Design and Development of an Ultrasonic Fatigue Testing System for Very High Cycle Fatigue

Ilie, Paul; Lesperance, Xavier; Ince, Ayhan

doi:10.4271/2020-01-0183

Cited by 2 publications

(6 citation statements)

References 11 publications

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“…When the threshold value for frequency deviation is passed, a fracture is detected, and the test stops. This compares to analogous failure detection mechanisms in [39,40]. Specimen heating is avoided by the…”

Section: Quasi-static Testingmentioning

confidence: 99%

“…When damage in the form of cracks accumulates, the machine, which runs at displacement amplitude, detects a deviation in frequency due to damping behavior. Wh threshold value for frequency deviation is passed, a fracture is detected, and the test stop compares to analogous failure detection mechanisms in [39,40]. Specimen heating is avoided the VHCF tests, an ultrasonic testing system Shimadzu USF-2000A (Shimadzu Deutschland Duisburg, Germany) has been used (Figure 5).…”

Section: Fatigue Testingmentioning

confidence: 99%

“…When the d value for frequency deviation is passed, a fracture is detected, and the test stops. This s to analogous failure detection mechanisms in [39,40]. Specimen heating is avoided by the When damage in the form of cracks accumulates, the machine, which runs at specific displacement amplitude, detects a deviation in frequency due to damping behavior.…”

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confidence: 94%

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Fracture–Mechanical Assessment of the Effect of Defects on the Fatigue Lifetime and Limit in Cast and Additively Manufactured Aluminum–Silicon Alloys from HCF to VHCF Regime

Tenkamp

Awd

Siddique

et al. 2020

Metals

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Aluminum–silicon alloys are commonly used in die-cast and additively manufactured (AM) light-weight components due to their good processability and high strength-to-weight ratio. As both processing routes lead to the formation of defects such as gas and shrinkage porosity, a defect-sensitive design of components is necessary for safe application. This study deals with the fatigue and crack propagation behavior of die-cast alloy AlSi7Mg0.3 and additively manufactured alloy AlSi12 and its relation to process-induced defects. The different porosities result in significant changes in the fatigue stress-lifetime (S–N) curves. Therefore, the local stress intensity factors of crack-initiating defects were determined in the high and very high cycle fatigue regime according to the fracture mechanics approach of Murakami. Through correlation with fatigue lifetime, the relationship of stress intensity factor (SIF) and fatigue lifetime (N) could be described by one power law (SIF–N curve) for all porosities. The relationship between fatigue limit and defect size was further investigated by Kitagawa–Takahashi (KT) diagrams. By using El Haddad’s intrinsic crack length, reliable differentiation between fracture and run out of the cast and AM aluminum alloys could be realized. SIF–N curves and KT diagrams enable a reliable fatigue design of cast and AM aluminum alloys for a finite and infinite lifetime.

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Section: Quasi-static Testingmentioning

confidence: 99%

Section: Fatigue Testingmentioning

confidence: 99%

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Fracture–Mechanical Assessment of the Effect of Defects on the Fatigue Lifetime and Limit in Cast and Additively Manufactured Aluminum–Silicon Alloys from HCF to VHCF Regime

Tenkamp

Awd

Siddique

et al. 2020

Metals

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“…The present authors 30,32 provided design and development details of the ultrasonic fatigue testing system, for example, a power supply/signal generator, piezoelectric converter, horn, booster, test specimen, data acquisition and control systems. Readers can refer to detailed description for design iterations of the acoustic stack and technical aspects of generation, control and verification of vibration amplitudes and representative fatigue data validation in references 30,32 …”

Section: Ultrasonic Fatigue Testing For Vhcfmentioning

confidence: 99%

“…Readers can refer to detailed description for design iterations of the acoustic stack and technical aspects of generation, control and verification of vibration amplitudes and representative fatigue data validation in references. 30,32…”

Section: Ultrasonic Fatigue Testing For Vhcfmentioning

confidence: 99%

Very high cycle fatigue characterization of additively manufactured AlSi10Mg and AlSi7Mg aluminium alloys based on ultrasonic fatigue testing

Lesperance

Ilie

Ince

2020

Fatigue Fract Eng Mat Struct

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This paper investigates long fatigue life characteristics of AlSi10Mg and AlSi7Mg aluminium alloys produced using direct metal laser sintering. An inhouse built ultrasonic fatigue testing machine was used to carry out fatigue tests on specimens machined from heat-treated AlSi10Mg and AlSi7Mg alloys subjected to constant fully reversed tension-compression loadings. The fatigue life data acquired for these two additive manufacturing (AM) aluminium alloys were compared with previously published data under heat treatment and nonheat treatment conditions. It was found that fatigue data of tested specimens fit more closely the data of specimens without any heat treatment. Fatigue test results indicate that effects of heat treatment on high cycle fatigue (HCF) and very high cycle fatigue (VHCF) performance of AM alloys should be further investigated in the context of the microstructural changes.

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Design and Development of an Ultrasonic Fatigue Testing System for Very High Cycle Fatigue

Cited by 2 publications

References 11 publications

Fracture–Mechanical Assessment of the Effect of Defects on the Fatigue Lifetime and Limit in Cast and Additively Manufactured Aluminum–Silicon Alloys from HCF to VHCF Regime

Fracture–Mechanical Assessment of the Effect of Defects on the Fatigue Lifetime and Limit in Cast and Additively Manufactured Aluminum–Silicon Alloys from HCF to VHCF Regime

Very high cycle fatigue characterization of additively manufactured AlSi10Mg and AlSi7Mg aluminium alloys based on ultrasonic fatigue testing

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