MECHANICAL PROPERTIES OF ZIRCALOY-2 NEUTRON IRRADIATED TO HIGH FLUENCE
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Zircaloy-2 specimens neutron-irradiated at 70 °C to a fluence of 41.0 × 1025 n m−2 (E > 1 MeV) are deformed in tension at 23 °C and at 170 °C in the longitudinal and transverse directions, respectively. Neutron irradiation significantly increases the strengths of the material, accompanied by a corresponding decrease in ductility. The effect is such that the 0.2% yield stress (YS) and ultimate tensile strength are always greater in the longitudinal than in the transverse direction at low fluence (<35 × 1025 n m−2). While the longitudinal strength increases more rapidly with fluence than the transverse strength, they begin to converge at a fluence ≥20 × 1025 n m−2, becoming almost identical at a fluence >35 × 1025 n m−2. This indicates a change in deformation behaviour, from anisotropic to isotropic with increasing amounts of neutron fluence. The microstructure of the irradiated Zircaloy-2 (X-18) consists of a high density of 5–10 nm diameter a-type dislocation loops, with no observed c-component loops. Deformed longitudinal and transverse specimens of the X-18 that have been irradiated to fluence ≈25.9, 35.4, and 41.3 × 1025 n m−2 at 23 °C contain approximately an even distribution of dislocation-free channels on prismatic and first-order pyramidal planes, with a small fraction of second-order pyramidal channels. This is in agreement with the 0.2% YS in the longitudinal and transverse directions converging to the same value at high fluences.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.004 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it