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

• Autorzy: Matocha K.
• 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: [phone], fax: [phone],

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.
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• [6] Small Punch Test Method for Metallic Materials, CEN Workshop Agreement CWA 15627, December 2007.
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• [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.
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