| Autor: |
GE Lucas, GR Odette, RD Klingensmith |
| Rok vydání: |
2009 |
| Předmět: |
|
| DOI: |
10.1520/stp16497s |
| Popis: |
Yield stress elevations (Δσ y ) in pressure vessel steels irradiated at intermediate flux and fluence systematically decreased with increasing temperature and decreasing copper and nickel content. Lower stress relief temperature also decreased Δσ y at bulk copper concentrations greater than about 0.3%. The dependence of Δσ y on irradiation temperature between 260 and 316°C increased with copper and nickel content and decreased with phosphorous content. When normalized by the average Δσ y , the fractional temperature dependence correlates with a simple empirical chemistry factor of copper and phosphorous. The correlation predicts data on the irradiation temperature dependence of Δσ y found in the literature within a standard error of about 0.3 MPa/°C and is consistent with current understanding of hardening mechanisms. However, questions remain about the effects at very low flux and finer scale variations over smaller temperature intervals. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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