Publication detail

CYCLIC LOW-THERMAL AGING OF DISSIMILAR AUSTENITIC STEEL WELDS USED IN NUCLEAR POWER PLANTS

MIKMEKOVÁ, Š. AMBROŽ, O. MRŇA, L. HRÁČEK, J. ŠEBESTOVÁ, H.

Original Title

CYCLIC LOW-THERMAL AGING OF DISSIMILAR AUSTENITIC STEEL WELDS USED IN NUCLEAR POWER PLANTS

Type

journal article in Web of Science

Language

English

Original Abstract

The nuclear power plants in Eastern Europe face problems with supplies of spare parts manufactured according to the same Russian standards as the originals. Therefore, the dissimilar welds of original Russian steel 08Ch18N10T and substitutive 1.4541 were made and analyzed to consider the possibility of original steel replacement during the repairs. Two different filler wires were applied. The welds were subjected to cyclic thermal loading corresponding to the actual operating conditions of a nuclear unit, and their microstructure and mechanical properties were compared to the as-welded joints. An increase in weld metal microhardness induced by aging was found when the filler with higher C and Cr content was used. Although this could indicate possible ferrite decomposition, the detected changes in mechanical properties corresponded to the changes in homogeneous welds of the original steel. The strength requirements for the steel used in nuclear power plant devices were still matched.

Keywords

dissimilar weld; austenitic steel; thermal aging; replacement; microstructure; mechanical properties; nuclear power plant

Authors

MIKMEKOVÁ, Š.; AMBROŽ, O.; MRŇA, L.; HRÁČEK, J.; ŠEBESTOVÁ, H.

Released

13. 12. 2024

Publisher

MM SCIENCE

Location

PRAGUE 10

ISBN

1803-1269

Periodical

MM Science Journal

Year of study

2024

Number

12

State

Czech Republic

Pages from

7868

Pages to

7874

Pages count

7

URL

https://www.mmscience.eu/journal/issues/december-2024/articles

BibTex

@article{BUT197247,
  author="MIKMEKOVÁ, Š. and AMBROŽ, O. and MRŇA, L. and HRÁČEK, J. and ŠEBESTOVÁ, H.",
  title="CYCLIC LOW-THERMAL AGING OF DISSIMILAR AUSTENITIC STEEL WELDS USED IN NUCLEAR POWER PLANTS",
  journal="MM Science Journal",
  year="2024",
  volume="2024",
  number="12",
  pages="7868--7874",
  doi="10.17973/MMSJ.2024\{_}12\{_}2024046",
  issn="1803-1269",
  url="https://www.mmscience.eu/journal/issues/december-2024/articles"
}