Affiliation:
1. All-Russian Scientific Research Institute of Aviation Materials (FSUE VIAM)
Abstract
The results of tests on the FCGR (fatigue crack growth rate) of compact specimens of eccentric tension using a crack opening (COD) sensor under conditions of an asymmetric loading cycle R=0.1 at room and elevated temperatures are presented. The relationship between the conditions of force loading of preliminary growth of the initial fatigue crack is considered. The values of the effective stress intensity factor Keff were obtained, which is an important estimate for interpreting the observed character of crack growth. A comparison of the properties of the cyclic crack resistance of the VZh175-ID alloy with the properties of foreign analogues Rene 88DT, Inconel 625 SLM and domestic ones - EP741NP, EK151-ID is presented. The influence of the test temperature on the growth rate is shown. The hypothesis about the linear dependence of the parameters of the Paris equation is tested.
Reference18 articles.
1. Kablov E.N., Ospennikova, O.G., Lomberg, B.S., Sidorov, V.V., Prioritetnye napravleniya razvitiya tekhnologiy proizvodstva zharoprochnykh materialov dlya aviatsionnogo dvigatelestroyeniya [Priority areas of development of technologies for the production of heat-resistant materials for aircraft engine building], Problemy chernoy metallurgii i materialovedeniya, 2013, No 3, pp. 47-54.
2. Dowling, N.E., Mechanical Behavior of Materials, Pearson Education Limited, ISBN 10: 0273-76455-1.
3. Hudak Jr., S.J., The dependence of crack closure on fatigue loading variables, Mechanics of Closure, ASTM STP 982, 1987, pp. 121-138.
4. Kablov, E.N., Innovatsionnye razrabotki VIAM po realizatsii “Strategicheskikh napravlenii razvitiya materialov i tekhnologii ikh pererabotki na period do 2030 goda” [Innovate developments of the AllRussian Scientific Research Institute of Aviation Materials within the project “Strategic development of materials and technologies of their recycling until 2030”], Aviatsionnye materialy i tekhnologii, 2015, No 1, pp. 333, DOI: 10.18577/2071-9140-2015-0-1-3-33.
5. Gorbovets, M.A., Khodinev, I.A., Belyaev, M.S., Ryzhkov, P.V., Low-Cycle Fatigue of a VZh175 Nickel Super alloy during Asymmetric Loading, Russian Metallurgy (Metally), 2019, No 9, pp. 889-893.