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Purpose: The purpose of the paper is to characterize the low cycle fatigue of high - chromium martensitic GX12CrMoVNbN9-1 cast steel from the perspective of the strain and energy criterion. Design/methodology/approach: The tests of fatigue strength within the scope of small amount of cycles to failure at room temperature and elevated temperature (400, 550 and 600°C) were carried out on GX12CrMoVNbN9-1 cast steel. The fatigue tests were run for five assumed levels of controlled amplitude of total strain εac (0.25; 0.30; 0.35; 0.50 and 0.60%). The loading applied in the experiment oscillated sinusoidally with the stress ratio R = -1 and frequency f = 0.2 Hz. The fatigue tests were performed by means of Instron 8501 hydropulser. Tests pieces for the fatigue tests were round and threaded. Findings: The examined cast steel during low cycle fatigue is subject to intense weakening. The period of stabilization was not revealed during the cyclic loading of the cast steel, neither at room temperature, nor elevated one. Moreover, it has been proved that the extent of changes in the cyclic properties is influenced by the level of strain and temperature. Practical implications: Obtained results of the tests are indispensable for the formulation of necessary characteristics of high-temperature creep resisting steels and cast steels. Originality/value: The paper presents the fatigue characteristics of GX12CrMoVNbN9-1 cast steel within the scope of small amount of cycles to failure. The fatigue characteristics of the examined cast steel was developed for both: room temperature and elevated temperature - 400, 550 and 600°C. Fatigue life of the investigated cast steel was described using the equations of Ramberg-Osgood and Manson-Coffin-Basquin, and presented from the perspective of the energy criterion.
Słowa kluczowe
Wydawca
Rocznik
Tom
Strony
7--16
Opis fizyczny
Bibliogr. 17 poz., rys., tab.
Twórcy
autor
- Faculty of Mechanical Engineering, University of Technology and Life Sciences in Bygdoszcz, ul. Prof. Kaliskiego 7, 85-796 Bydgoszcz, Poland
autor
- Institute of Materials Engineering, Czestochowa University of Technology, Al. Armii Krajowej 19, 42-200 Czestochowa, Poland
Bibliografia
- [1] A. Czyrska-Filemonowicz, A. Zielińska-Lipiec, P.J. Ennis, Modified 9%Cr steels for advanced power generation: microstructure and properties, Journal of Achievements in Materials and Manufacturing Engineering 19/2 (2006) 43-48.
- [2] J. Dobrzański, A. Zieliński, M. Sroka, Microstructure, properties investigations and methodology of the state evaluation of T23 (2.25Cr-0.3Mo-1.6W-V-Nb) steel in boiler application, Journal of Achievements in Materials and Manufacturing Engineering 32/2 (2009) 142-153.
- [3] G. Golański, High chromium martensitic cast steels for power plant, Energetics XXI (2010) 58-61 (in Polish).
- [4] R. Hanus, Heavy steel casting components for power plants “mega-components” made of high Cr steels, Proceedings of the 9th Conference “Materials for Advanced Power Engineering”, Liege, 2010, 286-295.
- [5] J. Dobosiewicz, Investigations of thermal mechanical equipment in power engineer Vol. I, General information, Turbines and generators, Publishing House Biuro Gamma, Warsaw, 1998 (in Polish).
- [6] M. Cieśla, G. Junak, Low cycle characteristic of the latest, generation of creep-resistant martensitic steels and their welded joints, in: Materials and technology for Construction of Supercritical Boilers and Waste Plants (edited by Adam Hernas), SITPH Publication, Katowice, 2009, 378-399 (in Polish).
- [7] J. Okrajni, M. Cieśla, K. Mutwil, Power plant component life assessment, Materials Engineering 1 (2005) 15-20 (in Polish).
- [8] G. Golański, Effect of the heat treatment on the structure and properties of GX12CrMoVNbN9-1 cast steel, Archives of Materials Science and Engineering 46/2 (2010) 88-97.
- [9] G. Golański, Evolution of secondary phases in GX12CrMoVNbN9-1 cast steel after heat treatment, Archives of Materials Science and Engineering 48/1 (2011) 12-18.
- [10] G. Golański, K. Werner, S. Mroziński, Low cycle fatigue of GX12CrMoVNbN9-1 cast steel at room temperature, Advanced Materials Research 291-294 (2011) 1106-1109.
- [11] G. Golański, S. Mroziński, K. Werner, Low cycle fatigue of GX12CrMoVNbN9-1 cast steel, Archives of Materials Science and Engineering 47/1 (2011) 41-47.
- [12] D.M Li, K.W. Kim, C.S. Lee, Low cycle fatigue data evaluation for a high-strength spring steel, International Journal of Fatigue 19/8-9 (1997) 607-612.
- [13] G. Golański, S. Mroziński, Low cycle fatigue life of GX12CrMoVNbN9-1 cast steel, Energetics 10 (2011) 623627 (in Polish).
- [14] G. Golański, K. Werner, S. Mroziński, The influence of temperature on low-cycle properties of martensite cast steel, Proceedings of the 13th Conference of Fracture Mechanics, Opole, Mechanics 343/99 (2011) 88-90 (in Polish).
- [15] A. Fatemi, L. Yang, Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials, International Journal of Fatigue 20/1 (1998) 9-34.
- [16] G. Golański, S. Mroziński, Influence of temperature on the course of the strain energy accumulation in GX12CrMoVNbN9-1 cast steel under low cycle loading conditions, Materials Engineering (in print).
- [17] S. Mroziński, Stabilization of cyclic properties in metals and its influence on fatigue life, University of Technology and Life Sciences in Bygdoszcz, 2008 (in Polish).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-fada7e75-313c-411a-97dd-5e49008e7128