Surface Crack Growth Behavior of Structural Metals in High Temperature Water Environments

Prater, T. A.; Catlin, William R.; Coffin, L. F.

doi:10.1115/1.3225837

Cited by 16 publications

(2 citation statements)

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“…(b) Resolution --Reported elsewhere (6) are the results of a study of surface crack growth of nuclear structural steels used for piping and pressure vessel applications tested under cyclic loading in high temperature water environments. Geometries and testing procedures were similar to those in the experiments described above with the exception that the specimens contained semicircular defects and three active probe pairs straddled the defect.…”

Section: Applicationsmentioning

confidence: 99%

“…(a) Determination of crack size and shape --The technique has been used extensively to study the change in size and shape of surface cracks in high temperature water environments under static and cyclic loading, (6). A potential field solution for an ellipsoidal cavity in an infinite solid was derived, (7), and from this the inverse solution was obtained, such that the best-fitting semi-ellipse could be found from the output of three or more active probe pairs straddling the crack.…”

Section: Applicationsmentioning

confidence: 99%

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Damage Monitoring, Life Prediction and Life Extension

Coffin

1987

Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials

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Synopsis: In this paper the concept of in-situ, on-line damage monitors for use in service components where safety, high performance or severe environmental requirements is described. Particular attention is given to applications where low cycle fatigue is of concern. The purpose of these monitors is to provide useful information regarding the damage state of critical components during plant operation rather than to depend on the extrapolation of the up-front design process or on intermittent inspection to estimate performance. Some examples are given of damage monitors currently in use or under development for nuclear boiling water plant applications using the reversing .dc electrical potential technique. The concept of remaining life as an on-line process is described. The use of smart monitor that can measure and assess the present and future damage state of a given component and provide the plant operator with important operational information about his plant is discussed. INTRODUCTIONThis paper is essentially a sequel to a talk given by me at the "Symposium on Low Cycle Fatigue-Directions for the Future", an international meeting held in Bolton Landing, New York in October, 1985. My subject there was "Some Perspectives on Future Directions in Low Cycle Fatigue" (1). In that paper I attempted to predict five areas of future activities that would be of importance in the field of fatigue in the next thirty years. One of these areas dealt with high performance components and those structures subjected to severe environmental conditions and the need for damage monitoring, life prediction and life extension of those components. It is a subject which has been of great interest to me in recent years, (2), and is the topic I would like to explore further in this lecture.In the paper referred to above, I indicated that the design and life prediction assessment of structural components was by and large an "up front" process. By that I mean the design is predicated on the best judgement that the designer can make of the design life of the structure before the structure is actually built, using all of the tools at his disposal for the purpose. Obviously the process is an extrapolative one where the uncertainties in loadings, materials performance, manufacturing processes, and environment during actual operation may be such as to cause eventual problems such that the design life of the component cannot be achieved. This is of particular importance in high performance components, and/or those involving public safety. In these cases a possible course of action could be to make appropriate measurement and interpretation of progressive damage during operation. From the damage information gathered in While this topic has been of great interest in recent years in the fossil power generation industry (3), my aim in this paper is to consider its broader application particularly in those structural components subjected to fatigue, and more specifically, to low cycle fatigue. The emphasis will be mostly on monitoring aspects and wi...

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Damage Monitoring, Life Prediction and Life Extension

Coffin

1987

Low Cycle Fatigue and Elasto-Plastic Behaviour of Materials

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Stress Corrosion Cracking of Low Alloy Steels under BWR Conditions; Assessment of Crack Growth Rate Algorithms

Ford¹,

Horn

Hickling³

et al. 1999

Ninth International Symposium on Environmental Degradation of Materials in Nuclear Power Systems—Water Reactors

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A Refined One‐Slit‐Ring Method to Quantify Residual Hoop Stress in Chlorinated Polyvinyl Chloride Pipe—Application to Specimens After Immersion in Primer

Chen

Jar

Mertiny

et al. 2019

Polymer Engineering & Sci

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A refined one‐slit‐ring method is presented to characterize residual hoop stress distribution in pipe ring specimens of inhomogeneous cross section. Although the original one‐slit‐ring method enables determination of residual hoop stress distribution through slitting single ring specimen in the axial direction, its use is limited to specimens of uniform material properties. This work is to extend applicability of the method to ring specimens with a cross section of core–shell structure. Chlorinated polyvinyl chloride (CPVC) pipe is used in the study, and core–shell structure in its ring specimens is introduced through immersion in primer for 30 min. Analytical expression for the residual hoop stress distribution in these specimens is derived, and verified using finite element (FE) simulation which uses a temperature gradient field to generate stress so that diametrical change by the slitting is same as that measured experimentally. Results from the analytical expression agree well with those from the FE simulation, showing decrease of the residual hoop stress by the exposure to primer, and the extent of decrease depends on the drying time after the immersion in primer, to about half of its original value after 30 days of drying, and then remains relatively constant afterwards. POLYM. ENG. SCI., 59:E296–E309, 2019. © 2019 Society of Plastics Engineers

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Surface Crack Growth Behavior of Structural Metals in High Temperature Water Environments

Cited by 16 publications

References 0 publications

Damage Monitoring, Life Prediction and Life Extension

Damage Monitoring, Life Prediction and Life Extension

Stress Corrosion Cracking of Low Alloy Steels under BWR Conditions; Assessment of Crack Growth Rate Algorithms

A Refined One‐Slit‐Ring Method to Quantify Residual Hoop Stress in Chlorinated Polyvinyl Chloride Pipe—Application to Specimens After Immersion in Primer

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