Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens - Publication - MOST Wiedzy

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Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens

Abstract

The objectives of this study were to investigate the fracture surface topography of X8CrNiS18-9 austenitic stainless-steel specimens for different loadings and notch radii and to supplement the knowledge about the fracture mechanisms for fatigue performance. Cases with three different values of the notch radius ρ and the stress amplitude σa were analysed. The fracture topographies were quantified by the areas over their entire surfaces with the aid of an optical confocal measurement system. The results showed a well-correlated root mean square height Sq and void volume Vv, identifying the characteristics of the entire fracture method. A fracture surface topography fatigue damage model was developed based on the product of the stress amplitude σa by the Sq to the Vv ratio. Overall, the predictions were close to the fatigue lives found in the experiments.

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Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
ENGINEERING FAILURE ANALYSIS no. 135,
ISSN: 1350-6307
Language:
English
Publication year:
2022
Bibliographic description:
Macek W., Robak G., Żak K., Branco R.: Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens// ENGINEERING FAILURE ANALYSIS -Vol. 135, (2022), s.106121-
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.engfailanal.2022.106121
Verified by:
Gdańsk University of Technology

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