Phase stability, microstructure, and mechanical properties of the ultra-strong lightweight eutectic AlCr1.3TiNi2 alloy
Bibliographic record
Abstract
Thermal stability of the newly developed AlCr 1.3 TiNi 2 lightweight complex concentrated alloy (CCA) was assessed through a retention study of the phase composition, microstructure and mechanical properties after thermal exposures up to 1100 °C. The as-cast alloy with a density of 6.42 g/cm 3 , hardness of 669 HV, yield stress, ultimate compressive strength, and fracture strain of 1364 MPa, 2384 MPa and 19 %, respectively, displayed a near eutectic predominantly lamellar structure consisting of the Heusler-like L2 1 phase rich in Ni, Al, and Ti, and BCC phase rich in Cr. Although there was a partial change from lamellar to rod-like morphology during heating with some spheroidization, the overall coarsening of the lamellae was limited, and the initial lamellae width of 200–250 nm still remained below 500 nm after 10 h exposure at 1100 °C. The phase and microstructural stability was accompanied by the high retention rate of mechanical properties where the alloy retained about 95 % of its initial hardness, 94 % of yield stress and 66 % of ultimate compressive strength after exposures up to 1100 °C. Despite the anomaly of strength retention, the specific properties of this alloy are advantageous than that for conventional superalloys, high entropy alloys and CCAs designed for high temperature service.
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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".