engleski

IDENTIFICATION OF LOW CYCLE FATIGUE PARAMETERS OF HIGH STRENGTH LOW-ALLOY (HSLA) STEEL AT ROOM TEMPERATURE

Low cycle fatigue test was performed in ambient atmosphere at room temperature. Cycle loading of material, in case of High strength low-alloy steel, entails modifications of its properties and in this paper is therefore shown behavior of fatigue life using low cycle fatigue parameters. More precisely, crack initiation life of tested specimens was computed using theory of Coffin- Manson relation during the fatigue loading. The deometry of the stabilized hysteresis loop of welded joint HSLA steel, marked as Nionikral 70, is also analyzed. This stabilized hysteresis loop is very important for determination of materials properties.

HSLA steel; mechanical properties; low cycle fatigue; fatigue life; material parameters

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