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HIGH AND ULTRA ? HIGH CYCLE FATIGUE OF C55 HIGH GRADE CARBON STEEL

Journal: Applied Engineering Letters (Vol.1, No. 4)

Publication Date:

Authors : ; ; ; ; ; ;

Page : 111-114

Keywords : C55; High grade carbon steel; high-frequency loading; surface fatigue crack initiation; ultra-high cycle fatigue;

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Abstract

Article provides experimental results in the field of ultra-high cycle fatigue behaviour of C55 high grade carbon steel obtained at high-frequency loading (f ? 20 kHz, T = 20 ± 10 °C, R = -1). The results confirm a continuous decrease of fatigue lifetime beyond the conventional fatigue limit. Fatigue fracture surfaces were characterized by surface fatigue crack initiation in both high and ultra-high cycle region, what means that that influence of microstructure defects was not significant enough to cause the sub-surface crack initiation.

Last modified: 2017-02-09 04:01:23