Use of dynamic speckle interferometry for contactless diagnostics of fatigue crack initiation and determining its growth rate

A. P. Vladimirov; I. S. Kamantsev; V. E. Veselova; E. S. Gorkunov; S. V. Gladkovskii

doi:10.1134/S106378421604023X

Use of dynamic speckle interferometry for contactless diagnostics of fatigue crack initiation and determining its growth rate

Authors: Vladimirov A.P.¹, Kamantsev I.S.¹, Veselova V.E.¹, Gorkunov E.S.¹, Gladkovskii S.V.¹
Affiliations:
1. Institute of Engineering Science, Ural Branch
Issue: Vol 61, No 4 (2016)
Pages: 563-568
Section: Solid State
URL: https://journals.rcsi.science/1063-7842/article/view/197066
DOI: https://doi.org/10.1134/S106378421604023X
ID: 197066

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Abstract
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Abstract

Steel 09G2S specimens are subjected to cyclic tests, and real-time monitoring of the initiation of a fatigue crack and its growth kinetics is performed by dynamic speckle interferometry. The time averaging of speckles are used to reveal a relation between the parameters that characterize random and deterministic changes in the relief height and speckle images of the surface near the notch during crack initiation.