About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
Effect of side groove and temperature on the fracture behavior of small HT9 steel specimens |
| Author(s) |
Md Ershadul Alam, Anne Demma, Andrew Peterson, TS Byun, Stuart A. Maloy |
| On-Site Speaker (Planned) |
Md Ershadul Alam |
| Abstract Scope |
Fracture toughness tests were performed on a HT9 control material using three-point bend bar specimens with nominal dimensions of 14/5/3 mm in length/width/thickness, respectively. All specimens were fatigue pre-cracked to a crack-to-width ratio of approximately 0.5±0.05 and the static fracture data were analyzed in accordance with ASTM E1820. At room temperature and 180°C, a smooth load drop was observed following peak load. In contrast, continuous load increment with increasing displacement, along with pronounced crack blunting, was observed at elevated temperatures ranging from 360°C to 600°C. In some cases, secondary cracks and shear lips were also present. To promote the crack propagation along the defined crack plane, the specimens were side grooved to 30% of the total thickness to induce higher strain constraint. These results will be discussed along with implications related to temperature limitations for obtaining stable crack growth for valid fracture toughness testing with this small-scale specimen. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, High-Temperature Materials |