The Effect of Calcium on the Rolling Behaviour and Hot Tensile Properties of AA5182
Bibliographic record
Abstract
The impact of sodium on the edge cracking behaviour of high magnesium alloys such as 5182 has been the subject of many studies. Relatively less information is available on the role of calcium and much of this is contradictory, some authors reporting that relatively modest levels of Ca reduce hot ductility (and by inference promote edge cracking) whereas other reports recommend the intentional addition of calcium to these alloys in order to control oxidative casting defects such as vertical folds. This paper will describe and discuss a series of experiments in which AA5182 ingots containing sodium and calcium alone, and also in combination, were cast, hot-rolled and subsequently hot tensile tested. As expected, sodium alone led to a large drop in the hot tensile elongation and promoted edge cracking. However, no such effects were observed in materials containing only calcium. Calcium had a slight mitigating influence on the impact of sodium when both elements were present.
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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 | 0.001 | 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 | 0.001 |
| 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".