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

The 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...

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Bibliographic Details
Published in:Inorganic materials : applied research 2021-11, Vol.12 (6), p.1499-1510
Main Authors: Ryzhkov, P. V., Khodinev, I. A., Monin, S. A.
Format: Article
Language:English
Subjects:
Analogs
Chemistry
Chemistry and Materials Science
Crack opening displacement
Crack propagation
Fatigue failure
Fatigue tests
Fracture mechanics
Heat resistant alloys
Heat treating
High temperature
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Metal Sciences. Metallurgy
Stress intensity factors
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Summary:The 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 K eff 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.
ISSN:2075-1133
2075-115X
DOI:10.1134/S2075113321060198