Bruchmechanische Untersuchungen für Komponenten des Wasserdampfkreislaufs einer HTR-Stromerzeugungsanlage
Bruchmechanische Untersuchungen für Komponenten des Wasserdampfkreislaufs einer HTR-Stromerzeugungsanlage
Investigations on the fracture mechanics behaviour of X10 NiCrAlTi 32 20 (Alloy 800) have been performed at temperatures of 550°C and 700°C. These investigations were part of the safety philosophy for the steam cycle of a power producing HTGR-plant. An emphasis was laid on the demonstration of the t...
Saved in:
Personal Name(s): | Rödig, Manfred |
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Pfaffelhuber, M. / Klomfass, Josef / Schubert, F. / Nickel, Hubertus | |
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Kernforschungsanlage Jülich GmbH, Zentralbiliothek, Verlag
1988
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Physical Description: |
[5], 50, [54] p. |
Document Type: |
Report Book |
Research Program: |
ohne Topic |
Series Title: |
Berichte der Kernforschungsanlage Jülich
2244 |
Link: |
OpenAccess |
Publikationsportal JuSER |
Investigations on the fracture mechanics behaviour of X10 NiCrAlTi 32 20 (Alloy 800) have been performed at temperatures of 550°C and 700°C. These investigations were part of the safety philosophy for the steam cycle of a power producing HTGR-plant. An emphasis was laid on the demonstration of the transferability of creep and fatigue crack growth laws. The fatigue crack growth data measured with several standard specimens are in good agreement. So it can be assumed, that a description of the fatigue crack growth by means of the linear-elastic aKI-parameter is valid. In addition an experiment was performed with a thick walled tube in four point bending, containing a non through wall circumferential crack. By several approximation methods a conservative estimation of the fatigue crack growth in this tube is possible. The creep crack growth in standard specimens is well described by the energy rate integral C*. The linear elastic description by means of KI gives a large scatter of data, hence KI seems not to be a valid parameter for the description of the creep crack growth. In thin walled heat exchanger tubes with circumferential cracks in tension, the fatigue crack growth very roughly can be described by means of the A KI-parameter. This is valid although the formal suppositions are not fulfilled. The failure stress for these tubes in tensile loading is described conservatively by means of the Battelle formula. |