Ductile cast irons: Microstructure influence on the damaging micromechanisms in overloaded fatigue cracks

Cocco, Vittorio Di; Iacoviello, Francesco

doi:10.1016/j.engfailanal.2017.06.039

Cited by 27 publications

(6 citation statements)

References 23 publications

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“…Moreover, in other similar studies [24] , [25] , [26] , [27] , the fatigue crack length was measured for ductile cast irons, which could be compared and analyzed with the results of the present study. The crack length was between 1.7 and 29.5 mm in the present work (neglecting Specimen No.…”

Section: Materials and Experimentsmentioning

confidence: 81%

“… [19] performed failure analysis on a crankshaft of a boxer diesel engine and their results demonstrated that the crack surface created in the fillet area of the crankshaft pin due to the stress concentration or loading conditions. Di Cocco and Iacoviello [20] investigated the effect of the microstructure on damage micro-mechanisms in the field of fatigue cracks due to overload. They concluded that the increase in the damage level was evidence of the influence of ferritic and ferritic-pearlite DCIs.…”

Section: Materials and Experimentsmentioning

confidence: 99%

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Data analysis of striation spacing, lifetime, and crack length in crankshaft ductile cast iron under cyclic bending loading through high-cycle fatigue regime

2022

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Section: Materials and Experimentsmentioning

confidence: 81%

Section: Materials and Experimentsmentioning

confidence: 99%

Data analysis of striation spacing, lifetime, and crack length in crankshaft ductile cast iron under cyclic bending loading through high-cycle fatigue regime

2022

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“…Several factors contribute to the various morphology and distribution of graphites for the experimental ductile irons, which is mainly attributed to the different heat treatment processes [16,[19][20][21][22]. The carbon gradually diffuses from spherical graphite to the matrix, forming the carbon supersaturated austenite during the process of austenitizing.…”

Section: Graphite Morphologymentioning

confidence: 99%

Revealing the strength and toughness mechanisms of ductile iron in three heat‐treatment processes

Lin,

Jin,

Chen

et al. 2024

Materialwissenschaft Werkst

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Microstructural characteristics and mechanical properties of the ductile iron in three heat treatment processes (normalizing, quenching + high‐temperature tempering and isothermal quenching) were investigated in this paper. The pearlite and ferrite with large‐sized spherical graphites can be obtained in the normalized sample, and the spherical graphites with relatively large size can still be observed in the mechanical mixture of tempered martensite and acicular ferrite for the quenched‐tempered sample. Meanwhile, the lower bainite accompanied with the relatively fine spherical graphites are existed in the isothermal‐quenched sample. The difference of tensile strength is mainly caused by the phase composition, distribution and size of the spherical graphites and the effect of the solid solution strengthening. The weaker degree of the debonding damage, higher proportion of high‐angle grain boundaries will improve the impact toughness of the ductile iron. In a word, the optimum combination of strength and toughness is acquired by using isothermal quenching, and the tensile strength and impact toughness are ~1350 MPa and ~10.62 J, respectively.

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“…Interface cracks in bodies under harmonic load was investigated in [23]. Microstructure influence on the damage micromechanisms in overloaded fatigue cracks was studied in [24]. Crack-tip field in circumferentially-cracked round bar (CCRB) in tension affected by loss of axial symmetry was explored in [25].…”

Section: Introductionmentioning

confidence: 99%

Elastic crack-tip stress field in a semi-strip

Reut

Vaysfeld

Zhuravlova

2018

Frattura Ed Integrità Strutturale

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ABSTRACT. In this article the plain elasticity problem for a semi-strip with a transverse crack is investigated in different cases of boundary conditions at the semi-strip's end. Unlike many works dedicated to this subject, the fixed singularities in the singular integral equation's kernel are considered. The integral transformations' method is applied by a generalized scheme to reduce the initial problem to a one-dimensional problem. The one-dimensional problem is formulated as a vector boundary value problem which is solved with the help of matrix differential calculations and Green's matrix apparatus. The problem is reduced to solve the system of three singular integral equations. Depending on the conditions given on the short edge of the semistrip, the obtained singular integral equation can have one or two fixed singularities. A special method is applied to solve this equation in regard to the singularities existence. Hence, the system of the singular integral equations (SSIE) is solved with the help of the generalized method. The stress intensity factors (SIF) are investigated for different lengths of crack. The novelty of this work is the application of a new approach allowing the consideration of fixed singularities in the problem of a transverse crack in the elastic semi-strip. The comparison of the accuracy of numerical results during the use of different approaches to solve the SSIE is calculated.

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Ductile cast irons: Microstructure influence on the damaging micromechanisms in overloaded fatigue cracks

Cited by 27 publications

References 23 publications

Data analysis of striation spacing, lifetime, and crack length in crankshaft ductile cast iron under cyclic bending loading through high-cycle fatigue regime

Data analysis of striation spacing, lifetime, and crack length in crankshaft ductile cast iron under cyclic bending loading through high-cycle fatigue regime

Revealing the strength and toughness mechanisms of ductile iron in three heat‐treatment processes

Elastic crack-tip stress field in a semi-strip

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