A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks

Kong, Yu Sik; Bennett, Chris; Hyde, Chris

doi:10.1016/j.matdes.2020.109093

Cited by 52 publications

(14 citation statements)

References 163 publications

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“…Nondestructive techniques have been widely used to monitor fatigue cracks. In a comprehensive review prepared by Kong et al [ 38 ], the eddy current method was found to be as promising and more sensitive than many other techniques (X-ray radiography, ultrasound testing, thermography, acoustic emission and digital image correlation) for potential crack localization. The eddy current method is particularly successful in fatigue damage monitoring, since it enables the determination of a number of cycles to the crack initiation [ 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Nondestructive Methodology for Identification of Local Discontinuities in Aluminide Layer-Coated MAR 247 during Its Fatigue Performance

et al. 2021

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In this paper, the fatigue performance of the aluminide layer-coated and as-received MAR 247 nickel superalloy with three different initial microstructures (fine grain, coarse grain and column-structured grain) was monitored using nondestructive, eddy current methods. The aluminide layers of 20 and 40 µm were obtained through the chemical vapor deposition (CVD) process in the hydrogen protective atmosphere for 8 and 12 h at the temperature of 1040 °C and internal pressure of 150 mbar. A microstructure of MAR 247 nickel superalloy and the coating were characterized using light optical microscopy (LOM), scanning electron microscopy (SEM) and X-ray energy dispersive spectroscopy (EDS). It was found that fatigue performance was mainly driven by the initial microstructure of MAR 247 nickel superalloy and the thickness of the aluminide layer. Furthermore, the elaborated methodology allowed in situ eddy current measurements that enabled us to localize the area with potential crack initiation and its propagation during 60,000 loading cycles.

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Section: Resultsmentioning

confidence: 99%

Nondestructive Methodology for Identification of Local Discontinuities in Aluminide Layer-Coated MAR 247 during Its Fatigue Performance

et al. 2021

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“…The fretting process only occurs when two surfaces in contacts are mechanically loaded and undergo relative movements of low amplitude 12 . Secondary cracks were activated during the final blade fracture stage 21 , as shown in Fig 8A . The fatigue crack propagation that caused the P2 blade failure is shown in Figure 8B, where progression lines are observed that characterize the leading crack nucleation site and the plastic deformation marks caused by fretting.…”

Section: Resultsmentioning

confidence: 99%

Fretting Fatigue In-service Failure of X20CrMo13 Stainless Steel Turbine Blade

2021

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The turbine blades play a crucial role in the efficiency of the steam turbines system, which can also lead to safety and economic implications in a catastrophic failure. The propagation of fatigue cracks is a relevant issue, especially if there are safety issues involving human life or the environment or significant economic losses. This work investigated the failure of a turbine blade of a 25 MW cogeneration power plant. One found several deformation marks and debris in the primary crack origin at the blade's base. They were responsible for the fretting fatigue type wear. The blade material matches the composition of X20CrMo13 steel; however, the hardness shows a higher average value (250±4.7) than typical standard values of 220-240 HB.

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“…[13][14][15] Since fretting mechanisms significantly reduce the service life of components, fretting fatigue has been an enduring research topic in the structural integrity community for decades. [16][17][18][19][20] According to the investigation by Collin et al, 21 the main parameters affecting fretting fatigue can be summarized into different categories: Relative slip amplitude, contact pressure distribution, local stress state, surface material conditions, and other aspects of material fatigue, including frequency, temperature, number of cycles, and environments. Fretting wear is another significant aspect affecting fretting damage.…”

Section: Introductionmentioning

confidence: 99%

“…Especially for engineering design, the fretting fatigue assessment based on conventional fatigue models becomes difficult due to local extreme stress concentrations and complex constitutive behavior 13–15 . Since fretting mechanisms significantly reduce the service life of components, fretting fatigue has been an enduring research topic in the structural integrity community for decades 16–20 …”

Section: Introductionmentioning

confidence: 99%

Experimental and computational investigation of fretting fatigue characterized by nominal contact pressure in dovetail structures

Guo

Li²,

Cao³

et al. 2022

Fatigue Fract Eng Mat Struct

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The present work is aimed at establishing an engineering design method for fretting fatigue based on experimental and computational investigation of dovetail structures made of nickel‐based superalloy. Severe stress gradients and surface wear damage make fretting fatigue difficult to be assessed based on conventional fatigue life models. With the help of detailed experimental investigations and finite element computations, a fretting fatigue life model based on the nominal pressure on the dovetail contact surfaces was related to the nonlocal multiaxial fatigue analysis. The derived fretting design method based on the nominal pressure shows a life prediction distribution within the double‐scatter band and agrees with experiments fairly well. The present model provides an efficient and easy‐to‐use design method for engineering applications.

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A review of non-destructive testing techniques for the in-situ investigation of fretting fatigue cracks

Cited by 52 publications

References 163 publications

Nondestructive Methodology for Identification of Local Discontinuities in Aluminide Layer-Coated MAR 247 during Its Fatigue Performance

Nondestructive Methodology for Identification of Local Discontinuities in Aluminide Layer-Coated MAR 247 during Its Fatigue Performance

Fretting Fatigue In-service Failure of X20CrMo13 Stainless Steel Turbine Blade

Experimental and computational investigation of fretting fatigue characterized by nominal contact pressure in dovetail structures

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