Matej Drobne (Author), Nenad Gubeljak (Author), Srečko Glodež (Author)

Abstract

Fatigue 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.

Keywords

eksperimenti;visoko legirano kromovo jeklo;vidokociklično utrujanje;mehanika loma;experiments;high chromium steel;high cycle fatigue;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FS - Faculty of Mechanical Engineering
UDC: 620.172.25:669.15'26
COBISS: 18061590 Link will open in a new window
ISSN: 1330-3651
Views: 694
Downloads: 113
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Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Croatian
Secondary title: Eksperimentalno određivanje parametara zamornog ponašanja visokokromnog lijevanog čelika pri različitim režimima opterećivanja i temperature
Secondary abstract: U članku je razmatrano zamorno ponašanje visokokromnog lijevanog čelika za dva omjera minimalnog i maksimalnog opterećenja (R = 0, R = –1) te na dvije temperature ispitivanja (+20 °C, +600 °C). Mehaničke karakteristike materijala na vlak i tlak su određene za obje temperature na standardnim epruvetama u skladu s DIN 50125 standardom. Isto tako Charpy ispitivanja udarne žilavosti na različitim temperaturama urađene su u skladu s ISO 14556 standardom. Zamorna ispitivanja izvedena su na servohidrauličkoj kidalici za oba omjera opterećenja. Na osnovu eksperimentalnih rezultata dobivene su S – N krivulje s tipičnim parametrima zamaranja (koeficijent σf’ i eksponent zamorne čvrstoće b). Nakon zamornih ispitivanja na karateristike na tlak obavljen je pregled prijelomne površine pomoću elektronskog mikroskopa. Eksperimentalni rezultati predstavljeni u ovom radu su osnova za daljna istraživanja zamornog ponašanja valjaka iz HCS materijala za vruće valjanje čelika.
Secondary keywords: eksperimenti;visoko legirano kromovo jeklo;visokociklično utrujanje;mehanika loma;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 853-860
Volume: ǂVol. ǂ21
Issue: ǂno. ǂ4
Chronology: 2014
ID: 10847600