Non-destructive testing of laser welds in tailored blanks using electromagnetic transducers
Why this work is in the frame
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Bibliographic record
Abstract
An ultrasonic system using electromagnetic acoustic transducers has been developed at the Fraunhofer Institute for Non-Destructive Testing (IZFP), in order to test laser welds in tailored blanks. Shear horizontal modes are exploited to detect different types of defects in the laser welds, such as lack of penetration, lack of fusion, mismatch and cracks. In the present work, studies of the discontinuities of the laser weld that affect specularly reflected and non-specularly signals have been carried out on ferritic sheets. Geometric parameters of the laser weld, such as the fusion-zone width and the discontinuities at the weld root, were measured and compared with the amplitude of the reflected signals. Furthermore, X-ray radiographs and metallography were made to obtain additional information on the different defects, which affect the ultrasonic signal. From our results we conclude that under thickness and incomplete penetration at the root, together with the pores of the weld affect the reflected signal more than any other discontinuity.
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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 | 0.002 | 0.001 |
| 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 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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