Fatigue Strength of Wire Arc Additive Manufactured Nano‐Particle Enhanced AA7075 Material
Bibliographic record
Abstract
ABSTRACT The fatigue strength of wire arc additive manufactured (WAAM) nano‐particle enhanced AA 7075 material was investigated. The material could be deposited without solidification cracks to form a slender wall; however, the fatigue strength was lower than AA 7075 produced by either additive cold spray deposition or rolling. Most of the fatigue cracks initiated from the surface or near‐surface porosity. The microstructure of the additive manufactured AA 7075 consisted of fine and equiaxed grains, with an average grain size of 10.4 μm. SEM observation revealed agglomerated TiC clusters with sizes > 1 μm located along the grain boundaries. A method for estimating the equivalent defect‐free S‐N curve was proposed by using a √area parameter. It is suggested that the defect‐free WAAM material would be comparable to that of solutionized cold spray deposited AA 7075.
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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".