Kinetic effects in the mechanics of delayed fracture of high-strength alloys

Romaniv, O. N.; Nikiforchin, G. N.; Deev, N. A.

doi:10.1007/bf00716286

Cited by 5 publications

(4 citation statements)

References 17 publications

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“…In this mongraph and handbook [7], all three stages of the process and transition modes are discussed in detail. Howeever, the main attention of these authors [6,7] is concentrated on the representation of these diagrams in the form of dependencies on SIF that does not agree with the results obtained for small-scale yielding in quasibrittle materials (9). Given in Fig.…”

Section: Averaged Rates Of Macro-crack Tip Advancementioning

confidence: 99%

The coupled criterion for description of fatigue fracture. Material embrittlement in pre-fracture zone

Kornev

2018

MATEC Web Conf.

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Step-wise extension of a crack in quasi-brittle materials under low-cycle loading conditions is considered. Both steady and unsteady loadings in pulsating loading mode are studied. It is proposed to use quasi-brittle fracture diagrams for bodies under cyclic loading conditions. When diagrams are plotted, both necessary and sufficient fracture criteria by Neuber-Novozhilov are used. A specific implementation is made on the base of the Leonov-Panasyuk-Dugdale model for the mode I cracks when the pre-fracture zone width coincides with the plasticity zone width near the crack tip. The condition of a step-wise crack tip extension has been derived. A crack extends only in the embrittled material of the pre-fracture zone. The number of cycles between jumps of the crack tip is calculated by the Coffin equation, when damage accumulation in material in the pre-fracture zone is taken into account. Critical fracture parameters under low-cyclic loading conditions have been obtained in a closed form. Estimates of the average rate of crack tip advance for a loading cycle at step-wise crack extension and S − N curves have been obtained.

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Section: Averaged Rates Of Macro-crack Tip Advancementioning

confidence: 99%

The coupled criterion for description of fatigue fracture. Material embrittlement in pre-fracture zone

Kornev

2018

MATEC Web Conf.

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“…8. To this end, apart from preservation of the SSY condition according to limitation (27), the SIF must exceed a certain level to attain the self-similar state (28) before a critical event. Correspondingly, the minimal SIF to establish (29) i SSF -Λ-ssfΡ (30) I SSF AVdominance, Κ$SF x > according to relations (29) and (30) In order to grant A"-dominance of crack propagation, local rupture must occur whilst the near-tip situation is really controlled by SIF.…”

Section: The Two-side Bounding For Maintenance Of the End-region Automentioning

confidence: 99%

“…where K S5 \ is the maximum SIF at which SSY in a certain cracked solid is still maintained according to the condition (27), and ^SSF is the minimum SIF to establish a self-similar field, i.e., just what allows a clear distinction between a crack as an object of fracture mechanics methodology and an arbitrary flaw (e.g., a cut, a notch, or of any other kind) for which fracture mechanics in general, and LEFM in particular, does not work because local rupture there occurs at nominal applied Κ < KSSF(P), i.e., when the very near tip stress-strain field is not controlled solely by K.…”

Section: The Two-side Bounding For Maintenance Of the End-region Automentioning

confidence: 99%

Factors Affecting the Intrinsic Character of the Crack Growth Kinetics Curve in Stress Corrosion Cracking: A Review

Toribio¹,

Kharin²

2001

Corrosion Reviews

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“…The problem of the influence of the geometry factor on the invariance of the kinetic diagrams was analyzed in [11,12]. The size of the plastic zone at the crack tip must be approximately constant across the thickness of the specimen.…”

Section: Construction Of the Kinetic Diagram Of Hydrogen-assisted Cramentioning

confidence: 99%

Methodological aspects of evaluation of the characteristics of crack-growth resistance of materials in hydrogen environments under sustained and cyclic loading

Andreikiv¹,

Ivanyts’kyi²

1998

Mater Sci

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Ivanyts'kyi UDC 669.788 We analyze and synthesize the results of evaluation of the characteristics of crack-growth resistance of materials subjected to sustained static or cyclic loading in hydrogen-containing media. Our attention is mainly given to the methodological aspects of experimental procedures used for the evaluation of these characteristics. We describe basic schemes of loading and design of the specimens and analyze testing techniques. The applicability of the proposed experimental procedures is checked for steels used in hydrogen power engineering.

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Kinetic effects in the mechanics of delayed fracture of high-strength alloys

Cited by 5 publications

References 17 publications

The coupled criterion for description of fatigue fracture. Material embrittlement in pre-fracture zone

The coupled criterion for description of fatigue fracture. Material embrittlement in pre-fracture zone

Factors Affecting the Intrinsic Character of the Crack Growth Kinetics Curve in Stress Corrosion Cracking: A Review

Methodological aspects of evaluation of the characteristics of crack-growth resistance of materials in hydrogen environments under sustained and cyclic loading

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