Non-destructive methods for materials' state awareness monitoring
Abstract:Electromagnetic, thermoelectric and other non-destructive evaluation methods offer unique opportunities for materials' state awareness monitoring. A variety of sensors can be built based on these principles to detect and quantitatively characterise subtle environmentally-assisted and/or service-related changes in the state of metals, such as microstructural evolution, phase transformation, plastic deformation, hardening, residual stress relaxation, increasing dislocation density, etc. In most cases, the detection sensitivity is sufficiently high for the purposes of materials' state awareness monitoring and the feasibility of the sensing method is mainly determined by its selectivity, or the lack of it, to a particular type of damage mechanism. This paper reviews recent developments in electromagnetic and thermoelectric materials characterisation and offers a feasibility assessment of these non-destructive methods through a couple of representative examples of broad interest.
Document Type: Research Article
Affiliations: Department of Aerospace Engineering, University of Cincinnati, Cincinnati, Ohio 45221, USA and the UK Research Centre in Nondestructive Evaluation, Imperial College, London SW7 2AZ, UK.
Publication date: February 1, 2010
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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