Microcapillary Polarization of Friction Stir Welds in AZ31B Magnesium Alloy
Bibliographic record
Abstract
Corrosion of friction stir welds made in AZ31B magnesium alloy has been investigated using the microcapillary polarization technique. Various weld regions were examined in both spot and seam welds. The stir zone showed a higher reduction potential than the thermo-mechanically affected zone (TMAZ) and the base metal, due to the dissolution of β-Mg17Al12 particles. The absence of second phase particles resulted in elimination of harmful microgalvanic cells between the β-Mg17Al12 particles and the α-Mg matrix, and an increased concentration of aluminum in solid solution. The noble stir zone formed a macro galvanic cell with the base metal, which resulted in accelerated corrosion of the TMAZ. No significant variation in the electrochemical response of various weld zones was seen between seam and spot welds.
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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".