Crack initiation in steel parts working in boilers and steam pipelines

• Autorzy: Renowicz D. , Cieśla M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The purpose of this paper is to identify the influence of loading history and the processes of material degradation on the crack initiation and on durability under thermo-mechanical fatigue conditions. Design/methodology/approach: Based on the operation data, the conditions of laboratory examinations of specimens were determined. A specialist apparatus unit was used for the examination, enabling the simulation of any spectrum of mechanical load and temperature changes. Findings: The material durability criterion has been defined based on an energy related approach to the problem of crack initiation in steels which work under thermal fatigue conditions. Research limitations/implications: In the case discussed, i.e. a pipeline part, the present criteria should be expanded with critical values describing the total length of cracks initiated on the internal surface of a specimen. Practical implications: The paper refers to the research on steel 10H2M (10CrMo.910) used in the conventional boilers, superheaters and pipelines in power plants. Originality/value: Originality of the paper is the methodology of the lifetime prediction of steam pipeline parts working in thermo-mechanical fatigue conditions.

Słowa kluczowe

EN

fatigue; residual life analysis; fracture mechanics; properties of materials; properties of products

PL

zmęczenie; trwałość resztkowa; mechanika pękania; właściwości materiałów; właściwości produktów

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 21, nr 2
• Strony: 49--52
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Renowicz D.

autor

Cieśla M.

• Silesian University of Technology, ul. Krasinskiego 8, 40-019 Katowice, Poland,

Bibliografia

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