Modifying strengthening mechanisms in MoNbZrTiV refractory high-entropy alloy particles through different mechanical alloying routes
Bibliographic record
Abstract
MoNbZrTiV refractory high-entropy alloy (RHEA) particles are developed using conventional and sequential mechanical alloying (MA) routes at varying milling times. The conventional MA route employed a single-step milling of Mo, Nb, Zr, Ti, and V. In contrast, the sequential MA route started with the milling of MoNbZr, followed by a stepwise addition of Ti and V at specific milling intervals. Increased interdiffusion zones, resulting from finer lamellar structure formation, lead to ‘chemical homogenization’ and are observed with increasing milling time. After 24 h of milling, comparable experimental hardness values are recorded, 7.62 GPa for conventionally milled and 7.48 GPa for sequentially milled particles, primarily due to the evolution of three body-centered cubic (BCC) phases, corresponding to Nb-, Zr-, and V-rich phase structures in both MA routes. Further investigations suggest a distinct difference in the calculated dislocation densities, phase volume fractions, and the related phase strengthening mechanisms between the two routes as a function of milling time. Conventionally milled particles exhibit dislocation strengthening, whereas sequentially milled particles reveal possible dislocation motion impediment associated with V-V split interstitial defect formation. Further, the thermodynamic parameters (complemented with calculated power and energy) provided valuable predictions for the multi-phase solid solution formation.
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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) | 0.001 | 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".