In situ observation of fatigue crack retardation in banded ferrite–pearlite microstructure due to crack branching

This paper reports the results of in situ observation of fatigue crack growth in a ferrite–pearlite steel. Stress intensity factor range (Δ K) decreasing/increasing and constant-Δ K fatigue tests have been carried out. In banded pearlite orientation, intense crack branching was observed which leads...

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Veröffentlicht in:	Scripta materialia 2006-06, Vol.54 (11), p.1835-1840
Hauptverfasser:	Korda, Akhmad A., Mutoh, Y., Miyashita, Y., Sadasue, T., Mannan, S.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Crack branching Crack propagation Cracks Exact sciences and technology Fatigue Fatigue failure Fatigue tests Fracture mechanics Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology Metals. Metallurgy Microstructure Pearlite Pearlitic steel Scanning electron microscopy (SEM) Steels
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Beschreibung
Zusammenfassung:	This paper reports the results of in situ observation of fatigue crack growth in a ferrite–pearlite steel. Stress intensity factor range (Δ K) decreasing/increasing and constant-Δ K fatigue tests have been carried out. In banded pearlite orientation, intense crack branching was observed which leads to fatigue crack retardation. Crack closure during the test was monitored to understand the fatigue crack growth behaviour.
ISSN:	1359-6462 0956-716X 1872-8456
DOI:	10.1016/j.scriptamat.2006.02.025