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Dissertations / Theses on the topic 'Nondestructive characterization'

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Published: 4 June 2021
Last updated: 26 July 2025

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1

Ou, Runqing. "Nondestructive characterization of polyaniline emeraldine base films." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/9143.

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2

Imbert, de Smirnoff Severine. "Nondestructive Flaw Characterization in a Unidirectional Composite Plate." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/ImbertdeSmirnoffS2002.pdf.

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3

Tenney, Charles M. "Impedance-based Nondestructive Evaluation for Additive Manufacturing." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/99966.

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Impedance-based Non-Destructive Evaluation for Additive Manufacturing (INDEAM) is rooted in the field of Structural Health Monitoring (SHM). INDEAM generalizes the structure-to-itself comparisons characteristic of the SHM process through introduction of inter-part comparisons: instead of comparing a structure to itself over time, potentially-damaged structures are compared to known-healthy reference structures. The purpose of INDEAM is to provide an alternative to conventional nondestructive evaluation (NDE) techniques for additively manufactured (AM) parts. In essence, the geometrical comple
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4

Lee, Joon Pyo. "ULTRASONIC TRANSDUCER MODELING FOR ACOUSTIC MICROSCOPY & ITS APPLICATION IN BIOLOGICAL MATERIAL CHARACTERIZATION." Diss., The University of Arizona, 2005. http://hdl.handle.net/10150/193785.

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The determination of material properties for very small specimens such as biological cells or semiconductor microchips is extremely difficult and has been a challenging issue for several decades. One important constraint during these measurements is not to harm the specimens during the test process because the specimens, biological cells in particular, are vulnerable to the test itself even during a short period of testing time.Nondestructive evaluation (NDE) is the only suitable precess for such applications. It is fast, causes no disturbance and can give a real time response while being co
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5

Johnson, Marcus James. "Pulsed eddy-current measurements for materials characterization and flaw detection." Thesis, University of Surrey, 1997. http://epubs.surrey.ac.uk/966/.

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6

Foreman, Cory. "Nondestructive detection and characterization of damages in honeycomb composite structures." [Ames, Iowa : Iowa State University], 2008.

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7

Raparelli, Raymond Q. "Modal analysis applied to the nondestructive characterization of pile lengths." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/20011.

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8

Ghosh, Triguna. "Nondestructive characterization of plates with an emphasis on civil infrastructure." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282426.

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This work is aimed at developing a methodology for inspecting large plates, used in civil infrastructure, by Lamb waves. The traditional methods inspecting infrastructure are based on scattering of elastic waves from internal defects and on time of flight measurements. The methods based on elastic wave scattering can only detect defects larger than the wavelength of ultrasound used. The time of flight measurements have proven to be unreliable for strength analysis. This work investigates the potential of the Lamb wave technique to detect small defects when Lamb waves propagate over large dista
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9

Cherry, Matthew Ryan. "Rapidly Solving Physics-Based Models for Uncertainty Propagation in Nondestructive Evaluation." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright151317135171711.

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10

Kmack, Richard Matthew. "Characterization of air voids in fresh cement paste through ultrasonic nondestructive testing." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24794.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2009.<br>Committee Chair: Jacobs, Laurence; Committee Co-Chair: Kurtis, Kimberly; Committee Member: DesRoches, Reginald.
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11

曾偉明 and Wai-ming Peter Tsang. "Computer aided ultrasonic flaw detection and characterization." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31231007.

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12

Al-Akhras, Nabil M. "Characterization and deterioration detection of portland cement concrete using ultrasonic waves." Diss., This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06062008-170019/.

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13

Haoyan, Zhou United States. "DEVELOPE OF ULTRASOUND ELASTOGRAPHY FOR NONDESTRUCTIVE AND NONINVASIVE CHARACTERIZATION OF STIFFER POLYMERIC BIOMATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1440685144.

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14

Punurai, Wonsiri. "Cement-based materials' characterization using ultrasonic attenuation." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-04042006-171125/.

