Effects of heavy ion irradiation on Zr-2.5Nb pressure tube alloy. II. Orientation dependent dislocation loop propagation and elemental redistribution
Bibliographic record
Abstract
The irradiation induced microstructure of heavy ion irradiated Zr-2.5Nb alloy has been characterized by X-ray diffraction and transmission electron microscopy (TEM). Diffraction line profile analysis is used to analyze the X-ray diffraction data and anisotropic responses to irradiation in terms of peak broadening in axial direction (AD; sample surface normal aligned with axial direction) and transverse direction (TD; sample surface normal aligned with transverse direction) samples. More specifically, AD samples demonstrate a significantly higher peak broadening than TD for the same irradiation dose level. TEM characterization shows that heavy ion irradiation induces small <a> type dislocation loops in the range of 2-10 nm in diameter. However, up to 0.2 dpa, the dislocation densities calculated from X-ray diffraction and TEM characterization both show comparable quantities for AD and TD samples. The considerable additional peak broadening of AD samples is attributed to an intergranular strain distribution. Chemi-STEM analysis shows that Fe is depleted from β-phase to α-β phase boundary and then into the α matrix, mainly due to ion sputtering during heavy ion irradiation.
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".