Laser-Ultrasonic Study of Residual Stresses in Pipes Made of Austenitic Steel

Autor:	D. N. Shishulin, V. A. Simonova, Elena V. Savateeva, A. N. Zharinov, Alexander A. Karabutov, E.A. Mironova, S. N. Pichkov
Rok vydání:	2019
Předmět:	010302 applied physics Materials science Acoustics and Ultrasonics Ultrasonic testing Nucleation Residual 01 natural sciences Thermoelastic damping Residual stress 0103 physical sciences Acoustoelastic effect Ultrasonic sensor Composite material 010301 acoustics Beam (structure)
Zdroj:	Acoustical Physics. 65:307-315
ISSN:	1562-6865 1063-7710
DOI:	10.1134/s1063771019030114
Popis:	The paper discusses an acoustoelastic study of residual stresses and related structural changes in thin-walled austenitic steel pipes. A probing ultrasonic (US) beam is formed owing to the thermoelastic effect by absorption of a laser pulse in an optoacoustic transducer. Normal and oblique incidence (at an angle close to critical) of the US beam was used on the studied. Distribution maps of US velocity variations over the object’s surface and the volume structural inhomogeneities inside the metal were plotted. Estimates are presented for the residual stresses in the sample under nonstationary thermal loading. The coincidence between the residual stress distribution, structural inhomogeneities of the metal, and distribution of thermal loading sources is established. The possibility of estimating the residual life and finding of macrocrack nucleation centers is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3dcb15c7a2a60e99880068833be3102c https://doi.org/10.1134/s1063771019030114 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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