High-resolution betatron X-ray imaging of porosity evolution in additively manufactured alloys
Bibliographic record
Abstract
Laser Wakefield Accelerators (LWFA) are employed to accelerate electrons to 100s of MeV-GeV energies and produce an intense coherent source of broadband keV X-rays via the betatron motion of the accelerating electrons. The present work aims to apply betatron X-rays for high-resolution, high-throughput 3D tomography of defect dynamics and porosity evolution in traditionally and additively manufactured aluminium alloys. The high-stability LWFA X-ray beamline at the Advanced Laser Light Source in Varennes, Canada will be utilized to examine the effect of loading direction and stress triaxiality on porosity evolution in AlSi10Mg alloys generally used in aerospace and automotive engineering. High-resolution X-ray tomography of material deformation will provide porosity evolution curves needed to validate models of ductile fracture in traditionally and additively manufactured alloys. Laser-driven X-ray imaging will facilitate high-throughput data collection, accelerating the characterization of complex mechanical processes in additively manufactured materials.
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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 | 0.001 | 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".