Estimation procedure of J-resistance curves for SE(T) fracture specimens using unloading compliance

Cravero, Sebastian; Ruggieri, Cláudio

doi:10.1016/j.engfracmech.2007.01.012

Cited by 154 publications

(107 citation statements)

References 12 publications

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“…[13,49] The HEAC properties in Figure 14, from elastoplastic K J analysis of a small specimen, are quantitatively relevant to a structure under elastic loading, following the J-integral approach. [58,60,66,67,[76][77][78] To verify this assertion, it is necessary to demonstrate K and J dominance of crack tip mechanics. [52] K dominance is established by comparing the uncracked SENT ligament (W-a) and plane strain plastic zone diameter (estimated using the Ramberg-Osgood flow properties for Monel K-500) for the deepest crack and high-elastic K of 50 MPaÖm.…”

Section: Mpa√mmentioning

confidence: 99%

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Measurement and Modeling of Hydrogen Environment-Assisted Cracking in Monel K-500

Gangloff

Burns

et al. 2014

Metall Mater Trans A

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Hydrogen environment-assisted cracking (HEAC) of Monel K-500 is quantified using slow-rising stress intensity loading with electrical potential monitoring of small crack propagation and elastoplastic J-integral analysis. For this loading, with concurrent crack tip plastic strain and H accumulation, aged Monel K-500 is susceptible to intergranular HEAC in NaCl solution when cathodically polarized at À800 mV SCE (E A , vs saturated calomel) and lower. Intergranular cracking is eliminated by reduced cathodic polarization more positive than À750 mV SCE . Crack tip diffusible H concentration rises, from near 0 wppm at E A of À765 mV SCE , with increasing cathodic polarization. This behavior is quantified by thermal desorption spectroscopy and barnacle cell measurements of hydrogen solubility vs overpotential for planar electrodes, plus measured-local crevice potential, and pH scaled to the crack tip. Using crack tip H concentration, excellent agreement is demonstrated between measurements and decohesion-based model predictions of the E A dependencies of threshold stress intensity and Stage II growth rate. A critical level of cathodic polarization must be exceeded for HEAC to occur in aged Monel K-500. The damaging-cathodic potential regime likely shifts more negative for quasi-static loading or increasing metallurgical resistance to HEAC.

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Section: Mpa√mmentioning

confidence: 99%

“…[65] Stress state dependent terms in Eqs. [4] through [7] were assumed to be plane strain values, justified by three-dimensional finite element analyses [66,67] and the flat Mode I appearance of all EAC surfaces for Monel K-500.…”

Section: ½7mentioning

confidence: 99%

Measurement and Modeling of Hydrogen Environment-Assisted Cracking in Monel K-500

Gangloff

Burns

et al. 2014

Metall Mater Trans A

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“…3a and b, respectively) over the range a/W ¼ 0.125 to 0.625 in equal steps of 0.125. These values are then compared with those calculated by Chiodo et al [6,7] and John et al [8] (Fig. 4a).…”

Section: Verification Of the K I Calculation Proceduresmentioning

confidence: 99%

Crack Propagation in Tool Steel X38CrMoV5 (AISI H11) in SET Specimens

Shah¹,

Mabru²,

Boher³

et al. 2009

Adv Eng Mater

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“…Given their complexity, preference has been given in this paper to a more hands-on, analytical approach. A number of equations are available in literature, all based on elastic 2D finite element simulations [12,13,36,37]. A comparative study indicated only minor differences between these equations.…”

Section: Appendix A: Unloading Compliance Equationsmentioning

confidence: 99%

Single-specimen evaluation of tearing resistance in SENT testing

Verstraete

Waele

Minnebruggen

et al. 2015

Engineering Fracture Mechanics

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Please cite this article as: Verstraete, M.A., De Waele, W., Van Minnebruggen, K., Hertelé, S., Single-specimen evaluation of tearing resistance in SENT testing, Engineering Fracture Mechanics (2015), doi: http://dx.doi.org/ 10. 1016/j.engfracmech.2015.07.067 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Abstract The evaluation of CTOD tearing resistance is required by several strain based defect assessment procedures. To that extent, the use of SENT testing is widely advised as the constraint matches that of pressurized pipes. This indicates the need for well validated testing methods. This paper discusses two single specimen techniques for the evaluation of tearing resistance using clamped SENT specimens: the unloading compliance (UC) and the direct current potential drop (DCPD) technique. From the results of tests carried out on a variety of both base metal and welded specimens, both methods show a comparable accuracy and scatter. Single-specimen evaluation of tearing resistance in SENT testing

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Estimation procedure of J-resistance curves for SE(T) fracture specimens using unloading compliance

Cited by 154 publications

References 12 publications

Measurement and Modeling of Hydrogen Environment-Assisted Cracking in Monel K-500

Measurement and Modeling of Hydrogen Environment-Assisted Cracking in Monel K-500

Crack Propagation in Tool Steel X38CrMoV5 (AISI H11) in SET Specimens

Single-specimen evaluation of tearing resistance in SENT testing

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