Giga-Cycle Fatigue Behavior of Notched Specimens for High Speed Steel

Ryuichiro Ebara; K. Nakamoto; A. Ogura; Y. Ishihara; S. Hamaya

doi:10.4028/www.scientific.net/KEM.452-453.749

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 452-453Giga-Cycle Fatigue Behavior of Notched Specimens...

Giga-Cycle Fatigue Behavior of Notched Specimens for High Speed Steel

Abstract:

Giga-cycle fatigue behavior of notched specimens with stress concentration factor, Kt of 1.5, 2.0 and 2.5 for 0.65 mass% carbon matrix high speed steel, YXR3 with Rockwell C scale hardness number of 60.7 is investigated. The higher the stress concentration factor the lower the giga-cycle fatigue strength is. The emphasis is placed upon the subsurface crack initiation observed on all notched specimens. Crack initiation mode of high speed steel is discussed with respect to fracture surface morphology.

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Periodical:

Key Engineering Materials (Volumes 452-453)

Pages:

749-752

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.452-453.749

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Online since:

November 2010

Authors:

Ryuichiro Ebara, K. Nakamoto, A. Ogura, Y. Ishihara, S. Hamaya

Keywords:

Giga-Cycle Fatigue, High Speed Steel, Notched Specimen, Stress Concentration Factor (K_t), Subsurface Crack Initiation

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References

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