Electrode worksheet interface behaviour during resistance spot welding of Al alloy 5182
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Bibliographic record
Abstract
Resistance spot welding of aluminium alloy 5182 with spherical tip electrodes was investigated. Surface interaction between electrode and worksheet was focussed to understand the pitting behaviour of electrode. Both experimental work and finite element analysis were employed. It was found that the interaction between electrode tip and worksheet surface that occurred during the load ‘squeezing’ phase of the welding sequence of resistance spot welding process had a significant effect on the electrode pitting behaviour. At this interface, squeezing caused surface shear stress that strongly suggested the possibility of slip at the periphery of the contact region. This suggestion of slip was consistent with disrupted oxide layer and reduced electrical contact resistance near the periphery of the contact. At the beginning of the current phase, current concentrated near the periphery caused high constriction resistance which resulted in alloying, pickup and eventually pitting of electrode in a ring around the contact centre.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it