Imperial College London
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DrJosephCorcoran

Faculty of Engineering, Department of Mechanical Engineering

Honorary Lecturer
 
 
 
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Contact

 

joseph.corcoran

 
 
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Location

 

563City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Jones:2022:10.1007/s10921-022-00855-4,
author = {Jones, E and Sciard, J and Corcoran, J},
doi = {10.1007/s10921-022-00855-4},
journal = {Journal of Nondestructive Evaluation},
title = {The Influence of Creep Induced Grain Boundary Separation on Electrical Non-destructive Evaluation Measurements},
url = {http://dx.doi.org/10.1007/s10921-022-00855-4},
volume = {41},
year = {2022}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Electrical resistivity-based measurements have been proposed as a viable solution for non-destructive evaluation of creep induced grain boundary separation. This study builds on effective medium theory to provide a modelling approach to investigate the viability of electrical Non-Destructive Evaluation methods for creep assessment by estimating the influence of a population of insulating inclusions. The increase in normalised electrical resistivity is proportional to the number of inclusions and their radius cubed. This study highlights that the validity of a previously proposed conductivity perturbation approach can be dramatically increased to large conductivity changes is a resistivity perturbation model is used in preference. A number of stochastic finite element studies are presented to show the non-interaction assumption, where the contribution of each inclusions is treated independently of all others, is remarkably robust even up to very high inclusion concentrations, and the influence of inclusion misalignment is also small. The challenges in stereology are highlighted, but an example micrograph of advanced creep damage is used to provide an order of magnitude estimate of the influence of creep induced grain boundary separation on electrical resistivity at 1–10%, a value which is certainly feasible using potential drop or eddy current non-destructive evaluation.
AU  - Jones,E
AU  - Sciard,J
AU  - Corcoran,J
DO  - 10.1007/s10921-022-00855-4
PY  - 2022///
SN  - 0195-9298
TI  - The Influence of Creep Induced Grain Boundary Separation on Electrical Non-destructive Evaluation Measurements
T2  - Journal of Nondestructive Evaluation
UR  - http://dx.doi.org/10.1007/s10921-022-00855-4
VL  - 41
ER  -
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