The quantitative method of evaluating the parameters of tear dimples and their conglomerates was proposed with examination of their fractographic images. The method is based on calculating the correlation coefficient distribution field of pixel intensity for compatible image areas. The 17G1S-U steel specimen fractograms produced with a REM-106I scanning electron microscope were studied. The zones of large tear dimples are shown to be characterized by strong correlation of brightness of compatible areas, which provides applying the advanced method for their detection and examination. The interrelation between image-assisted calculated dimple parameters with physicomechanical characteristics of the material was established.
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Translated from Problemy Prochnosti, No. 6, pp. 68 – 79, November – December, 2019.
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Marushchak, P.O., Konovalenk, I.V. & Chausov, M.G. Effect of Shock and Vibration Preloading on the Parameters of Tear Dimples and their Conglomerates. Strength Mater (2020). https://doi.org/10.1007/s11223-020-00137-2
- fractographic images
- tear dimples
- coefficient of roundness