Fatigue strength of wheathering steel ATMOFIX 52A

0373586 - ÚFM 2012 RIV CZ eng K - Konferenční příspěvek (tuzemská konf.)
Kunz, Ludvík - Vlk, M. - Zavadilová, Petra - Klusák, Jan - Navrátilová, L.
Fatigue strength of wheathering steel ATMOFIX 52A.
Applied Mechanics 2011 - Conference Proceedings. Brno: Ústav fyziky materiálů, AV ČR, v.v.i, 2011 - (Náhlík, L.; Zouhar, M.; Ševčík, M.; Seitl, S.; Majer, Z.), s. 127-130. ISBN 978-80-87434-03-1.
[Applied Mechanics 2011. Velké Bílovice (CZ), 18.04.2011-20.04.2011]
Výzkumný záměr: CEZ:AV0Z20410507
Klíčová slova: weathering steel * ATMOFIX * fatigue
Kód oboru RIV: JG - Hutnictví, kovové materiály

Deterioration of fatigue properties of weathering steels is a serious problem of operating life of engineering components subjected to corrosion and cyclic loads. There are two possible mechanisms of damage, which are discussed in literature. There is an effect of surface roughening, which develops during corrosion, and an effect of corrosion cracks, which can influence the fatigue crack initiation. The paper contains results of an experimental determination of fatigue life of ATMOFIX 52A grade steel with a corroded surface and comparison with the fatigue strength of basic smooth material. The notch effect of corrosion dimples, which initiated fatigue cracks, was determined on the basis of fractographic observation and numerical evaluation of stress concentration. It has been found that the reduction of the fatigue life can be quantitatively well predicted by means of the fatigue notch effect of corrosion dimples. No risky corrosion cracks were found in the studied corroded material
Trvalý link: http://hdl.handle.net/11104/0206669