| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Metallurgical Evaluation of Near-Canister Degradation of Charpy Toughness Observed in Low Alloy Steel Billets Produced by PM-HIP |
| Author(s) |
Bryan D. Miller, Eric J Sload, Terrance K. Nolan, Colin D Ridgeway |
| On-Site Speaker (Planned) |
Bryan D. Miller |
| Abstract Scope |
Powder metallurgy - hot isostatic pressing (PM-HIP) is being evaluated for production of pressure vessel components for small modular reactor (SMR) applications. Extensive material testing of a low alloy steel (A508 Grade 4N) has previously identified the material is subject to a variation in Charpy impact toughness through the thickness of billets produced by PM-HIP practices. To understand the source of this variation, an extensive metallurgical evaluation was performed to compare the microstructure of the near-canister material (with lowest Charpy toughness) to that of the interior canister material (with highest Charpy toughness). Utilizing a combination of materials characterization techniques, two metallurgical factors were identified that could impact Charpy toughness: the formation of oxide particles on prior austenite grain boundaries and the formation of a non-uniform grain size distribution. Potential causes/remedies for each of these factors will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Characterization, Mechanical Properties |