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Strength of Materials

, Volume 51, Issue 2, pp 202–213 | Cite as

Fracture Behavior of Single-Crystal Alloys Under Thermocyclic Loading

  • L. B. GetsovEmail author
  • A. S. Semenov
  • A. N. Grudinin
  • A. I. Rybnikov
Article
  • 7 Downloads

Experimental study results for thermal fatigue fracture of sand-glass specimens from a ZhS32 single-crystal alloy with different crystallographic orientations are presented over a wide range of maximum and minimum cycle temperature variations. Crystallographic, fractographic, and finite element data were used to identify crystallographic and noncrystallographic fracture modes of a single-crystal alloy. The noncrystallographic mode is realized at high maximum cycle temperatures and comparatively narrow temperature ranges. It is characterized by mode I crack growth. The crystallographic mode is realized at lower maximum temperatures and a wide range of cycle temperature variations. It is characterized by combined I–II mode crack growth in crystallographic plane {111}. The chart of fracture mechanisms in the maximum temperature-temperature range coordinates is proposed. The boundary between the regions permits of approximation, corresponding to the Arrhenius equation.

Keywords

single-crystal alloy thermal fatigue crystallographic and noncrystallographic fracture modes crack finite element simulation 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • L. B. Getsov
    • 1
    Email author
  • A. S. Semenov
    • 2
  • A. N. Grudinin
    • 2
  • A. I. Rybnikov
    • 1
  1. 1.Polzunov Power Equipment Research & Design Science & Technology AssociationSaint PetersburgRussia
  2. 2.Peter the Great Saint Petersburg State Polytechnic UniversitySaint PetersburgRussia

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