Journal
MATERIALS
Volume 13, Issue 10, Pages -Publisher
MDPI
DOI: 10.3390/ma13102384
Keywords
mini-specimen; size effect; Weibull distribution; high-cycle fatigue; macro-fractography
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The study verifies the sensitivity of selected construction materials (S235JR structural steel and 1.4301 stainless steel) to the statistical size effect. The P-S-N curves were determined experimentally under high-cycle fatigue conditions for two specimen sizes (mini-specimen and standard specimen). The results were analyzed using a probabilistic model of the three-parameter Weibull cumulative distribution function. The analysis included the evaluation of the technological process effects on the results based on the material microstructure near the surface layer and the macro-fractography. The differences in the susceptibility to the size effect validated the applicability of the test method to mini-specimen and showed different populations of the distribution of critical material defects.
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