Structure and properties of LW 4280, a new high γ′ Ni-based superalloy fabricated by laser powder bed fusion
Bibliographic record
Abstract
This study presents the successful development of a new high γ′ nickel-based superalloy, LW 4280, using laser powder bed fusion. Microstructural analysis revealed the absence of γ′ precipitates in the as-built condition. A designed sub-solvus heat treatment resulted in a bimodal distribution of γ′ precipitates. The heat-treated specimens displayed yield strength of 1038, 904, 690, 500, 333, 264, and 169 MPa, the ultimate tensile strength of 1455, 1055, 807, 621, 424, 329 and 205 MPa, and elongation of 26%, 26%, 17%, 13%, 24%, 19% and 30% at 21, 760, 871, 927, 982, 1038, and 1065 ⁰C, respectively. Stress rupture tests on heat-treated specimens displayed good rupture characteristics, with rupture times of 190, 205, and 42 h at 871, 927, and 981 °C for stresses of 276, 152, and 138 MPa, respectively. A fractographic analysis was conducted on both the tensile and stress-ruptured specimens to comprehend the failure mechanism.
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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 | 0.000 | 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) | 0.001 | 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".