Relationships between Microstructural Parameters and Time-Dependent Mechanical Properties of a New Nickel Based Superalloy AD730™
Bibliographic record
Abstract
High temperature viscoplastic properties of the new nickel-based superalloy AD730 TM have been investigated, under creep and dwell-fatigue loading conditions.The aim of this study is to evaluate the influence of several microstructural parameters on these properties.Three microstructures have then been tested in creep and dwell-fatigue, at 700 °C and 850 °C: a Fine Grain microstructure, a Coarse Grain one and a Single Crystalline microstructure.The creep-controlling parameters at 850 °C are the grain size and intragranular γ′ volume fraction, whereas at 700 °C, these controlling parameters depend on the applied stress.Indeed, depending on the applied stress, changes of creep deformation mechanisms have been evidenced for both the Fine and Coarse Grain microstructures.Dwell-fatigue tests revealed that depending on the applied stress, the influence of the unloading phase may have a beneficial impact on the overall behavior.An attempt is proposed to explain this phenomenon, by highlighting the appearance of a "negative plastic deformation" occurring during the unloading phase in dwellfatigue tests at high maximum applied stresses.
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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 | 0.001 |
| 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".