Some Observations on the Columnar-to-Equiaxed Transition in Nickel- base Superalloys
Bibliographic record
Abstract
Several workers have studied the columnar/equiax transition experimentally and/or by modelling techniques, usually employing one of the highlysegregating low-melting alloys such as Al-Cu as the test material.It is clear from industrial practice that the high-temperature alloys exhibit this transition both in conventional casting and in directional solidification methods.These alloys also show the transition under appropriate thermal circumstances in the remelting methods including vacuum arc and electroslag remelting.The objective of the present study is to demonstrate the relation between results obtained for directionally solidified cast alloys, single crystal castings and remelt ingots in respect of the thermal and nucleation conditions for the transition.The resultsindicate that the critical nucleation density is in good agreement with previously reported models in both cases and that in the nickel-base superalloys containing Ti the main nucleant is most probably TiN.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".