Abstract
A533B and C - Mn steels, widely used as nuclear pressure vessel steels, have been aged at 520 degrees C after tempering at 650 degrees C for various periods of time to produce different levels of embrittlement resulting from the segregation of P to grain boundaries. Metallographic observation and tensile test results showed that the embrittlement heat treatment did not have significant influence on the microstructures or tensile properties of the steels. P segregation at grain boundaries and on intergranular facets was investigated using field emission gun transmission electron microscopy and Auger electron spectroscopy. After such treatment, enhanced segregation was found to be a linear function of the square root of embrittling time. Statistical analysis of the AES measurements indicated that there is a minimum segregation level for intergranular fracture to occur.
| Original language | English |
|---|---|
| Pages (from-to) | 1262-1268 |
| Number of pages | 7 |
| Journal | Materials Science and Technology |
| Volume | 23 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1 Nov 2007 |
Keywords
- statistical analysis
- steel
- fracture
- embrittlement
- segregation of impurities
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Dive into the research topics of 'Statistical analysis of phosphorus segregation on intergranular fracture facets in pressure vessel steels'. Together they form a unique fingerprint.Projects
- 1 Finished
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Platform : Fracture, Fatigue and Durability of Advanced Alloys and Composites for High Performance Applications
Bowen, P. (Principal Investigator), Connolly, B. (Co-Investigator), Davenport, A. (Co-Investigator) & Knott, J. (Co-Investigator)
Engineering & Physical Science Research Council
1/09/05 → 28/02/11
Project: Research Councils
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