The correlation of austenite stability and sequence of strain accommodation during room temperature deformation of a duplex lightweight steel
Bibliographic record
Abstract
The effect of austenite stability on the sequence of room temperature strain accommodation has been investigated in Fe-0.07C-11.15Mn-5.6Al-0.12Si lightweight steel through employing interrupted tensile tests coupled with electron backscattered diffraction analysis. It has been found that in the microstructure holding finest grain size, the strain is mainly accommodated through austenite via transformation induced plasticity (TRIP) effect during the first stage of deformation (up to the true strain of 0.03), which hinders Kernel Average Misorientation (KAM) increment in constituent phases. Although, high stability of austenite limits the first deformation stage to low strains and the contribution of ferrite along with austenite is traced in the following stages as indicated by KAM increment, leading to higher TRIPing saturation strains, due to this simultaneous strain accommodation. However, by lowering the austenite stability, strain accommodation behaves differently in which case, low stability of the austenite leads to intensified TRIP effect which accommodates the imposed strains to larger strains (up to the true strain of 0.08) during the first stage. Respectively, due to intense TRIPing during the mentioned stage, KAM of both constituent phases remains low, but this severe solo accommodation decreases the fraction of austenite dramatically and saturates the capability for TRIP effect. Subsequently, load transfers from austenite to the ferrite during the second deformation stage leading to a sharp reduction in work hardening and increment in KAM value. Despite the microstructure holding higher austenite stability which represents simultaneous accommodation, sequential strain accommodation deteriorates the hardening capability and the strength/ductility balance of the material.
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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 | 0.000 |
| 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) | 0.001 | 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".