Effects of Electromagnetic Force on Segregation Phenomena of Primary Crystals and Changes in Solidification Structure of Al-10Fe and Al-25Si Alloys
Bibliographic record
Abstract
In this study, solidification structure changes under electromagnetic force (EMF) were examined for Al-10Fe and Al-25Si alloys. One directional EMF was induced by applying DC currents of 100A and 130A with static magnetic fields. Solidification structure was examined using an optical microscope, X-ray computed tomography, and X-ray fluorescence mapping. When EMF was imposed from above the liquidus temperature, primary crystals were not segregated into one side of the ingots and instead were found to be segregated all along the ingot periphery for both Al-10Fe and Al-25Si. A fine hypo-eutectic structure containing Al dendrites was observed in areas devoid of primary crystals in the central parts of the Al-25Si ingots. These segregation phenomena of primary crystals did not occur when EMF was imposed from the point below the liquidus temperature, suggesting that EMF does not exert an effect on free crystals existing in the liquid metal. It also suggests that segregated primary crystals were not moved towards the periphery by EMF. It may prevent nucleating primary crystals from separating from the wall surface, hence enhancing nucleation on the wall and dense growth of crystals from the wall surface, resulting in a highly segregated solidification structure.
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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".