S-N fatigue behavior of Fe25Mn steel and its weld at 298 and 110 K

Sung, Hyokyung; Jeong, Daeho; Park, Taedong; Lee, Jongseop; Kim, Sangshik

doi:10.1007/s12540-016-6108-4

Cited by 18 publications

(1 citation statement)

References 28 publications

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“…It was therefore suggested that, the microstructural characteristics, as well as yield strength, may influence the HCF resistance of Ti64 specimen by affecting fatigue crack nucleation. The fatigue cracks in α + β Ti alloys tend to initiate in slip bands at the surface of large α grain in an early stage of fatigue life Sung et al 2016). Under an applied stress level close to fatigue limit, it has been reported that crack starts to form at the interface between α and β phases later in the fatigue life (Hines and Lütjering 1999).…”

Section: Methodsmentioning

confidence: 99%

High cycle fatigue and fatigue crack propagation behaviors of β-annealed Ti-6Al-4V alloy

Jeong

Kwon

Goto

et al. 2017

Int J Mech Mater Eng

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Background: The effect of β annealing on high cycle fatigue (HCF) and fatigue crack propagation (FCP) behaviors of Ti64 alloy were examined, and the results were compared to those of mill-annealed counterpart. Methods: The tensile tests, stress-controlled HCF tests, and FCP tests were conducted, and the fractographic and micrographic analyses were performed before and after the tests. Results: The β-annealed Ti64 specimen showed inferior HCF properties as compared to the mill-annealed counterpart, as a result of lower yield strength. On the other hand the resistance to FCP of β-annealed Ti64 specimen was higher than that of mill-annealed counterpart in low and intermediate ΔK regime. Conclusions: Relatively easy fatigue crack initiation at the colony boundaries of β-annealed Ti64 specimen reduce the resistance to HCF. The resistance to FCP of β-annealed Ti64 specimen increased significantly particularly in low ΔK regime along with severe crack branching and deflection.

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Section: Methodsmentioning

confidence: 99%