Development of a fundamental crack tip strain rate equation and its application to quantitative prediction of stress corrosion cracking of stainless steels in high temperature oxygenated water

Peng, Qunjia; Kwon, Jun-Hyun; Shoji, Tetsuo

doi:10.1016/j.jnucmat.2003.09.008

Cited by 75 publications

(23 citation statements)

References 14 publications

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“…where the oxidation rate constant  a is 7.478×10 -7 , the exponent of current decay curve m is 0.5 [19]. Fig.…”

Section: Scc Growth Ratementioning

confidence: 98%

Numerical investigation on stress corrosion cracking behavior of dissimilar weld joints in pressurized water reactor plants

Zhao¹,

Xue²,

Yang³

et al. 2014

Frattura Ed Integrità Strutturale

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ABSTRACT. There have been incidents recently where stress corrosion cracking (SCC) observed in the dissimilar metal weld (DMW) joints connecting the reactor pressure vessel (RPV) nozzle with the hot leg pipe. Due to the complex microstructure and mechanical heterogeneity in the weld region, dissimilar metal weld joints are more susceptible to SCC than the bulk steels in the simulated high temperature water environment of pressurized water reactor (PWR). Tensile residual stress (RS), in addition to operating loads, has a great contribution to SCC crack growth. Limited experimental conditions, varied influence factors and diverging experimental data make it difficult to accurately predict the SCC behavior of DMW joints with complex geometry, material configuration, operating loads and crack shape. Based on the film slip/dissolution oxidation model and elastic-plastic finite element method (EPFEM), an approach is developed to quantitatively predict the SCC growth rate of a RPV outlet nozzle DMW joint. Moreover, this approach is expected to be a pre-analytical tool for SCC experiment of DMW joints in PWR primary water environment.

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“…where the oxidation rate constant  a is 7.478×10 -7 , the exponent of current decay curve m is 0.5 [19]. Fig.…”

Section: Scc Growth Ratementioning

confidence: 98%

Numerical investigation on stress corrosion cracking behavior of dissimilar weld joints in pressurized water reactor plants

Zhao¹,

Xue²,

Yang³

et al. 2014

Frattura Ed Integrità Strutturale

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show abstract

“…Once the displacement discontinuities are obtained at nodes, the stress intensity factors K I , K II and K III can be easily determined using the following relations [14]:…”

Section: Calculation Of Fracture Mechanics Parametersmentioning

confidence: 99%

Growth simulation for 3D surface and through-thickness cracks using SGBEM-FEM alternating method

Park

Nikishkov

2011

J Mech Sci Technol

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An SGBEM-FEM alternating method had been proposed by Nikishkov, Park and Atluri for the analysis of three-dimensional planar and non-planar cracks and their growth. The proposed method is an effective method for fatigue or stress corrosion crack growth simulation. During crack growth simulation, however, an oscillation phenomenon is observed in crack advance or stress intensity factor distribution. If oscillating amplitude in SIF or crack advance does not decrease during next increment steps, the crack growth simulation fails. In this paper several methods are examined to remove the oscillation phenomenon. As a result, it is found that smoothing in stress intensity factor distribution or in crack front geometry can remove or weaken the oscillation phenomenon. Using the smoothing techniques, stress corrosion crack growth simulation is performed for a semi-elliptical surface crack and a through-thickness crack embedded in a plate. Crack front shape and stress intensity factor distribution are obtained after each increment during the crack growth. And the depth and length of a crack are obtained as a function of time. It is noted that the SGBEM-FEM alternating method is a very effective method for SCC growth simulation for a surface crack and a through-thickness crack.

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“…CGR can thus be obtained in an explicit form from Eqs. (22), (18), and (19) by substituting ðdK=daÞ def for @K=@a.…”

Section: Cgr Equationsmentioning

confidence: 99%

“…Selection of a proper r 0 value is an issue under investigation. 13,14,18) When r 0 is set to 5 Â 10 À6 m, the values of i 0 , t 0 , and m, respectively, become 1:10 Â 10 3 A/m 2 , 9:25 Â 10 À3 s, and 0.707, indicating that a higher value of m is obtained if a smaller r 0 is chosen. Typical values of " f are considered to range from 5 Â 10 À4 to 5 Â 10 À3 .…”

Section: Calculation Examples 1 Oxidation Current Parameters Andmentioning

confidence: 99%

Modification of the FRI Crack Growth Model Formulation from a Mathematical Viewpoint

Hashimoto

Koshiishi

2009

Journal of Nuclear Science and Technology

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The FRI model of crack growth, which incorporates mechanical properties into the slip oxidation mechanism of crack advance, is an extension of the well-known Ford-Andresen model. When the exponent of the oxidation current decay curve is set close to 1, however, the FRI model gives an infinite crack growth rate. Here, the oxidation decay curve integral is revised to eliminate this divergence, and modified crack growth rate equations are derived. Also presented here is a procedure for determining the oxidation current parameters from the curve-fitting to measurements of crack growth rate. Parameter value determination and crack growth calculations are illustrated for cold-worked Type 316L stainless steel.

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Development of a fundamental crack tip strain rate equation and its application to quantitative prediction of stress corrosion cracking of stainless steels in high temperature oxygenated water

Cited by 75 publications

References 14 publications

Numerical investigation on stress corrosion cracking behavior of dissimilar weld joints in pressurized water reactor plants

Numerical investigation on stress corrosion cracking behavior of dissimilar weld joints in pressurized water reactor plants

Growth simulation for 3D surface and through-thickness cracks using SGBEM-FEM alternating method

Modification of the FRI Crack Growth Model Formulation from a Mathematical Viewpoint

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