Sheared edge formability of multi-phase steels under in- and out-of-plane deformation
Why this work is in the frame
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Bibliographic record
Abstract
Multi-phase advanced high strength steels can exhibit significant sheared edge sensitivity due to their microstructures and alloying elements. Processing defects such as centerline segregation of martensite or Ti-based inclusions can affect edge formability depending upon the applied deformation such as in-plane stretching versus out-of-plane hole extrusion. This study investigates the influence of punching clearance and deformation mode on the sheared edge formability of two hot-rolled MP800 steels, MP800-V1 and MP800-V2, which differ in local ductility and severity of centerline segregation. Hole punching was performed at clearances ranging from 5% to 20%, followed by hardness mapping in the shear affected zone (SAZ), conical hole expansion (HX), and in-plane bending tests. The MP800-V1 steel exhibited negligible sensitivity to the punch-die gap, while MP800-V2, which had centerline segregation, achieved the highest edge formability for clearances of 12% and 20% during HX. Additionally, MP800-V1 exhibited a strong sensitivity to the applied loading for clearances of 5% and 8% , with fracture strains from in-plane bending lower than HX by 0.20 at 5% and 8% clearance. In contrast, MP800-V2 showed minimal variation in fracture strains between bending and HX, except at 8% clearance, highlighting the importance of boundary conditions on the sheared edge stretchability.
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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 | 0.000 | 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) | 0.000 | 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