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Studies on Fatigue Crack Growth Rate in Heat-Resistant Nickel Alloys

Authors
  • Ryzhkov, P. V.1
  • Khodinev, I. A.1
  • Monin, S. A.1
  • 1 All-Russian Scientific Research Institute of Aviation Materials (VIAM), Moscow, 105005, Russia , Moscow (Russia)
Type
Published Article
Journal
Inorganic Materials: Applied Research
Publisher
Pleiades Publishing
Publication Date
Nov 01, 2021
Volume
12
Issue
6
Pages
1499–1510
Identifiers
DOI: 10.1134/S2075113321060198
Source
Springer Nature
Keywords
Disciplines
  • Metal Sciences. Metallurgy
License
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Abstract

AbstractThe results of testing for the FCGR (fatigue crack growth rate) in compact samples upon eccentric tension using a crack opening displacement (COD) under the conditions of an asymmetric loading cycle (R = 0.1) at a room and elevated temperature are presented. The relationship between the conditions of force loading and the conditions of preliminary initial fatigue crack growth is considered. The values of effective stress intensity factor Keff have been obtained, being an important estimate for the interpretation of observed crack growth features. The properties of the cyclic crack resistance of the VZh175-ID alloy are compared with the properties of such foreign analogs as Rene 88DT and Inconel 625 SLM and such domestic analogs as EP741NP and EK151-ID. The effect of testing temperature on the growth rate is demonstrated. The hypothesis of the linear dependence of the parameters of the Paris equation has been verified.

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