The effects of strain path change on the microstructure, texture, and mechanical properties of accumulative roll-bonded (ARBed) AA1050 strips
Bibliographic record
Abstract
In this study, the effect of unidirectional accumulative roll bonding (UARB) and rotational ARB (RARB) on the microstructure, texture, and mechanical properties of AA1050 sheets was investigated. The X-ray diffraction technique was used to study the microstructural and textural evolutions in the processed samples. It was found that the successive sample rotation suppressed the evolution of low-angle grain boundaries (LAGBs) to high-angle ones in the RARBed sheets. However, the grain size was dramatically reduced from 35.7 μm to 169 nm in the starting Al and the processed sample by eight RARB cycles, respectively. Akin to the UARB path, the RARB route led to a drastic drop in Cube {001} <100> texture intensity. Compared to the UARBed strips, additional Goss {011} <100>, A {011} <111>, P {011} <122> and BR {236} <385> components were observed in the RARB-processed sheets. Interestingly, the rotation of Goss-oriented grains towards the Brass {011} <211> component was frustrated by consecutive sample rotation around its normal direction (ND) between RARB passes. In addition to the microhardness test, the uniaxial tensile test was performed at room temperature to evaluate the mechanical properties of the processed aluminum. The results showed that a sharp increase in hardness reached a plateau at higher cycles. In terms of tensile properties, the ultimate tensile strength (UTS) increased to its peak of 332 MPa after eight cycles of the RARB method. Although, their lower interlayer bond strength gave them low elongation compared to their UARBed counterparts.
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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 | 0.001 | 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 | 0.001 |
| 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".