Microstructural characterization and mechanical properties of spot welded dissimilar advanced high strength steels
Bibliographic record
Abstract
<p>Increased use of advanced high strength steels (AHSS) in resistance spot welding is necessary for manufacturing safe and affordable vehicles. A significant body of work has been completed to document the resistance spot weldability of AHSS. However, In automotive applications, the dissimilar material combinations are very common In automotive construction. There is no literature regarding the resistance spot welding of dissimilar materials DP600 and HSLA350 steels. The objective of this study was to investigate the weldability and mechanical properties of resistance spot welds between HSLA350 and DP600 steels. The dissimilar material spot weld performance was different than the similar material spot welds in each of the HSLA350 and DP600 steels and exhibited different heat affected zone hardness. The DP600 weld properties played a dominating role on the microstructure and mechanical properties of the dissimilar material spot welds. However, the fatigue performance of the dissimilar welds was similar to that of the HSLA welds. Fatigue tests on the dissimilar materials spot welds showed that at a given stress amplitude the 5.5 mm diameter nugget exhibited higher fatigue strength than the 7. 5 mm diameter nugget.</p>
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 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) | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".