High Cycle Fatigue Behavior of Cold Forging Die Steel

Ryuichiro Ebara; R. Nohara; Rintaro Ueji; A. Ogura; Y. Ishihara; S. Hamaya

doi:10.4028/www.scientific.net/KEM.417-418.225

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 417-418High Cycle Fatigue Behavior of Cold Forging Die...

High Cycle Fatigue Behavior of Cold Forging Die Steel

Abstract:

High cycle fatigue behavior of the representative cold forging die steel, YXR3 with Rockwell C scale hardness number of 60.0 is investigated. Axial fatigue strength of plane and notched bar specimens with stress concentration factor, Kt of 1.5, 2.0 and 2.5 is presented. The emphasis is placed upon the subsurface crack initiation observed on notched specimens failed at number of cycles over than 106 cycles. Crack initiation and propagation mode of cold forging die steel is discussed with respect to fracture surface morphology.

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Periodical:

Key Engineering Materials (Volumes 417-418)

Pages:

225-228

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.417-418.225

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Online since:

October 2009

Authors:

Ryuichiro Ebara, R. Nohara, Rintaro Ueji, A. Ogura, Y. Ishihara, S. Hamaya

Keywords:

Cold Forging Die Steel, Crack Initiation, Crack Propagation, Fatigue Notch Factor, High Cycle Fatigue Strength, Stress Concentration Factor (SCF)

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References

[1] R. Ebara, K. Takeda, Y. Ishibashi, A. Ogura, Y. Kondo and S. Hamaya: accepted for publication, Engineering Failure Analysis, Elsevier, (2008).

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[2] M. Shinohara et al.: J. Japan Soc. for Tech. of Plasticity, 22, pp.159-165, (1981).

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[3] R. Ebara,J. Katayama,S. Yamamoto,R. Ueji,M. Kawamura,A. Ogura,Y. Kondo, and S. Hamaya: Fatigue and Plasticity: From Mechanisms to Design, pp.257-264, edited by A. Galtier and G. Baudry, SF2M, (2008).

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[4] H. Kobayashi,R. Ebara,A. Ogura,Y. Kondo and S. Hamaya, Very High Cycle Fatigue, pp.19-22, TMS, 2007, edit. by J.E. Allison J.W. Jones J.M. Larsen and R.O. Ritchie, TMS, (2007).

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