) |
Xuewei Li |
| Abstract Scope |
Microstructure, crystallography and local deformation of both inter- and intra-granular fcc δ-hydrides in pure zirconium were characterized by HR-EBSD and TKD. The orientation relationship between δ-hydrides and α-zirconium matrix is {0001}_α ||{111}_δ ⟨11-20⟩_α ||⟨110⟩_δ for all the cases studied. Both HR-EBSD and TKD results showed high densities of dislocations in hydrides and surrounding matrix as a result of local plastic deformation partially accommodating the volume expansion and shearing during α-zirconium to δ-hydrides transformation. Two twin related orientation variants were often seen within the δ-hydride dispersion which is expected to minimize the transformation strain.These results may enable a better understanding of hydride growth and hydride induced degradation of zirconium base alloys. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Nuclear Materials, Other |