Dynamic Response of Residual Stresses due to Rapid Temperature Changes in Kaowool Reinforced AA339 Aluminum
Bibliographic record
Abstract
The residual stresses in the matrix of an AA339 aluminum/ 23%(vol.) Kaowool short fibre composite were measured by x-ray diffraction at 100°C, after rapid heating and cooling at 200°C/min between 100°C and 300°C. A special heating stage was developed, with a very low thermal expansion to minimize systematic errors due to specimen alignment and a very low thermal mass to permit rapid temperature changes. A linear position sensitive detector enabled diffraction peak profiles to be measured in 5 seconds. Rapid cooling from 300°C produced high residual stresses at 100°C which subsequently relaxed. After a slow thermal cycle (5°C/min heating and cooling) the stresses at 100°C were smaller and stable. Many subsequent rapid thermal cycles were required to establish the higher stresses and this behaviour is attributed to the development of a fine precipitate dispersion with a transition from coherent precipitates to incoherent ones. These results cannot be explained purely by dislocation mechanisms.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".