Title:
Numerical analysis of intragrain precipitate influence on the linear scattering behavior

dc.contributor.advisor Jacobs, Laurence J.
dc.contributor.advisor Capolungo, Laurent
dc.contributor.advisor Kim, Jin-Yeon
dc.contributor.author Gruen, Daniel Nicholas
dc.contributor.department Civil and Environmental Engineering
dc.date.accessioned 2017-01-11T14:01:58Z
dc.date.available 2017-01-11T14:01:58Z
dc.date.created 2016-12
dc.date.issued 2016-08-31
dc.date.submitted December 2016
dc.date.updated 2017-01-11T14:01:58Z
dc.description.abstract Nondestructive evaluation using ultrasonic waves is commonly used to experimentally probe for the presence of defects (i.e. dislocations, precipitates, cracks) in complex metallic microstructures. Such defects and abnormalities are evidenced by monitoring the acoustic attenuation coefficient alpha. However, from a mathematical standpoint, the correlation between the microstructural behavior and the measured acoustic attenuation behavior is not yet explicit. The present work aims to assess the existence of statistical correlations between microstructural defects and acoustic attenuation. The effects of defect geometry, density, and geometrical arrangements (i.e. relative position) on acoustic attenuation are studied. To do so, the acoustic response of Fe-Cu single crystals containing 1% Cu precipitates with radii on the order of 2 nm is simulated by means of finite element analysis. Several thousand initial microstructures with random arrangement of precipitates are virtually tested using statistical methods, such as principal component analysis. Therefore, it is expected that a causal link can be made between the acoustic attenuation coefficient and the precipitates-induced microstructural behavior via the proposed numerical analysis.
dc.description.degree M.S.
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/56255
dc.language.iso en_US
dc.publisher Georgia Institute of Technology
dc.subject Numerical analysis
dc.subject Attenuation
dc.subject Scattering
dc.subject Precipitate
dc.title Numerical analysis of intragrain precipitate influence on the linear scattering behavior
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.advisor Jacobs, Laurence J.
local.contributor.advisor Kim, Jin-Yeon
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
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relation.isAdvisorOfPublication ca5cd146-65e7-4a52-9d0d-0449ef1dd19b
relation.isOrgUnitOfPublication 88639fad-d3ae-4867-9e7a-7c9e6d2ecc7c
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
thesis.degree.level Masters
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