Precipitation and phase transformations in IN718 manufactured throughpowder bed fusion
Bibliographic record
Abstract
IN718 is a Ni-based superalloy typically manufactured by casting and/or forging. However, more recently, parts have been produced using additive manufacturing (AM) technologies. The microstructure and mechanical properties of the alloy depend on the AM process parameters, such as laser power, scanning speed, beam size, and powder feed rate, among others. Consequently, element segregations and unusual stable and metastable phases form in the as-printed condition. This work presents a computational and experimental study of the type, morphology, chemical composition, and quantity of precipitates, as well as the phase transformations in IN718 encountered during the Powder Bed Fusion (PBF) process. Differential Scanning Calorimetry (DSC) and Electron Backscatter Diffraction (EBSD) techniques were employed to obtain thermodynamic, chemical, and microstructural information necessary for the thermodynamic calculations to understand phase transformations during the high heating and cooling rates conditions encountered during the PBF process.
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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".