作者： Peter Starke , Frank Walther , Dietmar Eifler
DOI:
关键词: Structural engineering 、 Engineering 、 Electrical resistance and conductance 、 Measurement method 、 Hysteresis 、 Constant (mathematics) 、 Amplitude 、 Microstructure
摘要: Mechanical stress-strain hysteresis, temperature and electrical resistance measurements were performed for the detailed characterisation of fatigue behaviour railway wheel steel SAE 1050 quenched tempered 4140, both used in sets. Stress-controlled load increase constant amplitude tests carried out at ambient on servohydraulic testing systems, The applied measurement methods depend deformation-induced changes microstructure bulk material represent actual state. On basis experimental data determined one test two life calculation method "PHYBAL" was developed. Woehler (S-N) curves calculated with only three agree very well conventional experimentally ones. microstructural done by scanning electron microscopy, allowing to interpret measured physical details.