A pragmatic approach to predict fatigue strength concerning the short crack behavior in VHCF

Sun, Kepeng; Sun, Qingchao; Zhang, Yingzhong; Shi, Baohui; Zhao, Binbin

doi:10.1016/j.ijfatigue.2020.105561

Cited by 5 publications

(3 citation statements)

References 40 publications

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“…Reported models for the access of VHCF strength of high-strength steels are based on inclusion sizes and assuming a Paris law for fatigue crack growth [18-21]. If the diameters of inclusions are constant, we can deduce that there is a power-law relationship between the stress amplitude and the number of cycles to failure from both Murakami's model and Tanaka and Akiniwa's model, as shown below [18,20,21], where A , b , C and m are constant and could be derived from fitting the fatigue parameters, .…”

Section: Discussionmentioning

confidence: 99%

“…It has been proved that the crack initiation in GBF area takes most of the fatigue life, especially at the high cycle regime over 10 8 and the ratio could be higher than 90% [18,19]. Thus, the fatigue life of GBF area could be substituted by the total fatigue life.…”

Section: Vhcf Properties Of Specimensmentioning

confidence: 99%

“…Several pragmatic approaches have been proposed to predict the fatigue strength of high-strength steels by taking into consideration of short crack behaviour in the VHCF regime [9,[17][18][19]]. Murakami's equation is a well-known prediction that enables the size effect to be taken into account [20].…”

Section: Introductionmentioning

confidence: 99%

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Very high cycle fatigue properties of 2000 MPa ultrahigh-strength steels

Zhu

et al. 2022

Materials Science and Technology

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The microstructure, mechanical properties and very high cycle fatigue (VHCF) properties of two 2000 MPa ultrahigh-strength martensitic steels were investigated. Results show that the newly developed steel possesses lower ultimate tensile strength but higher yield strength compared with the conventional steel, as well as a higher impact toughness and fracture toughness due to its better cleanliness and tempering at a higher temperature. Both steels experienced a typical VHCF fracture process. The newly developed steel had higher fatigue strength and longer fatigue life at the same stress amplitude compared with the conventional one, which could be related to its lower crack growth rate and better toughness.

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