Modeling of Transport Phenomena in Low-Head Direct-Chill Caster for AA7050 Alloy
Bibliographic record
Abstract
As an extension of earlier work, a three-dimensional numerical model has been developed for an industrial-scale low-head direct-chill slab casting process for the long freezing range aluminum alloy AA7050. The model has taken into account the coupled nature of the turbulent melt flow and the solidification heat transfer aspect of the direct-chill casting process. Computer simulations were performed to predict the velocity and temperature fields, the sump profile, the mushy thickness, and the shell thickness at the exit of the mold. Specifically, the aforementioned results were obtained for four casting speeds, varying from 60 to , for three metal–mold effective heat transfer boundary conditions, varying from 1.0 to , and for three pouring temperatures of inlet melt, namely, 645, 661, and 693°C. A stepwise change of the cooling water temperature in the mold and impingement and free-streaming regions, were considered to reflect the temperature history of the cooling water conditions in the industry. The importance of the present study lies in the fact that, by rolling the cast slabs from the direct-chill process, the obtained plates, sheets, strips, and foils of the aforementioned alloy are used extensively by the aerospace industry.
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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 | 0.000 | 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) | 0.000 | 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".