Effect of Sr on primary<i>α</i>-Fe phase in liquid Al-11.5Si-0.4Mg cast alloy
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Bibliographic record
Abstract
The effect of Sr on the sedimentation of primary α-Fe phase has been investigated at superheating temperatures of 760 and 900 °C. A convection free experimental technique was used to aid in quantifying the primary α-Fe particles sedimented at 600 °C for 4 h. Sr marginally decreases the formed particle weight at normal melting temperature (760 °C), but greatly increases the particle weight at the superheating temperature of 900 °C. Sr refines primary α-Fe particles at both temperatures, causing the increase of the number of primary α-Fe particles, especially when superheated at 900 °C. In addition, Sr causes a decrease in the particle volume fraction but an increase in the number of the sedimented particles, and a great increase in the depth of the sediment in the mould at higher superheating temperatures. These observations are interpreted in terms of the precipitation of Fe rich particles on suspended oxide films, and the rigidisation of suspended films at higher temperatures, possibly as a result of their change in chemistry, but especially as a result of inflation of their doubled-over form by hydrogen, and the effect this has on the multiplication of growing iron rich precipitates as a result of their mechanically unstable substrate.
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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 | 0.001 |
| 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 it