Comparing Techniques for Quantification of Creep Cavities

Siqi He; Peter E J Flewitt; David M Knowles; Tomas L Martin

Comparing Techniques for Quantification of Creep Cavities

Siqi He^*
, Peter E J Flewitt
, David M Knowles
, Tomas L Martin

^*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

160 Downloads (Pure)

Abstract

Creep cavitation is a key limitation for the life of a component acting under load at elevated temperatures. This paper compares several modern techniques available to characterize and understand the formation of creep cavities. Conventional 2D imaging techniques such as Scanning Electron Microscopy (SEM) and Focused Ion Beam (FIB) imaging characterize morphology and distribution over a large area, while scanning transmission electron microscopy (STEM) has higher resolution but limited sampling area. 3D imaging techniques such as X-ray Tomography (XRT) enable the characterization of creep cavities in three dimensions, however XRT can be limited in cavity identification due to resolution. To bridge the length-scale gap, FIB serial sectioning can reconstruct the creep cavities at a single grain boundary with a much higher resolution, whilst advancements in Plasma FIB enable this high resolution characterization over a larger reconstruction volume. For optimum creep cavitation characterization, multiple techniques should be used in complement with each other.

Original language	English
Title of host publication	PROCEEDINGS ESIA15–ISSI2019
Subtitle of host publication	Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK.
Editors	Brian Tomkins, Shan-Tung Tu, Peter EJ Flewitt, John K Sharples
Publisher	FESI Publishing
Chapter	2
Pages	194-203
Number of pages	9
ISBN (Print)	978-0-9935485-3-6
Publication status	Published - 19 Jan 2021

Keywords

Microstructure
Materials Characterisation
Creep cavitation

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1 Article (Academic Journal)

Creep damage initiation in high-temperature steel: a comparative study of ferritic, martensitic and austenitic microstructures
Galliopoulou, E. C., He, S., Salvini, M., Grilli, N., Martinez, G., Shang, H., Cocks, A. C. F., Siefert, J., Parker, J. & Martin, T. L., 28 Aug 2026, (Accepted/In press) In: npj Materials Degradation.
Research output: Contribution to journal › Article (Academic Journal) › peer-review

1 Finished

Rework of EPSRC: The Physics of Cavity Nucleation and Healing: An Experimental and Modelling Approach
Flewitt, P. E. J. (Principal Investigator)
1/10/18 → 30/10/22
Project: Research

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He, S., Flewitt, P. E. J., Knowles, D. M., & Martin, T. L. (2021). Comparing Techniques for Quantification of Creep Cavities. In B. Tomkins, S.-T. Tu, P. EJ. Flewitt, & J. K. Sharples (Eds.), PROCEEDINGS ESIA15–ISSI2019: Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK. (pp. 194-203). FESI Publishing. https://www.fesi.org.uk/product/proceedings-esia15-issi2019/

He, Siqi ; Flewitt, Peter E J ; Knowles, David M et al. / Comparing Techniques for Quantification of Creep Cavities. PROCEEDINGS ESIA15–ISSI2019: Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK.. editor / Brian Tomkins ; Shan-Tung Tu ; Peter EJ Flewitt ; John K Sharples. FESI Publishing, 2021. pp. 194-203

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title = "Comparing Techniques for Quantification of Creep Cavities",

abstract = "Creep cavitation is a key limitation for the life of a component acting under load at elevated temperatures. This paper compares several modern techniques available to characterize and understand the formation of creep cavities. Conventional 2D imaging techniques such as Scanning Electron Microscopy (SEM) and Focused Ion Beam (FIB) imaging characterize morphology and distribution over a large area, while scanning transmission electron microscopy (STEM) has higher resolution but limited sampling area. 3D imaging techniques such as X-ray Tomography (XRT) enable the characterization of creep cavities in three dimensions, however XRT can be limited in cavity identification due to resolution. To bridge the length-scale gap, FIB serial sectioning can reconstruct the creep cavities at a single grain boundary with a much higher resolution, whilst advancements in Plasma FIB enable this high resolution characterization over a larger reconstruction volume. For optimum creep cavitation characterization, multiple techniques should be used in complement with each other. ",

keywords = "Microstructure, Materials Characterisation, Creep cavitation",

author = "Siqi He and Flewitt, \{Peter E J\} and Knowles, \{David M\} and Martin, \{Tomas L\}",

year = "2021",

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day = "19",

language = "English",

isbn = "978-0-9935485-3-6",

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He, S, Flewitt, PEJ, Knowles, DM & Martin, TL 2021, Comparing Techniques for Quantification of Creep Cavities. in B Tomkins, S-T Tu, PEJ Flewitt & JK Sharples (eds), PROCEEDINGS ESIA15–ISSI2019: Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK.. FESI Publishing, pp. 194-203. <https://www.fesi.org.uk/product/proceedings-esia15-issi2019/>

