Effects of Small Defects and Nonmetallic Inclusions on the Fatigue Strength of Metals

Murakami, Yukitaka

doi:10.1299/jsmea1988.32.2_167

Cited by 85 publications

(114 citation statements)

References 39 publications

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“…The local fatigue limit of the volume r WV depends on the Vicker's hardness HV and the local fatigue limit of the surface r WS depends on the Vicker's hardness, the surface roughness and the surface oxidation depth. They can be calculated with an expression following Murakami et al [6,7]:…”

Section: Calculation Methodsmentioning

confidence: 99%

Calculation of fatigue limits of case-hardened specimens with consideration of mean stresses and residual stresses

Jablonski¹,

Kienzler²

2002

Computational Mechanics

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The strength of case-hardened parts under cyclic loading can be determined in an experimental manner, but this can produce a large amount of costs due to the expenditure of material and testing time. Therefore, a calculation method is developed, that strongly reduces the number of experiments. The presented model is based on Weibull's weakest-link concept and allows to compute the survival probability of a casehardened part which is loaded close to the fatigue limit. The essential quantities in this model are the distribution of Vicker's hardness of the material, the exponents of the Weibull distribution of the volume and the surface, the residual stress state, the surface roughness and the surface oxidation depth. By integrating the survival probabilities of the surface and the volume, the survival probability of the entire specimen or part can be calculated, which allows to compute the fatigue limit. The necessary parameters have to be determined from reference specimens. The model is successfully examined by comparing experimental and calculated results of smooth and notched case-hardened specimens under alternating torsion, rotating bending, repeated tension and tension-compression.

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Section: Calculation Methodsmentioning

confidence: 99%

Calculation of fatigue limits of case-hardened specimens with consideration of mean stresses and residual stresses

Jablonski¹,

Kienzler²

2002

Computational Mechanics

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“…This argument is supported by the presence of cracked inclusions in Fig.4b. A number of researchers [8][9][10] has reported that as a crack nucleates at the interface between inclusion and matrix or crack initiates through cracking of the inclusion, the stresses within inclusion are relieved leading to stress-free defect or pores. Subsequently, the pores ahead of the crack tip coalescence hence promoting fatigue crack growth rate.…”

Section: Analysis Of Fractured Surfacementioning

confidence: 99%

Failure analysis and fatigue performance evaluation of a failed connecting rod of reciprocating air compressor

Ilman

Barizy

2015

Engineering Failure Analysis

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“…After the tests, to discuss the corrosion pit size from the vie point of fracture mechanics, the maximum value of the square root of the projected area of the corrosion pit (√ area max ) was measured with a scanning laser microscope and image analysis system [13].…”

Section: The Relationship Of Corrosion Pit Size Applied Current and mentioning

confidence: 99%

An electrochemical approach to development of a method for accele strength evaluation of hard tissue replacement materials

Lee

Kim

2003

Met. Mater. Int.

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To develop a method of accelerating the strength evaluation of hard tissue replacement materials (Ti-6Al-4V alloy) with an electrochemical approach in the short term, corrosion tests were carried out on Ti-6Al-4V alloy by means of applying a uniform current to a simulated physiological environment and the potential difference was scanned to check the variations in the resistance of the specimens. As a result, the corrosion behavior was monitored by scanning the potential difference and an empirical formula for controlling the corrosion behavior of the Ti-6Al-4V alloy in the simulated physiological environment was proposed.

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Effects of Small Defects and Nonmetallic Inclusions on the Fatigue Strength of Metals

Cited by 85 publications

References 39 publications

Calculation of fatigue limits of case-hardened specimens with consideration of mean stresses and residual stresses

Calculation of fatigue limits of case-hardened specimens with consideration of mean stresses and residual stresses

Failure analysis and fatigue performance evaluation of a failed connecting rod of reciprocating air compressor

An electrochemical approach to development of a method for accele strength evaluation of hard tissue replacement materials

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