| Autor: |
Mychailo B. Toloczko, Stephen M. Bruemmer, Ziqing Zhai |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
The Minerals, Metals & Materials Series ISBN: 9783030046385 |
| DOI: |
10.1007/978-3-030-04639-2_14 |
| Popis: |
SCC initiation results in simulated PWR primary have been obtained on one mill annealed alloy 600 plate heat in the cold-worked condition. Twelve specimens with similar cold work levels were tested at constant load and three showed much shorter SCC initiation times ( 1200 h). Post-test examinations revealed that these three specimens all feature an inhomogeneous microstructure where the primary crack always nucleated along the boundary of large elongated grains protruding normally into the gauge. In contrast, such microstructure was either not observed or did not extend deep enough into the gauge in the other specimens exhibiting ~3–7× longer initiation times. In order to better understand the role of this microstructural inhomogeneity in SCC initiation, high-resolution microscopy was performed to compare carbide morphology and strain distribution between the long grains and normal grains, and their potential effects on SCC initiation are discussed in this paper. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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