Acta Univ. Agric. Silvic. Mendelianae Brun. 2015, 63(5), 1549-1554 | DOI: 10.11118/actaun201563051549

Influence of Hardened Surface on Low Cycle Fatigue Characteristics at Tension-compression and Bending

Artūras Sabaliauskas1, Sergėjus Rimovskis1, Petr Dostál2
1 Mechanical Engineering Department, Šiauliai University, Vilniaus g. 88, 76285 Šiauliai, Litva
2 Department of Technology and Automobile Transport, Faculty of Agronomy, Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

This paper analyses electromechanical hardening of the steel parts surface, when in the contact area so called "white layer" is formed. The experiments were performed to show the influence of "white layer" on strength of the steel C45 specimens under low cycle loading. This paper analyses monotonic and low cycle tension compression and pure bending characteristics of specimens with electromechanically hardened surface. The Performed experiments showed that under monotonic tension strength characteristics (σpr, σ02, σu) are increasing and strain characteristics (eu, ψ) are decreasing. During cyclic stress limited tension compression at low loading levels both the width of plastic strain hysteresis loop and accumulated plastic strain are decreasing, therefore the lifetime is increasing. Under pure bending this tendencies persist, but in this case the lifetime at all loading levels is larger than the lifetime at tension compression.

Keywords: low cycle fatigue, pure bending, electromechanical treatment
Grants and funding:

The research has been supported by the project TP 4/2014 "Analysis of degradation processes of modern materials used in agricultural technology" financed by IGA AF MENDELU.

Prepublished online: October 29, 2015; Published: December 1, 2015  Show citation

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Sabaliauskas, A., Rimovskis, S., & Dostál, P. (2015). Influence of Hardened Surface on Low Cycle Fatigue Characteristics at Tension-compression and Bending. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 63(5), 1549-1554. doi: 10.11118/actaun201563051549
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