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Role of Compactness on Hardness and Reduced Modulus of Vaterite Determined with Nanoindentation Read chapter Read first chapter

2019 | OriginalPaper | Chapter

Influence of Residual Stresses in the Cladding Zones of RPV WWER-1000 on Integrity Assessment

Authors : Oleh Makhnenko, Elena Kostenevich

Published in: Proceedings of the Second International Conference on Theoretical, Applied and Experimental Mechanics

Publisher: Springer International Publishing

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Abstract

One of the current problems of the structural integrity assessment of the reactor pressure vessel WWER-1000 is the determination of resistance to brittle fracture taking into account the residual stresses after cladding of the protective anticorrosion layer and heat treatment. Existing data on the residual stresses do not take into account possible microstructural transformations in the base material steel 2.5Cr-Mo-V (15H2NMFA). Mathematical modeling of residual stresses taking into account microstructural phase transformations determines a compression stress area in the heat affected zone of the base material as result of martensite formation. These results were confirmed by dilatometric analysis and metallography of the steel 15H2NMFA templates. The evaluation of resistance to brittle fracture under the thermal shock load showed, that calculated compression residual stresses in the base material HAZ reduce value SIF for cracks of a depth up to 7 mm.

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Metadata
Title
Influence of Residual Stresses in the Cladding Zones of RPV WWER-1000 on Integrity Assessment
Authors
Oleh Makhnenko
Elena Kostenevich
Copyright Year
2019
Book
Proceedings of the Second International Conference on Theoretical, Applied and Experimental Mechanics

Print ISBN: 978-3-030-21893-5

Electronic ISBN: 978-3-030-21894-2

Copyright Year: 2019

DOI
https://doi.org/10.1007/978-3-030-21894-2_62

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