Features of the fatigue failure of steel with metastable austenite

L'vov, Yu. B.; Maloletnev, A. Ya.; Perkas, M. D.; Birakhovskii, Yu. G.; Leonova, N. K.; Gurevich, Ya. B.

doi:10.1007/bf00779393

Cited by 2 publications

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“…11 Fatigue data analysed by Murakami 12 led to the proposal of a ‘defect free fatigue limit’ σ w0 , which can be calculated from the tensile strength σ U or the hardness (HV) This relationship has been shown to work well for hardness values below ∼400 HV, independent of microstructure and even for aluminium alloys. However, L'vov et al 13 studied a steel which contained metastable austenite and concluded that the microstructure did have an influence, both through the austenite substructure resulting from warm deformation during processing, and by transformation to martensite during loading. It is possible that both of these would be reflected in increased ultimate tensile strength and hardness.…”

Section: Resultsmentioning

confidence: 99%

Fatigue of extremely fine bainite

Peet¹,

Hill

Rawson

et al. 2011

Materials Science and Technology

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There is a novel steel invented in which the structure consists of extremely fine platelets of bainitic ferrite dispersed in a matrix of carbon enriched retained austenite. The resulting large density of interfaces makes the alloy very strong in its transformed condition. The authors report the first fatigue tests on this system, by measuring the life of parallel gauged samples tested using cyclic loading in tension, with maximum stresses in the range 1?2-1?6 GPa. A comparison of the results against published data indicates that the performance of the steel is consistent with the behaviour of other strong steels, in spite of the fact that it is produced using an air melting technique.

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Section: Resultsmentioning

confidence: 99%

Fatigue of extremely fine bainite

Peet¹,

Hill

Rawson

et al. 2011

Materials Science and Technology

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High-Cycle, Push–Pull Fatigue Fracture Behavior of High-C, Si–Al-Rich Nanostructured Bainite Steel

Zhao

Wang

2017

Materials

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The high-cycle, push–pull fatigue fracture behavior of high-C, Si–Al-rich nanostructured bainitic steel was studied through the measurement of fatigue limits, a morphology examination and phase composition analysis of the fatigue fracture surface, as well as fractography of the fatigue crack propagation. The results demonstrated that the push–pull fatigue limits at 107 cycles were estimated as 710–889 MPa, for the samples isothermally transformed at the temperature range of 220–260 °C through data extrapolation, measured under the maximum cycle number of 105. Both the interior inclusion and the sample surface constituted the fatigue crack origins. During the fatigue crack propagation, a high amount of secondary cracks were formed in almost parallel arrangements. The apparent plastic deformation occurred in the fracture surface layer, which induced approximately all retained austenite to transform into martensite.

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Features of the fatigue failure of steel with metastable austenite

Cited by 2 publications

References 3 publications

Fatigue of extremely fine bainite

Fatigue of extremely fine bainite

High-Cycle, Push–Pull Fatigue Fracture Behavior of High-C, Si–Al-Rich Nanostructured Bainite Steel

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