Some aspects of grain refining of Al-Si cast alloys
Bibliographic record
Abstract
A study on the effect of different grain refiners and addition technique in Al-7%Si alloys was carried out. The results show that the Al3Ti phase reacts with silicon (Si) in the molten alloy forming a new compound (Al,Si)3Ti. This reaction is independent of the grain refiner addition technique. The temperature of the liquid metal causes a significant change in the Al3Ti phase morphology, which precipitates in the form of platelets at 750°C and in a dendritic form at 950°C. It has also been observed that while (Al,Si)3Ti phase platelets precipitate within the α-aluminum dendrites, the TiB2 or AlB2 particles are rejected into the surrounding interdendritic regions. The results also reveal that addition of 100ppm B will reduce the initial grain size by ~ 85%, which is more than the reduction obtained with the addition of 0.2%Ti in the form of Al-10%Ti (about 65%).
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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".