Abstract
Wrought Alloy 600 and Alloy 182 weld metal were tested for stress corrosion crack initiation in a BWR test loop. For the tests a modified bolt loaded compact tension specimen was developed, in which a U-notch replaced the conventional crack notch. The stress state close to notches of various radii was analyzed. Specimens with various notch radii were loaded to the same displacement at the bolt. A few control specimens with conventional crack notches were included. In Alloy 600 there was very little crack initiation, if any. However, in Alloy 182 weld metal there was crack initiation in a considerable fraction of the tested specimens. Comparison to other data from the same project shows that materials which had high crack propagation rates also showed high susceptibility to crack initiation. The appearance of a few barely initiated cracks indicated that local chemical attack on weld dendrite boundaries was the major factor causing initiation of cracks in Alloy 182.
| Original language | English |
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| Title of host publication | Proceedings of the 6th International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors |
| Editors | Robert E. Gold, Edward P. Simonen |
| Publisher | Minerals, Metals and Materials Society |
| Pages | 379-386 |
| Number of pages | 8 |
| ISBN (Print) | 0873392582 |
| Publication status | Published - 1993 Dec 1 |
| Externally published | Yes |
| Event | Proceedings of the 6th International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors - San Diego, CA, USA Duration: 1993 Aug 1 → 1993 Aug 5 |
Conference
| Conference | Proceedings of the 6th International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water Reactors |
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| City | San Diego, CA, USA |
| Period | 1993/08/01 → 1993/08/05 |