首页|Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens
Fracture surface topography investigation and fatigue life assessment of notched austenitic steel specimens
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NSTL
Elsevier
? 2022 The Author(s)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.
Austenitic stainless steelFatigue life estimationFractographic analysisFracture surface analysisNotched specimen
Macek W.、Robak G.、Zak K.、Branco R.
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Gdańsk University of Technology Faculty of Mechanical Engineering and Ship Technology
Opole University of Technology Faculty of Mechanical Engineering
CEMMPRE Department of Mechanical Engineering University of Coimbra Rua Luís Reis Santos Pinhal de Marrocos
NSTL
Elsevier
