Experimental study on hydrogen-induced crack propagation of X80 steel under alternating pressure fluctuations
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
In this study, cyclic loading is applied to the specimen placed in an autoclave with varied hydrogen gas pressure. The effect of hydrogen pressure and stress fluctuations on the fatigue crack growth rate is analyzed. The results show that the crack growth rate increases with the increase of hydrogen pressure, and under 3 MPa hydrogen pressure, the crack growth rate can be enhanced by one order compared with that in air. With the increase of loading frequency, the crack propagation rate of a single block decreases in hydrogen, while the crack growth rate remains constant in air. As the maximum stress is fixed during cyclic loading, the fatigue crack growth rate increases with the stress range. Based on the experimental results, a predictive model is proposed to quantify the crack growth rate under different hydrogen pressure and loading conditions.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 |
| 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 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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