Crack propagation in a pipe steel subjected to cyclic loading after long-term operation

Autor:	V. N. Tikhomirov, M. R. Tyutin, B. R. Pavlovskiĭ, L. R. Botvina, V. G. Budueva, I. B. Oparina
Rok vydání:	2006
Předmět:	Stress (mechanics) Crack closure Amplitude Materials science Metals and Alloys Forensic engineering Fracture mechanics Composite material Power function Grain size Term (time) Exponential function
Zdroj:	Russian Metallurgy (Metally). 2006:329-336
ISSN:	1555-6255 0036-0295
DOI:	10.1134/s0036029506040094
Popis:	The mechanical properties (under static and cyclic loading) and damage of a product pipeline made of 3G steel have been studied after its long-term operation. The ultrasound velocity in a damaged steel and the fatigue crack length on the sample surface are determined at various stages of macrocrack initiation. At the stage of main-crack initiation, the cumulative curves of fatigue microcrack distribution are well described by both exponential and power functions, with their exponents decreasing with increasing stress amplitude. The majority of fatigue microcracks have a length close to the average grain size.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9ad8cb80cf0e30b992ade7d816d6d7ea https://doi.org/10.1134/s0036029506040094 Zobrazit plný text záznamu Full text from SpringerLink