| Autor: |
Lisak, M. V., Skal'skii, V. R., Ivanits'kii, Ya. L., Kovchik, S. E., Sergienko, O. M. |
| Zdroj: |
Materials Science; March 1989, Vol. 25 Issue: 2 p193-195, 3p |
| Abstrakt: |
Acoustic-emission measurements have been made on crack initiation in growth at weldbase metal boundaries in the materials used for oil hydrocracking reactor vessels. Tests have been made on cylindrical specimens 80 m in diameter and 45 mm high having welded protective layers 7–8 mm thick at one end, which have been kept for 24 h in a medium whose parameters were close to working ones. When the specimens had been cooled to room temperature, cracking occurred, which could be detected for 30 h. The mechanisms of cracking at the weld-base metal boundary are discussed. There are time differences in the acoustic emission activity for specimens with and without welds. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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