Fracture Toughness of Nodular Graphite Cast Irons Under Static, Impact and Cyclic Loading

Krasowsky, A. J.; Kramarenko, I. V.; Kalaida, V. V.

doi:10.1111/j.1460-2695.1987.tb00480.x

Cited by 19 publications

(3 citation statements)

References 5 publications

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“…They indicated that austempering at 370" for 60 min results in the optimum combination of strength and impact toughness. Krasowsky et al [9] studied the fracture toughness of nodular cast irons of differing percentage pearlite structures. From the fractographic observations, graphite inclusions play an important role in the process of fracture.…”

Section: Introductionmentioning

confidence: 99%

Fracture Toughness of Bainitic Nodular Cast Iron

Doong

Chen

1989

Fatigue Fract Eng Mat Struct

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The fracture toughness of bainitic ductile iron transformed at various austempering temperatures and austempering times was evaluated by using compact tension specimens and compared with the fracture toughness of bulleye casting structure. Using Scanning Electron Microscopy, the mechanism of the fracture mode can be understood by observing the fracture surface. An X-ray diffractometer was used to determine the volume fraction of retained austenite. From the results of fracture toughness properties, it can be concluded that the most suitable austempering temperature of the material used in the present study is from 300 to 350°C. NOMENCLATURE a = crack length B = specimen thickness W = specimen width P,,, = maximum load u,, = yield stress

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Section: Introductionmentioning

confidence: 99%

Fracture Toughness of Bainitic Nodular Cast Iron

Doong

Chen

1989

Fatigue Fract Eng Mat Struct

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“…The results, confirming the presence of residual stresses, suggest that they must be addressed in the analysis of the mechanical behavior of DCI, especially in facing applications involving fatigue, where their role is of primary importance. In this regard, Krasowsky et al [19], using neutron diffraction monitoring of DCI under cyclic loading, demonstrated that as stress increased, the graphite inclusions promoted the nucleation of microcracks. Still, the residual compressive stresses surrounding them locally retarded fatigue crack growth.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical Modeling for Predicting Residual Stress–Strain State around Nodules in Ductile Cast Irons

Ruggiero,

Khademi

2023

Metals

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In this paper, a micromechanical model was developed to predict the residual stress–strain state that is generated around nodules of a ferritic ductile cast iron during solidification. A finite element analysis was performed on a reference volume element of the material to analyze the local strain development, having modeled both matrix and nodule as deformable bodies in contact. The behavior of the nodule was assumed linear–elastic because of the low stresses to which it is subjected during cooling. On the other hand, elasto-plastic viscous behavior was considered for the matrix, considering both the primary and secondary creep regimes. To make up for the lack of information on the physical–thermomechanical properties of the constituents, the available literature data were integrated with the results obtained from the CALPHAD methodology applied to both cast iron and the steel that constitutes its matrix. The micromechanical model was validated by comparing the resulting residual strains with experimental data available in the literature for a ferritic ductile cast iron. Then, it was used for analyzing the correlation between the solidification history and the mechanical response of cast iron in terms of the uniaxial stress–strain curve.

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“…Spherical graphite cast iron (FCD) is much superior to the other materials in its abrasion resistance, damping property, low temperature shock property, economy and workability [4], and thus it is extensively used in cylinder block, cylinder head, connecting rod and brake parts of automobile assemblies [5][6][7][8][9][10]. These * Corresponding author.…”

Section: Introductionmentioning

confidence: 99%