The effect of intermetallic compounds on laser weldability of dissimilar metal joint between magnesium alloy AZ31B and aluminum alloy 6061
Bibliographic record
Abstract
Laser overlap welding of dissimilar metals was performed between magnesium alloy AZ31B and aluminum alloy 6061,and the effect of intermetallic compounds(IMCs) in weld on weldability was investigated.It was found that solidification cracking was liable to occur in weld fusion region of the aluminum plate and in the weld region of the interface between plates of magnesium and aluminum for the center-line overlapped joint.Various Mg-Al series of IMCs were dispersed,rather than simply existed in form of IMC layers,in the weld of edge-line overlapped joint.The type of IMC in local regions of the weld varied according to the variation of magnesium content gradient in the weld.Non-crack welds of dissimilar metal overlapped joint of magnesium and aluminum could be achieved with appropriate laser processing parameters in the test condition.However,weld brittleness existed because of unavoidable Mg-AI series of IMCs in weld.The weld fusion region where multiple IMCs formed was the weakest part of the weld joint.
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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 | 0.001 |
| 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".