Izvorni znanstveni članak

Fatigue life of high strength steel for cold forming

R. Ulewicz ; Institute of Production Engineering, Czestochowa University of Technology, Czestochowa, Poland
F. Novy ; Faculty of Mechanical Engineering, University of Zilina, Slovak Republic

Sažetak

The article presents the results of fatigue tests carried out on STRENX-type high-strength cold forming steel. For high-cycle fatigue tests carried out using low cycle loading frequencies of around 30 Hz, a ROTOFLEX machine was used. For ultra high-cycle tests, a KAUP-ZU testing machine was employed, which enables fatigue tests to be performed with symetric specimen loading (R = -1) and at a frequency of f ≈ 20 kHz. The relationships σ_a = f(N) were determined experimentally in the high and ultra high-cycle region for STRENX high-strength steel. To determine the fatigue crack initiation mechanism, the fractographic analysis of fatigue fractures was made.

Ključne riječi

high strength steel; ultra-high-cycle fatigue; Wöhler curve; fractography

Hrčak ID:

168902

URI

https://hrcak.srce.hr/168902

Datum izdavanja:

2.1.2017.

Posjeta: 1.795 *