Effect of test frequency on fatigue strength of low carbon steel

Tsutsumi, Norifumi; Murakami, Yukitaka; Doquet, Véronique

doi:10.1111/j.1460-2695.2009.01350.x

Cited by 65 publications

(23 citation statements)

References 25 publications

(34 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Investigations of the VHCF behaviour of steels show that by raising the test frequency to 20 kHz, a noticeably higher fatigue strength is achieved as compared to that at lower test frequencies f = 10 Hz or 400 Hz [8,17]. The changes that occur in the stress-strain behaviour under monotonic load at different strain rates are comparable to the deviations observed in the fatigue test.…”

Section: Influence Of the Testing Methods On Fatigue Strengthsupporting

confidence: 63%

Fatigue at high number of cyclic loads: Testing methods and failure mechanism

Schneider¹,

Schwerdt²,

Wuttke³

et al. 2015

Mat.-wiss. u. Werkstofftech

View full text Add to dashboard Cite

A significant proportion of machinery and equipment is operated up to a number of cycles greater 10 8 , which is in the range of conventionally fatigue limit design. For materials with a face-centred cubic crystal lattice and for high-strength steels with a body-centred cubic crystal lattice fatigue failures were observed even in the Very High Cycle Fatigue (VHCF) regime of load-cycles greater N = 10 7 . To reduce the testing time in the VHCF regime, one possibility is to perform the tests at a higher frequency. In addition to the typical servo-hydraulic testing machines or resonant fatigue testing machine with test frequencies up to f = 400 Hz, ultrasonic fatigue testing machines with frequencies up to f = 20 kHz were used. In different comparative investigations it was shown that the testing method has a significant influence on fatigue life and fatigue strength. In this paper the influence of the testing method and test frequency on fatigue behaviour in the VHCF regime is presented using the example of steels and aluminium alloys and different hypotheses for the decrease in fatigue strength in this area are discussed.Keywords: VHCF / test frequency / testing method / ultrasonic fatigue testing machine / failure mechanism Eine Vielzahl von Maschinen und Anlagen werden bis zu Zyklenzahlen von mehr als 10 8 , also im klassischen dauerfesten Auslegungsbereich, betrieben. Bei Werkstoffen mit kubisch-flächenzentriertem Kristallgitter sowie hochfesten Stähle mit kubisch-raumzentriertem Gitter sind auch noch im Bereich sehr hoher Zyklenzahlen N > 10 7 , dem sogenannten Very High Cycle Fatigue Bereich (VHCF), Brüche zu beobachten. Eine Möglichkeit zur Reduzierung der Prüfzeiten im VHCF-Bereich ist die Durchführung der Prüfung bei höheren Frequenzen. Neben den typischen servohydraulischen Prüfmaschinen oder Resonanzprüfmaschinen mit Prüffrequenzen bis zu f = 400 Hz kommen auch Ultraschallschwingprüfsysteme mit Frequenzen von f = 20 kHz zum Einsatz. In verschiedenen vergleichenden Untersuchungen konnte festgestellt werden, dass die Prüfmethode einen signifikanten Einfluss auf die Lebensdauer sowie die Schwingfestigkeit hat. Der Beitrag stellt Einflüsse der Prüf-methode und der Prüffrequenz auf das Ermüdungsverhalten im VHCF-Bereich am Beispiel von Stählen und Aluminiumlegierungen vor und diskutiert verschiedene Hypothesen zum Abfall der Schwingfestigkeit in diesem Bereich.

show abstract

Section: Influence Of the Testing Methods On Fatigue Strengthsupporting

confidence: 63%

Fatigue at high number of cyclic loads: Testing methods and failure mechanism

Schneider¹,

Schwerdt²,

Wuttke³

et al. 2015

Mat.-wiss. u. Werkstofftech

View full text Add to dashboard Cite

show abstract

“…Another possible reason for frequency influences on fatigue lifetimes are strain rate effects. Different lifetimes of low carbon steel measured at low and ultrasonic frequency may be attributed to the sensitivity especially of body centred cubic materials to strain rate influences . In contrast, high strength steel with interior inclusions as sources of fatigue cracks was found to be insensitive to the cycling frequency .…”

Section: Discussionmentioning

confidence: 99%

VHCF properties of nitrided 18Ni maraging steel thin sheets with different Co and Ti content

Schuller¹,

Fitzka²,

Irrasch³

et al. 2014

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

High cycle fatigue (HCF) and very high cycle fatigue (VHCF) properties of two 18Ni maraging steels with different cobalt and titanium content and similar static strength are investigated. Ultrasonic fatigue tests are performed with thin sheets with nitrided surfaces at load ratio R = 0.1. The specimens are mounted on a carrier and are forced to joint vibrations at approximately 20 kHz. The increase of Co content and the elimination of Ti improved the HCF and VHCF strength of 18Ni maraging steel. TiN inclusions if Ti is present and Al2O3 inclusions in the Ti free material with sizes (areaINC)1/2 smaller than 10 µm were preferential crack initiation locations. Considering inclusions as initial cracks, the minimum stress intensity range for VHCF failure is 1.2 MPam1/2 for TiN inclusions and 1.8 MPam1/2 for Al2O3 inclusions. Data scatter may be slightly reduced if lifetimes are presented versus stress amplitudes multiplied by (areaINC)1/12 rather than in an S–N diagram.

show abstract

“…For the reason that the conventional loading (CL) frequency of RB, SH, and ER machines cannot satisfy efficiency in terms of experimental time in VHCF testing, UL machines have been widely used thanks to their ultra-high loading frequency, e.g., 20 kHz, but the increase in loading frequency will influence the fatigue strength and fatigue life in the VHCF regime, for which quite a number of investigation results [21,22,23,24,25,26,27,28,29,30,31,32,33,34] have been reported. Furuya et al [22] performed fatigue tests at the frequencies of 100 Hz, 600 Hz, and 20 kHz for a low-temperature-tempered steel with the results showing that loading frequency had little effect on VHCF properties.…”

Section: Introductionmentioning

confidence: 99%

Effects of Loading Frequency and Loading Type on High-Cycle and Very-High-Cycle Fatigue of a High-Strength Steel

Sun

Xie

et al. 2018

Materials

View full text Add to dashboard Cite

High-cycle and very-high-cycle fatigue tests via rotary bending (52.5 Hz), electromagnetic resonance (120 Hz) axial cycling, and ultrasonic (20 kHz) axial cycling were performed for a high-strength steel with three heat treatment conditions, and the effects of loading frequency and loading type on fatigue strength and fatigue life were investigated. The results revealed that the loading frequency effect is caused by the combined response of strain rate increase and induced temperature rise. A parameter η was proposed to judge the occurrence of loading frequency effect, and the calculated results were in agreement with the experimental data. In addition, a statistical method based on the control volume was used to reconcile the effect of loading type, and the predicted data were consistent with the experimental results.

show abstract

Effect of test frequency on fatigue strength of low carbon steel

Cited by 65 publications

References 25 publications

Fatigue at high number of cyclic loads: Testing methods and failure mechanism

Fatigue at high number of cyclic loads: Testing methods and failure mechanism

VHCF properties of nitrided 18Ni maraging steel thin sheets with different Co and Ti content

Effects of Loading Frequency and Loading Type on High-Cycle and Very-High-Cycle Fatigue of a High-Strength Steel

Contact Info

Product

Resources

About