Investigation of the influence of welding on 6351-T6 aluminum alloy adjacent to a joint.
Bibliographic record
Abstract
Increased welding speeds have reduced the heat input in the parent metal, thus reducing the width of the heat-affected zone. The present CSA Standard CAN3-S157-M83 "Strength Design in Aluminum", requires that the zone affected by a weld be taken to extend a distance of 25 mm each side from the centre of the weld. The objective of this experimental investigation was to determine the width of the heat-affected zone and the strength of the metal across the heat-affected zone adjacent to the weld. Ninety-four specimens, parent and welded metal, were tensile tested, 33 specimen bars and plates were hardness tested and 46 cantilevered assemblies were flexure tested. The ultimate tensile stresses and the hardness numbers from the testing results were used to determine the width and strength of the heat-affected zone. This investigation has determined that the width of the heat-affected zone for a given weld size, alloy, welding procedure and heat input decreases with the increase in the plate thickness. Also, the average strength of the metal in the heat-affected zone was found to be higher than the CSA Standard requirements. Based on this investigation, it is concluded that a 6351-T6 aluminum alloy welded using an automatic welding operation, with a low and uniform heat input and with the use of a properly designed welding procedure, the width of the heat-affected zone can be reduced and the average strength of the metal in the heat-affected zone increased.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis2001 .A44. Source: Masters Abstracts International, Volume: 40-06, page: 1569. Adviser: M. K. S. Madugula. Thesis (M.A.Sc.)--University of Windsor (Canada), 2001.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".