Evolution of lattice strains in three dimensions during in situ compression of textured Zircaloy-2
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Bibliographic record
Abstract
The evolution of lattice strains in Zircaloy-2 was investigated in situ by time-of-flight neutron diffraction during uni-axial compression in three principal directions, normal, transverse and rolling. The material is a warm-worked Zircaloy-2 slab with basal plane normals mostly concentrated in ND. Lattice strains relative to the undeformed sample were measured by neutron diffraction during cyclic compression and unloading for three test directions and three scattering vector directions. Intensity variations of the reflections were monitored to assess the grain rotations. Substantial tensile twinning was inferred from the evolution of {0002} lattice strains and the intensity of prismatic and basal poles. The spread of lattice strains in the test direction (amongst different crystal orientations) is much greater in compression than in tension. The sources leading to this asymmetry were ascribed, through preliminary simulations using an elasto-plastic self-consistent model, to the compressive load, the occurrence of tensile twinning and thermal residual strains.
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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 | 0.004 | 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 it