Fatigue testing by means of miniature test specimens

• Autorzy: Volak J. , Novak M. , Kaiser J. , Mentl V.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of the paper is to describe fatigue testing by means of miniature test specimens. Design/methodology/approach: Special miniature test specimens fixtures were designed and manufactured for the purposes of fatigue testing at the Zwick/Roell - Amsler 10HPF5100 test machine. The miniature test specimens were produced of the traditional test specimens. Seven different steels and an Al-alloy were fatigue loaded (R = 0.1) at room temperature. Findings: The paper describes the results of fatigue tests performed on miniature tests specimens in comparison with traditional fatigue tests for several steels (and one Al-alloy) applied in power producing industry. Research limitations/implications: At present, questions on quantitative evaluation of remaining lifetime become urgent and because fatigue is the most frequent cause of materials degradation and resulting structural components failures, the most important means of remaining lifetime assessment is the evaluation of fatigue properties before and after some time of service. Originality/value: The original material data are usually tested by means of classic test specimens, which can be hardly used in case of components in service, where there is no possibility to withdraw sufficient volume of representative material for the classic test specimen manufacturing. In such cases today, new modern methods of semi-destructive removal of a small volume of test material by grinding or an electro-discharge are utilized. This makes it possible to produce a miniature test specimens.

Słowa kluczowe

EN

fatigue testing

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 386--389
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Volak J.

• Research and Testing Inst. Ltd., Pilsen, Czech Republic

autor

Novak M.

• Research and Testing Inst. Ltd., Pilsen, Czech Republic

autor

Kaiser J.

• University of West Bohemia, Pilsen, Czech Republic

autor

Mentl V.

• University of West Bohemia, Pilsen, Czech Republic

Bibliografia

• [1] M.E. Fine, Y.W. Chung, Fatigue failure in metals, fatigue and fracture, ASM International Handbook Committee, Vol. 19, 1996.
• [2] V. Mentl, J. Volák, Comparison of fracture toughness values determined by standardized: method and small punch test, Proceedings of the 18th European Conference on Fracture „Fracture of Materials and Structures from Micro to Macro Scale“, Dresden, 2010, 126.
• [3] V. Mentl, M. Chocholoušek, J. Volák, P. Kindelmann, Korelace únavových charakteristik ocelí pro energetiku mĕřených na klasických a miniaturních zkušebních tĕlesech, Proceeding of the Conference “Zvyšování životnosti komponent energetických zařizeni v elektrárnách“, Srni, 2009 (in Czech).
• [4] J. Volák, V. Mentl, A Comparison of fatigue characteristics of structural steels measured by means of classic and miniature test samples, The Ninth International Conference on Multiaxial Fatigue and Fracture, Parma, 2010.