Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel

Qian, Guian; Zhou, Chan; Hong, Youshi

doi:10.1016/j.actamat.2010.10.064

Cited by 65 publications

(76 citation statements)

References 27 publications

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“…In fact, there is a need for many engineering structures to endure long period of cyclic loading up to 10 10 cycles, such as aircrafts, automobiles, ship, railway, etc. [5]. Obviously, it is an important topic to clarify the behavior and mechanism of VHCF failures.…”

Section: Introductionmentioning

confidence: 99%

Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels

Lei

Hong

Xie

et al. 2012

Materials Science and Engineering: A

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a b s t r a c tFatigue tests with rotary bending (52.5 Hz) and ultrasonic cycling (20 kHz) methods were performed, respectively on two high strength steels so as to investigate the effects of inclusion size and location on the fatigue behavior from low cycle fatigue to very-high-cycle fatigue (VHCF) regimes. Under rotary bending test, four fracture patterns were observed with respect to different locations of inclusion on fracture surface. The mean crack growth rate within FGA (fine granular area of crack origin) was estimated to give the value with the magnitude of 10 -13 m/cycle for the specimens with the fracture pattern of ''FGA þ surface fisheye''. Under ultrasonic cycling test, the size effect of inclusions on VHCF was investigated with two groups of specimens. One is with the inclusion size between 20 and 60 mm and the other is with the inclusion size between 10 and 30 mm. The results show that large inclusions lowered the proportion of net FGA at given stress levels and led to the shortening of VHCF life. The degradation of VHCF strength caused by the increase of inclusion size is ascribed to the decrease of the critical stress of FGA formation for large inclusions.

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Section: Introductionmentioning

confidence: 99%

Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels

Lei

Hong

Xie

et al. 2012

Materials Science and Engineering: A

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“…Miller et al [6] also discussed the fatigue limit and methods for overcoming it. Therefore, some high strength CrMo steels with both good HCF performance and good corrosion fatigue performance [8,16,17] have been reported recently. Sakai et al [18] and Huang et al [19] previously reported on the HCF or VHCF issues of high carbon chromium bearing steel and low alloy chromium steel, respectively.…”

Section: Introductionmentioning

confidence: 99%

High-Cycle Microscopic Severe Corrosion Fatigue Behavior and Life Prediction of 25CrMo Steel Used in Railway Axles

Wang

et al. 2017

Metals

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Abstract:The effects of environmental media on the corrosion fatigue fracture behavior of 25CrMo steel were investigated. The media include air, and 3.5 wt % and 5.0 wt % NaCl solutions. Experimental results indicate that the media induces the initiation of corrosion fatigue cracks at multiple sites. The multi-cracking sites cause changes in the crack growth directions, the crack growth rate during the coupling action of the media, and the stress amplitude. The coupling effects are important for engineering applications and research. The probability and predictions of the corrosion fatigue characteristic life can be estimated using the three-parameter Weibull distribution function.

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“…However, the process of subsurface crack initiation and propagation is still not clear and there are few theoretical models developed to analyze the different crack initiation process [8,9,13,20]. Additionally, although there have been many studies on the factors those may affect VHCF propensity of high strength steels, such as environmental medium [14][15][16], loading frequency [17,18], microstructure state [19][20][21], etc. [5,8,12], the influence of notch effect has not been fully understood.…”

Section: Introductionmentioning

confidence: 99%

Investigation of high cycle and Very-High-Cycle Fatigue behaviors for a structural steel with smooth and notched specimens

Qian

Hong

Zhou

2010

Engineering Failure Analysis

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a b s t r a c tThe high cycle and Very-High-Cycle Fatigue (VHCF) properties of a structural steel with smooth and notched specimens were studied by employing a rotary bending machine with frequency of 52.5 Hz. For smooth specimens, VHCF failure did occur at fatigue cycles of 7.1 Â 10 8 with the related S-N curve of stepwise tendency. Scanning Electron Microscopy (SEM) was used for the observations of the fracture surfaces. It shows that for smooth specimens the crack origination is surface mode in the failure regime of less than 10 7 cycles. While at VHCF regime, the material failed from the nonmetallic inclusion lies in the interior of material, leading to the formation of fisheye pattern. The dimensions of crack initiation region were measured and discussed with respect to the number of cycles to failure. The mechanism analysis by means of low temperature fracture technique shows that the nonmetallic inclusion in the interior of specimen tends to debond from surrounding matrix and form a crack. The crack propagates and results to the final failure. The stress intensity factor and fatigue strength were calculated to investigate the crack initiation properties. VHCF study on the notched specimens shows that the obtained S-N curve decreases continuously. SEM analysis reveals that multiple crack origins are dominant on specimen surface and that fatigue crack tends to initiate from the surface of the specimen. Based on the fatigue tests and observations, a model of crack initiation was used to describe the transition of fatigue initiation site from subsurface to surface for smooth and notched specimens. The model reveals the influences of load, grain size, inclusion size and surface notch on the crack initiation transition.

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Experimental and theoretical investigation of environmental media on very-high-cycle fatigue behavior for a structural steel

Cited by 65 publications

References 27 publications

Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels

Effects of inclusion size and location on very-high-cycle fatigue behavior for high strength steels

High-Cycle Microscopic Severe Corrosion Fatigue Behavior and Life Prediction of 25CrMo Steel Used in Railway Axles

Investigation of high cycle and Very-High-Cycle Fatigue behaviors for a structural steel with smooth and notched specimens

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