Some selected topics in creep cavitation

Delph, T. J.

doi:10.1007/s11661-002-0099-0

Cited by 12 publications

(1 citation statement)

References 50 publications

(17 reference statements)

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“…Elongation, a form of aspect ratio, becomes as a significant indicator for coalescence based on these observations. The relationship between cavity size and cavity density number distribution, as a function of aspect ratio (defined as the ratio of minor to major diameter), was demonstrated [36], where typically, large cavities have a small aspect ratio, while small cavities have a larger aspect ratio. Flatness (F) and elongation (e) are forms of aspect ratio where the flatness represents the ratio of the intermediate axis (B) to the minor axis (T), while the elongation represents the ratio of the longest major axis (L) to the average length of the other two axes (intermediate and minor) [24],…”

Section: Characteristics Of Partial Coalescence and Hypothesismentioning

confidence: 99%

Accurate determination of creep cavity nucleation rate and growth rate with considering the partial coalescence prior to rupture and its impact on creep lifetime prediction

Abdelrehim,

Lu,

2024

Preprint

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In high-temperature applications such as power generation and aerospace, understanding material failure due to creep deformation is crucial, especially for components like jet engine compressor blades and steam turbines. This study investigates the evolution of creep cavitation damage, focusing on cavity nucleation, growth, and coalescence in the material's microstructure. Beyond nucleation and growth, this study investigates cavity coalescence, an inevitable process leading to microcracks and macrocracks. It captures the evolution of exact cavity measurements. This mechanism is associated with an increasing nucleation rate and a decreasing growth rate of individual cavities. Enhancing the accuracy of tensile creep behaviour models, this study extends the cavitation model initially proposed by Riedel and calibrated by Qiang Xu. It addresses cavity coalescence during late-stage rupture using high-fidelity experimental data and a modelling approach. A spherical reconstruction hypothesis for cavity coalescence is proposed and validated with cavitation data from the brass alloy Cu-40Zn-2Pb. The model demonstrates accuracy for lifetime modelling with an increase of accuracy from traditionally 45–83% and a coefficient of determination from 0.767 to 0.997, highlighting its robustness for describing coalescence and aiding in design and maintenance assessments.

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Section: Characteristics Of Partial Coalescence and Hypothesismentioning

confidence: 99%

Accurate determination of creep cavity nucleation rate and growth rate with considering the partial coalescence prior to rupture and its impact on creep lifetime prediction

Abdelrehim,

Lu,

2024

Preprint

View full text Add to dashboard Cite

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Failure Models: Performance and Service Requirements for Metals

Collins

Potirniche

Daniewicz

2015

Mechanical Engineers' Handbook

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This chapter summarizes the mechanical failure modes most commonly observed in practice followed by a brief description of each one. For uniaxial loading of a machine or structural element, the total elastic deformation of the member may be found by integrating the elastic strain over the length of the element. The two most widely accepted theories for predicting the onset of yielding are the distortion energy theory and the maximum shearing stress theory. Computer‐controlled fatigue testing machines are widely used in all modern fatigue testing laboratories. Three commonly used methods for extrapolating short‐time creep data to long‐term applications are the abridged method, the mechanical acceleration method, and the thermal acceleration method. Erosion corrosion is influenced by the velocity of the flowing corrosive medium, turbulence of the flow, impingement characteristics, concentration of abrasive solids, and characteristics of the metal alloy surface exposed to the flow.

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Microstructure and Crack‐Enhanced Elasto – Delayed‐Elastic – Viscous Models

2022

Engineering Physics of High‐Temperature Materials

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Some selected topics in creep cavitation

Cited by 12 publications

References 50 publications

Accurate determination of creep cavity nucleation rate and growth rate with considering the partial coalescence prior to rupture and its impact on creep lifetime prediction

Accurate determination of creep cavity nucleation rate and growth rate with considering the partial coalescence prior to rupture and its impact on creep lifetime prediction

Failure Models: Performance and Service Requirements for Metals

Microstructure and Crack‐Enhanced Elasto – Delayed‐Elastic – Viscous Models

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