FATIGUE TESTING OF MINIATURE TEST SPECIMENS AND CORRELATION OF THE RESULTS WITH THE STANDARD TEST SPECIMENS

1 MACH Josef
Co-authors:
1 MENTL Václav 1 VOLÁK Josef 1 BUNDA Zbyněk 1 ŠTĚPÁNEK Martin
Institution:
1 University of West Bohemia, Regional Technological Institute, Univerzitni 8, 306 14, Pilsen, Czech Republic, EU, machj@rti.zcu.cz
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
766-771
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
16 views / 6 downloads
Abstract

This paper deals with the correlation of the fatigue tests results obtained on standard and miniature test samples. The aim was to compare the fatigue properties (Wöhler curves) of the samples of 15CH2NMFA steel of different cut off CT/50 test specimens after fracture toughness tests. The advantage of the use of these miniature samples is the minimum volume of removed material necessary for the production of test samples. This makes it possible to check the components in service, e.g. pressure vessels, steam turbine casings and rotors, steam pipelines, and other components of power plants after some time of operation in order that the residual lifetime could be determined. The article discusses the design of tests samples and clamping fixtures, test conditions and resulting correlation of test results.

Keywords: Small fatigue test, SFT specimens, Miniature fatigue testing, Small punch testing, 15CH2NMFA
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