Metals (Feb 2023)

Effect of the Laser Cladding Parameters on the Crack Formation and Microstructure during Nickel Superalloy Gas Turbine Engines Repair

  • Anastasia Dmitrieva,
  • Olga Klimova-Korsmik,
  • Marina Gushchina,
  • Rudolf Korsmik,
  • Grigoriy Zadykyan,
  • Stepan Tukov

DOI
https://doi.org/10.3390/met13020393
Journal volume & issue
Vol. 13, no. 2
p. 393

Abstract

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Cracking of nickel superalloys with a high content of γ’-phase remains an unresolved problem, including in technologies for repairing gas turbine engines blades. Laser cladding is a method of material deposition used to repair parts exposed to aggressive environment and surface wear. Cladding parameters have a high influence on cracking susceptibility nickel superalloys. Alloy ZhS32 has a high propensity for hot cracking when exposed to laser radiation. In this work, the study of the structural and phase features of ZhS32 alloy was carried out. A high tendency to form segregation of refractory elements and carbides in the intergranular areas was found. The features of the structure and phase composition of the material for different cladding parameters were studied. The main contribution of technological parameters to the formation of cracks is shown.

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