Comparing Techniques for Quantification of Creep Cavities. / He, Siqi; Flewitt, Peter E J; Knowles, David M et al.
PROCEEDINGS ESIA15–ISSI2019: Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK.. ed. / Brian Tomkins; Shan-Tung Tu; Peter EJ Flewitt; John K Sharples. FESI Publishing, 2021. p. 194-203.

Research output: Chapter in Book/Report/Conference proceeding › Conference Contribution (Conference Proceeding)

TY - GEN

T1 - Comparing Techniques for Quantification of Creep Cavities

AU - He, Siqi

AU - Flewitt, Peter E J

AU - Knowles, David M

AU - Martin, Tomas L

PY - 2021/1/19

Y1 - 2021/1/19

N2 - Creep cavitation is a key limitation for the life of a component acting under load at elevated temperatures. This paper compares several modern techniques available to characterize and understand the formation of creep cavities. Conventional 2D imaging techniques such as Scanning Electron Microscopy (SEM) and Focused Ion Beam (FIB) imaging characterize morphology and distribution over a large area, while scanning transmission electron microscopy (STEM) has higher resolution but limited sampling area. 3D imaging techniques such as X-ray Tomography (XRT) enable the characterization of creep cavities in three dimensions, however XRT can be limited in cavity identification due to resolution. To bridge the length-scale gap, FIB serial sectioning can reconstruct the creep cavities at a single grain boundary with a much higher resolution, whilst advancements in Plasma FIB enable this high resolution characterization over a larger reconstruction volume. For optimum creep cavitation characterization, multiple techniques should be used in complement with each other.

AB - Creep cavitation is a key limitation for the life of a component acting under load at elevated temperatures. This paper compares several modern techniques available to characterize and understand the formation of creep cavities. Conventional 2D imaging techniques such as Scanning Electron Microscopy (SEM) and Focused Ion Beam (FIB) imaging characterize morphology and distribution over a large area, while scanning transmission electron microscopy (STEM) has higher resolution but limited sampling area. 3D imaging techniques such as X-ray Tomography (XRT) enable the characterization of creep cavities in three dimensions, however XRT can be limited in cavity identification due to resolution. To bridge the length-scale gap, FIB serial sectioning can reconstruct the creep cavities at a single grain boundary with a much higher resolution, whilst advancements in Plasma FIB enable this high resolution characterization over a larger reconstruction volume. For optimum creep cavitation characterization, multiple techniques should be used in complement with each other.

KW - Microstructure

KW - Materials Characterisation

KW - Creep cavitation

M3 - Conference Contribution (Conference Proceeding)

SN - 978-0-9935485-3-6

SP - 194

EP - 203

BT - PROCEEDINGS ESIA15–ISSI2019

A2 - Tomkins, Brian

A2 - Tu, Shan-Tung

A2 - Flewitt, Peter EJ

A2 - Sharples, John K

PB - FESI Publishing

ER -

He S, Flewitt PEJ, Knowles DM , Martin TL. Comparing Techniques for Quantification of Creep Cavities. In Tomkins B, Tu ST, Flewitt PEJ, Sharples JK, editors, PROCEEDINGS ESIA15–ISSI2019: Proceedings of the 15th International Conference on Engineering Structural Integrity Assessment and the 2019 International Symposium on Structural Integrity, held on May 8–9, 2019 in Manchester, UK.. FESI Publishing. 2021. p. 194-203

Comparing Techniques for Quantification of Creep Cavities

Abstract

Keywords

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Research output

Creep damage initiation in high-temperature steel: a comparative study of ferritic, martensitic and austenitic microstructures

Projects

Rework of EPSRC: The Physics of Cavity Nucleation and Healing: An Experimental and Modelling Approach

Cite this