About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components III
|
Presentation Title |
Non-destructive Stress Evaluation in Nuclear Materials by Positron Annihilation Spectroscopy |
Author(s) |
Farida Selim, Djamel Kaoumi |
On-Site Speaker (Planned) |
Farida Selim |
Abstract Scope |
Understanding radiation damage and assessing the mechanical properties of structural materials are essential for developing high-strength materials with good radiation tolerance for the development of advanced nuclear reactors. Positron annihilation spectroscopy (PAS) was shown to be an effective tool in probing radiation damage on small length scale not accessible by most characterization techniques including HRTEM. Positron can also probe the microstructural changes associated with stress generation and the measured PAS parameters reflect the induced deformation due to tensile, fatigue, cold work, and bending. However not much work was done to employ PAS for assessing the mechanical properties. Here we will show that PAS is an effective sensitive nondestructive tool for assessing the mechanical strength of structural materials and the PAS defect parameters mimic the stress strain engineering curve. Examples will be given on stress measurements in steel alloys the prospect of advancing material strength evaluation by PAS will be discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Iron and Steel, Mechanical Properties |