About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components III
|
Presentation Title |
The Influence of Nanoindentation Orientation on Deformation Mechanisms in Irradiated Fe – P and Fe – N |
Author(s) |
Patrick Henry Warren, Keyou Mao, Janelle Wharry |
On-Site Speaker (Planned) |
Patrick Henry Warren |
Abstract Scope |
The objective of this study is twofold: first to evaluate differences in deformation mechanisms induced by Berkovich nanoindentation along different crystallographic directions, and second to contrast the deformation mechanisms in irradiated substitutional (Fe–P) and interstitial (Fe–N) binary alloys. Nanoindentation is a widely used method for evaluating hardening in ion irradiated layers. However, the geometry of the Berkovich nanoindentation tip produces anisotropic, orientation-specific plasticity. Moreover, the nature of the alloying elements (substitutional or interstitial solutes), will also influence the irradiated microstructures and consequently the deformation mechanisms. In this work, indents are made along the <001> and <011> crystallographic directions on [001] grains in irradiated and as-received Fe–P and Fe–N. Deformation mechanisms are discerned by transmission electron microscopy (TEM). In Fe–P, indent direction changes the deformation mechanism from cross slip to slip, whereas in Fe–N, stress-induced martensitic phase transformations occur but are pinned by irradiation-induced defects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Nuclear Materials, Iron and Steel |