Microstructure Evolution in Directionally Solidified Fe–C–Mn–(Si) Peritectic Steels
Bibliographic record
Abstract
Bridgman solidification experiments are carried out on Fe–C–Mn–Si peritectic steels to clarify how growth velocity ( V ) and alloy composition govern microstructural evolution. At velocities of 10–120 μm s −1 , the microstructures exhibit competitive growth between primary δ dendrites, are subsequently enveloped by γ ‐austenite in the interdendritic regions. The primary dendrite arm spacing (PDAS) decreases systematically with increasing V but coarsens unexpectedly at intermediate growth rates in the presence of silicon. Experimental measurements are benchmarked against PDAS scaling models to assess predictive accuracy. Particular attention is given to the role of Si in modifying interfacial morphology and mushy zone characteristics. The results demonstrate that elevated Si levels, when coupled with faster growth velocities, extend the mushy zone length and are associated with increased susceptibility to interdendritic solidification cracking. These findings provide mechanistic insight into crack formation in peritectic steels and highlight composition–processing interactions critical for continuous casting practice.
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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 | 0.001 | 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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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".