Experimental determination of fatigue parameters of high chromium steel under different loading and temperature conditionsDrobne, Matej (Avtor) Gubeljak, Nenad (Avtor) Glodež, Srečko (Avtor) experimentshigh chromium steelhigh cycle fatiguefracture mechanicsFatigue investigation of high chromium steel (HCS) at different loading ratios (R = 0, R = -1) and different temperatures (20 °C, 600 °C) is presented in this paper. Before fatigue testing, monotonic mechanical properties (ultimate compressive and ultimate tensile strength) are determined at different temperatures, using standardized testing procedures according to DIN 50125 standard. Moreover Charpy impact tests at different temperatures were done with specimens that comply with the standard ISO 14556. Fatigue testing is performed on a servo - hydraulic testing machine with consideration of different loading conditions as described above. On the basis of the experimental results the S - N curves are constructed from which typical fatigue parameters (the fatigue strength coefficient 0'f and the fatigue strength exponent b) are determined. After fatigue testing a comprehensive investigation of fracture surfaces is performed using the Scanning Electron Microscope (SEM). Experimental results presented in this paper will serve as a basis for further investigations related to fatigue behaviour of real working rolls in hot strip mills made of HCS.20142017-07-12 08:15:07Znanstveno delo66812ISSN: 1330-3651UDK: 620.172.25:669.15'26OceCobissID: 15346181COBISS_ID: 18061590ISSN pri članku: 1330-3651NUK URN: URN:SI:UM:DK:RUKCQFK6sl