Very high cycle fatigue behavior of shot-peened 3Cr13 high strength spring steel

Nie, Baohua; Zhang, Zheng; Zhang, Zhao; Zhong, Qunpeng

doi:10.1016/j.matdes.2013.03.039

Cited by 36 publications

(21 citation statements)

References 22 publications

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“…That is why, among others reasons, different surface thermal or mechanical treatments are suggested to improve the HCF strength of components . In VHCF regime, the influence of residual stresses on the fatigue strength is not obvious because crack initiation does not usually occur at the surface, especially for high strength steels under axial loading …”

Section: Effect Of Microstructural and Mechanical Features On The Vhcmentioning

confidence: 99%

A review about the effects of structural and operational factors on the gigacycle fatigue of steels

Jeddi

Palin‐Luc

2018

Fatigue Fract Eng Mat Struct

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It is well‐known that the high cycle fatigue (HCF) strength of steel components is influenced by a lot of factors depending on both material, loading (including environment), specimen or component geometry (design), and manufacturing process. Based on a literature review of a lot of experimental data, a synthesis is proposed in this paper to discuss the effect of the structural and operational factors on the very high cycle fatigue (VHCF) characteristics of steels. HCF and VHCF regimes are distinguished in terms of failure mechanisms and S‐N curve shapes for high and low strength steels. Then, the effect of the microstructural and mechanical features on the VHCF resistance is debated as different parameters (microstructure, inclusion size type and depth, hydrogen, environment, maximum tensile strength, and residual stresses). Next, the influence of the loading conditions is addressed by taking into account both the frequency effect, the highly stressed volume, the loading type, and loading ratio. Finally, the influence of the testing techniques used in VHCF experiments is discussed.

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Section: Effect Of Microstructural and Mechanical Features On The Vhcmentioning

confidence: 99%

A review about the effects of structural and operational factors on the gigacycle fatigue of steels

Jeddi

Palin‐Luc

2018

Fatigue Fract Eng Mat Struct

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“…In ultrasonic fatigue with a mean load equal to zero (R = −1), only the tensile part of the cycle has a predominant effect on the fatigue crack propagation [24]. Thus, ΔKFGA is calculated by substituting σa into Equation (1) instead of Δσ.…”

Section: Effect Of Basketweave On Fatigue Fracture Mechanismmentioning

confidence: 99%

“…The alloy with basketweave of 60 μm and 40 μm have the same of ΔKFGA value, which has a scattering zone ranging from 3.8 MPa•m 1/2 to 4.5 MPa•m 1/2 (Figure 8), and can be considered as the threshold for the crack growth ΔKth [24]. Zhao et al [25] supposed that the growth of FGA was restricted by the related microstructure, and the FGA crack cannot propagate when the plastic zone size ahead of the FGA crack tip is equal to the characteristic dimension of the materials.…”

Section: Effect Of Basketweave On Fatigue Fracture Mechanismmentioning

confidence: 99%

Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy

Nie

Zhang

Chen

et al. 2018

Metals

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This paper discusses the effect of basketweave microstructure on the very high cycle fatigue behavior of TC21 titanium alloy. Ultrasonic fatigue tests at 20 kHz are done on a very high cycle fatigue (VHCF) property of the alloys with 60 µm and 40 µm basketweave size, respectively. Results show that the alloys illustrate step-wise S-N characteristics over the 10 5 -10 9 cycle regimes and that fatigue fracture in both of the alloys occur beyond the conventional fatigue limit of 10 7 cycles. Subsurface crack initiation occurs at low stress amplitude. A fine granular area (FGA) is observed along the α lamella at the subsurface crack initiation site. The mechanism for the subsurface crack initiation is revealed using layer-by-layer-polishing, due to the micro-voids that are introduced at the granular α phase. The colony of α lamella is due to the local stress concentrated between them under the cyclic load. The stress intensity factor range at the FGA front is regarded as the threshold value controlling the internal crack propagation. Furthermore, the effect of the baseketweave size on the very high cycle fatigue limits of the TC21 titanium alloy is evaluated based on the Murakami model, which is consistent with the experimental results. The fatigue life of TC21 titanium alloy is well predicted using the energy-based crack nucleation life model.

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“…In the case of spring steels, the emphasis in materials research is focused on increasing the strength while maintaining good ductility, toughness and fatigue properties [4,7,8]. Over the last decades considerable efforts have been made to develop high strength spring steels to meet the needs for weight and cost savings in the automotive industry [9].…”

Section: Introductionmentioning

confidence: 99%

Improving properties of spring steel through nano-particles alloying

Podgornik

Torkar

Burja

et al. 2015

Materials Science and Engineering: A

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Very high cycle fatigue behavior of shot-peened 3Cr13 high strength spring steel

Cited by 36 publications

References 22 publications

A review about the effects of structural and operational factors on the gigacycle fatigue of steels

A review about the effects of structural and operational factors on the gigacycle fatigue of steels

Effect of Basketweave Microstructure on Very High Cycle Fatigue Behavior of TC21 Titanium Alloy

Improving properties of spring steel through nano-particles alloying

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