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http://yadda.icm.edu.pl:443/baztech/element/bwmeta1.element.baztech-article-BUJ5-0033-0072

Czasopismo

Journal of KONES

Tytuł artykułu

The evaluation of materials properties of inservice components by small punch tests

Autorzy Matocha, K. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Residual lifetimes and/or structural integrity assessments of critical components of mechanical plants and/or steel structures reąuire the knowledge of actual mechanical properties of the components' materials, because the material properties could be reduced throughout a service life by ageing. the use of standardised mechanical test techniques for determination of actual mechanical properties of the components under operation can cause its considerable damage due to size of necessary testing material and following repairs by welding. The need of a large amount of testing material can be eliminated by new advanced testing method based on „ non destructive " sampling of a small amount of testing material from the component surface. the mechanical characteristics are then determined by Small Punch) Tests (SPT). This paper describes the use of this advanced test technique for determination of tensile properties and fracture characteristics (FATT, J IC) of materials. The small punch test technique provides at present time a vehicle for determination of actual tensile and fracture properties necessary for optimisation of operating procedures and inspection intervals as well as for repairs strategies and residual lifetime assessment.
Słowa kluczowe
EN material properties   small punch test   material ageing   non destructive sampling   tensile and fracture properties  
Wydawca Łukasiewicz Research Network - Institute of Aviation
European Science Society of Powertrain and Transport KONES Poland
Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
Czasopismo Journal of KONES
Rocznik 2009
Tom Vol. 16, No. 4
Strony 315--321
Opis fizyczny Bibliogr. 15 poz., rys.
Twórcy
autor Matocha, K.
  • Material & Metallurgical Research, Ltd. Pohranićni 31, Ostrava, Czech Republic tel: +420 60 6750442, fax: +420 59 5953727, karel.matocha@mmvyzkum.cz
Bibliografia
[1] Small Punch Testing for Fracture Toughness Measurement, Final Report prepared for EPRI, TR-105130, Research Project 2426-38.
[2] Matocha, K., Purmenský, J., Determination of actual mechanical properties of power plant components by small specimen testing technique, KEMA Workshop Small Punch Testing, Arnhem 2005.
[3] Shah, P. K., Chatterjee, S., Measurement of Tensile and Fracture Toughness Propertie Using Small Punch Test, Proceeding of the International Conference & Exibition on Pressure Vessels and Piping OPE 2006-CHENNAI, Chennai, India 2006.
[4] Bicego, V., Lohr, R. D., Mechanical testing on miniature specimens by the small punch method, International Symposium on Materials Ageing and Life Management, Kalpakkam, India 2000.
[5] Onat, E. T., Haythornthwaite, R. M., The load-carrying capacity of circular plates at large deflection, Journal of Applied Mech., p. 46-55, 1956.
[6] Small Punch Test Method for Metallic Materials, CEN Workshop Agreement CWA 15627, December 2007.
[7] Ha, J. S., Fleury, E., Small punch tests to estimate the mechanical properties of steels for steam power plant: II. Fracture toughness, International Journal of Pressure Vessels and Piping, No. 75, pp. 707-713, 1998.
[8] Gai, X., Sato, Y. S., Kokawa, H., Ichikawa, K., Ductile – brittle transition of steel electron beam weld metal in small punch test, Science and Technology of Welding and Joining, Vol. 7, No. 4, p. 204, 2002.
[9] Purmenský, J., Matocha, K., Determination of long-term material properties degradation using small specimen testing, Proc. of 7th Informative and Training Symposium Diagnostic and Maintenance of Long Time Operated Power Equipment, Ustroń, Hotel Belweder, p. 97, 2005.
[10] Kander, L., Filip, M., Matocha, K., Purmenský, J., Hodnocení vlastností kotlového telesa z materiálu 11416.1 po dlouhodobém provozu metodou malých vzorku, Kotle a energetická zarízení, Brno, 2006.
[11] Filip, M., Stanovení mechanických vlastností a FATT z odlitku VT RZV-RV1 z materiálu 422740.6. Zpráva VÍTKOVICE-Výzkum a vývoj, spol. s r.o., T-46/2006, Ostrava, Prosinec 2006.
[12] Matocha, K., Filip, M., Purmenský, J., Kander, L., Measurement of Tensile and Fracture Toughness Properties of Material Samples Taken from Steam Turbine Rotor in Lodž Power Plant Using Small Punch Test. Report of VÍTKOVICE-Researchand Development, Ltd., T-24/2006, September 2006.
[13] Mao, X., Saito, M., Takahashi, H., Small Punch Test to Predict Ductile Fracture Toughness JIC and Brittle Fracture Toughness KIC, Scripta Metallurgica et Materialia, Vol. 25, No. 1 1, pp. 2481-2485, 1991.
[14] Misawa, T., Nagata, S., Aoki, N., Ishizaka, J., Hamaguchi, Y., Fracture Toughness Evaluation of Fusion Reactor Structural Steels at Low Temperatures by Small Punch Tests, Journal of Nuclear Materials, Vol. 169, pp. 225-232, 1989.
[15] Mao, X., Shoji, T., Takahashi, H., Characterization of Fracture Behaviour in Small Punch Test by Combined Recrystallization-Etch Method and Rigid Plastic Analysis, J. Testing and Evaluation, Vol. 15, p. 30, 1987.
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