Features of formation of structure and properties of Zr-1Nb alloy when manufacturing fuel element shell tubes

Authors

  • Georgiy Sukhomlin State Higher Educational Establishment «Prydniprovs’ka State Academy of Civil Engineering and Architecture» Chernyshevskogo str., 24a, Dnipro, Ukraine, 49600, Ukraine
  • Tatyana Dergach State Higher Educational Establishment «Prydniprovs’ka State Academy of Civil Engineering and Architecture» Chernyshevskogo str., 24a, Dnipro, Ukraine, 49600, Ukraine https://orcid.org/0000-0003-0235-5342

DOI:

https://doi.org/10.15587/2313-8416.2019.189283

Keywords:

zirconium alloy, ingot, tubes, fuel element shell, microstructure, special grain boundaries, properties

Abstract

Structure and properties of cast and hot-worked Zr-1Nb alloy and pilot batches of fuel element shell tubes for water-moderated water-cooled reactors (WWER 1000) of nuclear power plants manufactured from this alloy have been studied. It is shown that satisfactory processing ductility of hot-worked rolled tubes is formed during high-temperature extrusion at a high reduction rate. Presence of special grain boundaries in martensitic structures of Zr-1Nb alloy with a hexagonal close-packed lattice has been established for the first time in the theory of lattices of coinciding nodes. The fuel element shell tubes manufactured according to the developed technology are equal to foreign counterparts in terms of their basic quality characteristics

Author Biographies

Georgiy Sukhomlin, State Higher Educational Establishment «Prydniprovs’ka State Academy of Civil Engineering and Architecture» Chernyshevskogo str., 24a, Dnipro, Ukraine, 49600

Doctor of Technical Sciences, Professor

Department of Materials Science and Materials Processing

Tatyana Dergach, State Higher Educational Establishment «Prydniprovs’ka State Academy of Civil Engineering and Architecture» Chernyshevskogo str., 24a, Dnipro, Ukraine, 49600

Doctor of Technical Sciences

Department of Materials Science and Materials Processing

References

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Published

2019-12-28

Issue

No. 12 (2019)

Section

Technical Sciences

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Copyright (c) 2019 Georgiy Sukhomlin, Tatyana Dergach

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