A critical of carbide cracking mechanisms in ferride/carbide aggregates

Lindley, T.C.; Oates, Gary; Richards, C.E.

doi:10.1016/0001-6160(70)90103-3

Cited by 188 publications

(69 citation statements)

References 10 publications

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“…However, previous fundamental work (Averbach, 1965;Tetelman and McEvily, 1967) clearly shows the strong effect of plastic deformation, in the form of inhomogeneous arrays of dislocations, on microcrack nucleation which also contributes to trigger cleavage fracture at the material's microlevel. Based upon direct observations of cleavage microcracking by plastic strain made in ferritic steels at varying temperatures (Brindley, 1970;Lindley et al, 1970;Gurland, J., 1972), the microcrack density can then be further generalized in terms of…”

Section: The Weibull Stress For Cracked Solidsmentioning

confidence: 99%

“…where p ε is the (effective) plastic strain, γ and β represent parameters defining a power law relationship between the microcrack density and plastic strain as inferred in Lindley et al (1970). Now, upon introducing the dependence between the critical microcrack size, , and (local) stress in the form…”

Section: The Weibull Stress For Cracked Solidsmentioning

confidence: 99%

“…(12) in predictions of the failure strain for the wide plated conducted next, the present investigation considers two sets of widely different parameters defining the microcrack density: i) = γ 0 (no plastic strain correction) and ii) = γ 1 and = β 0 which implies a simple linear dependence of microcrack density on the plastic strain. While this choice of parameters γ and β is somewhat arbitrary, it does make contact with the experimental findings of Lindley et al (1970) and Gurland (1972) in ferritic steels. Very detailed finite element computations of these specimens enable construction of the of mismatch effects; here, changing the -value assigns a different weight factor to stresses at locations very near to the crack front thereby altering the ratio of mismatch correction.…”

Section: Weibull Modulus Calibration For the Tested Weldmentmentioning

confidence: 99%

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A micromechanics approach to assess effects of constraint on cleavage fracture toughness: a weibull stress model

Ruggieri¹

2010

J. Braz. Soc. Mech. Sci. & Eng.

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Section: The Weibull Stress For Cracked Solidsmentioning

confidence: 99%

Section: The Weibull Stress For Cracked Solidsmentioning

confidence: 99%

Section: Weibull Modulus Calibration For the Tested Weldmentmentioning

confidence: 99%

See 1 more Smart Citation

A micromechanics approach to assess effects of constraint on cleavage fracture toughness: a weibull stress model

Ruggieri¹

2010

J. Braz. Soc. Mech. Sci. & Eng.

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“…Kaechele & Tetelman, 5) Lindley et al 6) and Gurland 7) investigated the cementite cracking by experimental studies. Their achievements showed that a probability of cementite cracking depends on plastic strain and yield stress.…”

Section: Introductionmentioning

confidence: 99%

Observation and Quantification of Crack Nucleation in Ferrite-Cementite Steel

2014

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It is known that a cracking of brittle phase such as cementite works as a trigger of cleavage fracture initiation. This study shows a microscopic observation of cracked cementite and its quantitation of the cracking nucleation in ferrite-cementite steels. Seven steels with various sizes of microstructures are produced by laboratory scale vacuum melting and rolling. The cementite particle thickness was measured by a SEM observation and an image analysis. Tensile tests using circumferential notched round bar specimens were conducted. A trace analysis of cleavage surface of cementite using the EBSD analysis indicated a possibility that the cleavage surface coincides with (010) plane. Distributions of cementite particle crack lengths were measured for various strain and stress conditions. In order to understand a microscopic internal stress of cementite particle, a finite element analysis was carried out. An estimation formula of internal stress of the cementite particle from macroscopic stress and strain was developed based on the numerical results. A nucleation of cementite cracking should be quantitated based on a stochastic framework because of its uncertainties such as distribution, shape, orientation and so on. The measured distributions of cementite particle thickness and crack length were approximated by introducing a distribution function considering upper limit. Probability of nucleation of cementite cracking was formulated as a function of cementite particle thickness and macroscopic stress and strain, based on the approximated distribution function and the estimation formula of internal stress of the cementite particle.

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“…Код нискоугљеничних челика лом је превасходно инициран ломљењем честица цементита лоцираних на границама феритних зрна [129]. Детаљним истраживањима утврђен је модел по којем долази до иницијације лома на честицама карбида или других честица кртих секундарних фаза, као што је илустровано на слици 2.42 [135][136][137][138].…”

Section: нуклеација лома на честицама секундарних фазаunclassified

Structure and fracture of medium carbon microalloyed steel

Glišić¹

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A critical of carbide cracking mechanisms in ferride/carbide aggregates

Cited by 188 publications

References 10 publications

A micromechanics approach to assess effects of constraint on cleavage fracture toughness: a weibull stress model

A micromechanics approach to assess effects of constraint on cleavage fracture toughness: a weibull stress model

Observation and Quantification of Crack Nucleation in Ferrite-Cementite Steel

Structure and fracture of medium carbon microalloyed steel

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