Improvement of the Mechanical Characteristics, Hydrogen Crack Resistance and Durability of Turbine Rotor Steels Welded Joints

Alexander I. Balitskii (), Vitaly V. Dmytryk, Lyubomir M. Ivaskevich, Olexiy A. Balitskii, Alyona V. Glushko, Lev B. Medovar, Karol F. Abramek, Ganna P. Stovpchenko, Jacek J. Eliasz and Marcin A. Krolikowski
Additional contact information
Alexander I. Balitskii: Department of Strength of the Materials and Structures in Hydrogen-Containing Environments, Karpenko Physico-Mechanical Institute, National Academy of Sciences of Ukraine, 79-601 Lviv, Ukraine
Vitaly V. Dmytryk: Welding Department, National Technical University «Kharkiv Polytechnic Institute», 61-000 Kharkiv, Ukraine
Lyubomir M. Ivaskevich: Department of Strength of the Materials and Structures in Hydrogen-Containing Environments, Karpenko Physico-Mechanical Institute, National Academy of Sciences of Ukraine, 79-601 Lviv, Ukraine
Olexiy A. Balitskii: Adolphe Merkle Institute, University of Fribourg, Chemin Des Verdiers 4, 1700 Friborg, Switzerland
Alyona V. Glushko: Welding Department, National Technical University «Kharkiv Polytechnic Institute», 61-000 Kharkiv, Ukraine
Lev B. Medovar: Department of Physical and Metallurgical Problems Electroslag Technologies, E.O. Paton Electric Welding Institute, National Academy of Sciences of Ukraine, 03-150 Kyiv, Ukraine
Karol F. Abramek: Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 70-310 Szczecin, Poland
Ganna P. Stovpchenko: Department of Physical and Metallurgical Problems Electroslag Technologies, E.O. Paton Electric Welding Institute, National Academy of Sciences of Ukraine, 03-150 Kyiv, Ukraine
Jacek J. Eliasz: Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 70-310 Szczecin, Poland
Marcin A. Krolikowski: Department of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 70-310 Szczecin, Poland

Energies, 2022, vol. 15, issue 16, 1-23

Abstract: This article is devoted to the following issues: calculating the values of temperatures obtained by simulating welding heating and the subsequent implementation of the welding process at the given mode parameters made it possible to obtain a welded joint of the rotor with an improved initial structure and increased mechanical properties, hydrogen resistance and durability by up to 10–15%; simulating welding heating in the areas of fusion, the overheating and normalization of the HAZ and the formation of austenite grains; specified welding heating creates the conditions for the formation of new products of austenite decomposition in the form of sorbitol in the area of the incomplete recrystallization of the HAZ. In air and gaseous hydrogen, the destruction of the combined joints took place on the weld metal, as well as on the fusion areas, the overheating and the incomplete recrystallization of the HAZ of 20H3NMFA steel as the base metal. Structural materials have a relatively low strength and high fracture toughness in air. This is manifested in a significant reduction in the elongation ( δ ), the area ( ψ ) and critical stress intensity factor ( K I c ) of welded joints and the endurance limit of cylindrical smooth rotor steel specimens, which were cut from transverse templates. Welded joints in the whole range of load amplitudes are sensitive to the action of hydrogen.

Keywords: turbine rotor; welded joint; hydrogen crack resistance; durability; overheating (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1996-1073/15/16/6006/pdf (application/pdf)
https://www.mdpi.com/1996-1073/15/16/6006/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:15:y:2022:i:16:p:6006-:d:892119

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().