Fatigue behavior and short crack growth in ferritic-pearlitic-bainitic steel

0435323 - ÚFM 2015 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Polák, Jaroslav - Petrenec, Martin
Fatigue behavior and short crack growth in ferritic-pearlitic-bainitic steel.
3rd International Conference on Heterogeneous Material Mechanics (ICHMM 2011). Lancaster: Destech Publications, 2011 - (Fan, J.; Zhang, J.; Chen, H.; Jin, Z.), s. 857-860. Advances in Heterogeneous Materials Mechanics, 921-924. ISBN 978-1-60595-054-9.
[ICHMM 2011 International Conference on Heterogeneous Material Mechanics /3./. Shanghai (CN), 22.05.2011-26.05.2011]
Grant CEP: GA ČR GA101/07/1500; GA ČR GA106/08/1631
Výzkumný záměr: CEZ:AV0Z20410507
Institucionální podpora: RVO:68081723
Klíčová slova: fatigue life * cyclic plasticity * short crack * mean stress
Kód oboru RIV: JL - Únava materiálu a lomová mechanika

Fatigue behavior of ferritic-pearlitic-bainitic steel, in particular the initiation and short crack growth has been studied. Smooth cylindrical specimens and cylindrical specimens having a shallow notch were produced from a massive forging. Fatigue cracks initiate preferably in persistent slip markings in areas of proeutectoid ferrite. Fatigue cracks grow with a contribution of crack linkage. The kinetics of short crack growth has been described using the concept of an “equivalent crack”. The plastic strain amplitude plays a dominant role in crack initiation stage, in the growth of short cracks and in the fatigue life evaluation.
Trvalý link: http://hdl.handle.net/11104/0239483