Effects of Prior Cyclic Loading on the Strength of HIPed Silicon Nitride
Why this work is in the frame
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Bibliographic record
Abstract
The strength of hot isostatically pressed (HIPed) silicon nitride (NT-154 produced by Norton/TRW Ceramics) was investigated after cyclic loading at room temperature and elevated temperatures. Four point bend fatigue tests were conducted in load control at an R ratio of 0.1 and a frequency of 1 Hz. The accumulated fatigue damage was assessed by stopping the test after a certain number of cycles and measuring the flexure strength at room temperature in stroke control. The effects of (i) number of cycles, (ii) maximum applied stress and (iii) temperature of cyclic loading have been studied. Increasing the temperature in the range 1200 to 1400 °C had the most detrimental effect on the residual strength. The results are explained in terms of microstructural changes.
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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 | 0.001 | 0.001 |
| 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 | 0.001 |
| 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 it