Observations in Very High Cycle Fatigue Regime
Modelling of corrosion fatigue crack initiation on martensitic stainless steel in high cycle fatigue regime
... corrosion fatigue tests Electrochemical Impedance Spectroscopy (EIS) were carried out to evaluate the passivation state of the tested ...the regime without cyclic stress, a low capacitance was ...SEM ...
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Damage Mechanisms and Fatigue Lives: From the Low to the Very High Cycle Regime
... on high-strength steels which did not show a fatigue limit beyond the HCF regime, but failed by subsurface so-called “fish-eye” fractures in ...HCF regime, surface damage still occurs but in a ...
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A two-parameter model to predict fatigue life of high-strength steels in a very high cycle fatigue regime
... kHz) fatigue tests were per- formed on specimens of a high-strength steel in a VHCF regime, and a two-parameter model was developed to pre- dict the fatigue life of high-strength steels ...
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Fatigue behaviour and fractography of extruded AZ80 magnesium alloys in very high cycle regime
... Keywords: Very High Cycle Fatigue; Exrtuded Magnesium Alloy; Step-wise S-N Curve; Fractography; Crack Initiation; Twin; Artificial Aging ...of high efficiency, saving energy, minimizing ...
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Fatigue crack initiation and growth on a steel in the very high cycle regime with sea water corrosion
... of fatigue tests have been carried out: crack initiation and crack ...ultrasonic fatigue testing machine [1] under fully reversed tension (R = 1) (details can be found in ...(ii) fatigue crack growth ...
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Fatigue crack initiation and growth on a steel in the very high cycle regime with sea water corrosion
... two very different frequencies is proposed by Yeske and ...a high rate in ultrasonic fatigue but it appears that transport may be accelerated by convection induced by the high frequency ...at ...
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Thermal Response of C45 Steel in High and Very High Cycle Fatigue
... 2.2. Fatigue experiments and thermal measurements To perform experiments up to a very high number of cycles in a reasonable time, ultrasonic equipment at a testing frequency of 20 kHz was ...the ...
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Very high cycle fatigue of wrought magnesium alloy AZ61
... Abstract During their operation, modern aircraft engine components are subjected to increasingly demanding operating conditions, especially the high pressure turbine (HPT) blades. Such conditions cause these parts ...
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Cyclic deformation behavior of austenitic stainless steels in the very high cycle fatigue regime: Experimental results and mechanismbased simulations
... The present work focuses on the questions, in which way and to which extent the stability of the austenite phase in fluences the dominant fatigue damage mecha- nisms. One of the major experimental approaches of ...
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Damage evolution in the AlMg6 alloy during high and very high cycle fatigue
... irreversible fatigue damage accumulation, based on the analysis of nonlinear manifestations of the feedback signal in a closed system of an ultrasonic fatigue ...During very high cycle ...
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Very high cycle fatigue behavior of bridge steel welded joint
... mechanism, very high cycle fatigue In the applications of aircrafts, automobiles, off- shore structures and railway equipments, many com- ponents may experience nominal vibratory stress con- ...
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Very high cycle fatigue strength and crack growth of thin steel sheets
... basic observations or for industrial applications it is of interest to use flat specimens at very high frequency in the gigacycle ...out fatigue tests at high frequency (20 kHz) up to ...
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Very high cycle fatigue behavior under constant and variable amplitude loading
... a very high number of ...of very high cycle fatigue (VHCF) are mainly focused on experiments without mean stresses and with constant amplitude ...VHCF regime systematic ...
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Very high cycle fatigue strength and crack growth of thin steel sheets
... basic observations or for industrial applications it is of interest to use flat specimens at very high frequency in the gigacycle ...out fatigue tests at high frequency (20 kHz) up to ...
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Very high cycle fatigue strength and crack growth of thin steel sheets
... basic observations or for industrial applications it is of interest to use flat specimens at very high frequency in the gigacycle ...out fatigue tests at high frequency (20 kHz) up to ...
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Microstructural features controlling very high cycle fatigue of nitrided maraging steel
... of very high cycle fatigue (VHCF) damage in an austenitic-ferritic duplex stainless steel have been investigated by in-situ X-ray diffraction technique applying up to 10 9 cycles and a nominal ...
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Very high cycle fatigue crack initiation mechanisms in different engineering alloys
... grade Fatigue crack initiation in the cold rolled strip duplex stainless steel occurred invariably due to the surface defects irrespective of fatigue life length of all the tested ...specimen fatigue ...
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Investigating Microstructural and Environmental Effects on the Very High Cycle Fatigue Behavior of TI-6242S.
... 4.30: High magnification image of material from a surface crack of a specimen fatigued in ...increased fatigue crack growth rates in the presence of water vapor is ...the fatigue cycle, a ...
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Influence of microstructure and inclusions on very high cycle fatigue behavior of compressor blade steels
... The very high cycle fatigue behaviour tended to appear in high strength steel and inclusion is an important ...the fatigue damage stage, cyclic stress attacked both surface and ...
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Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel
... be very high which explains the interest in the very high cycle fatigue (VHCF) properties of these ...ultrasonic fatigue tests at load ratio R = -1 with four 18Ni maraging ...
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