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Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006.<br>Dr. Jennifer Michaels, Committee Member ; Dr. Jacek Jarzynski, Committee Member ; Dr. Jianmin Qu, Committee Member ; Dr. Laurence J. Jacobs, Committee Chair ; Dr. Kimberly E. Kurtis, Committee Co-Chair.
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15

Pruell, Christoph. "Generation and detection of lamb waves for the characterization of plastic deformation." Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/26479.

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Thesis (M. S.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Jacobs, Laurence; Committee Member: Kim, Jin-Yeon; Committee Member: Qu, Jianmin. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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16

Welter, John T. "Oblique angle pulse-echo ultrasound characterization of barely visible impact damage in polymer matrix composites." University of Dayton / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1575295152635788.

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17

Zeitvogel, Daniel Tobias. "Characterization of damage due to stress corrosion cracking in carbon steel using nonlinear surface acoustic waves." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/45809.

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Cold rolled carbon steel 1018C is widely used in pressurized fuel pipelines. For those structures, stress corrosion cracking (SCC) can pose a significant problem because cracks initiate late in the lifetime and often unexpectedly, but grow fast once they get started. To ensure a safe operation, it is crucial that any damage can be detected before the structural stability is reduced by large cracks. In the early stages of SCC, microstructural changes occur which increase the acoustic nonlinearity of the material. Therefore, an initially monochromatic Rayleigh wave is distorted and measurable hi
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18

In, Chi-Won. "Defect characterization in heterogeneous civil materials using ultrasound." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47545.

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Asphalt and Portland cement concrete constitutes a significant portion of the total infrastructure all over the world. It has been reported that much of this concrete infrastructure is now approaching or has already passed its original design life. Thus it is critical to be able to quantitatively assess the condition of these concrete components. In order to rehabilitate or repair the civil infrastructure, nondestructive evaluation (NDE) techniques have been of great interest for infrastructure management agencies. However concrete components present several specific NDE challenges that must b
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19

Wang, Peng. "Characterization of Porous Low-κ Dielectric Films by Combined Scattering Techniques". University of Cincinnati / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1181920566.

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20

G, Kelekanjeri V. Siva Kumar. "Non-destructive Electrical Characterization of Controlled Waspaloy Microstructures." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14561.

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In this research, controlled Waspaloy microstructures were produced with the objective of studying microstructural evolution in this alloy via electrically-based ac/dc non-destructive techniques. Correlations were developed between electrical measurements and alternate characterization techniques such as Ultra Small Angle X-ray Scattering (USAXS), Scanning Electron Microscopy (SEM) and X-ray Diffraction (XRD) to gain a complete understanding of the microstructural transformations and the associated mechanisms. Three different sets of controlled microstructures were produced in this research. I
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21

Li, Zhi. "Three-Dimensional Optical Characterization of Heterogeneous Polymer Systems." Thesis, Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5008.

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In order to truly understand the process-property behavior of polymer systems it is essential to identify the three dimensional structure of the materials fabricated. For heterogeneous polymer systems such as nanoparticle filled systems, determination of the three dimensional optical properties are particularly difficult. Such information is essential, however, if the behavior of these systems are to be understood and formalized. The purpose of the present research was to develop methods for measuring the optical characteristics of heterogeneous polymer systems nondestructively, in order to c
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22

Whelchel, Ricky Lee. "Characterization of a nickel-base superalloy through electrical resistivity-microstructure relationships facilitated by small angle scattering." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41130.

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Nickel-base superalloys obtain high temperature mechanical properties through formation of precipitate phases formed via heat treatment. The precipitate microstructure evolves with heat treatment or thermal exposure, which can lead to degrading mechanical properties. This project focuses on the use of electrical resistivity as a non-destructive testing method to monitor the precipitate phase in Waspaloy (a polycrystalline nickel-base superalloy). The evolution of the precipitate microstructure is characterized throughout the volume of the specimens using both small angle neutron scattering (SA
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23

Wu, Xingyi. "Cu-catalyzed chemical vapour deposition of graphene : synthesis, characterization and growth kinetics." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/270012.

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Graphene is a two dimensional carbon material whose outstanding properties have been envisaged for a variety of applications. Cu-catalyzed chemical vapour deposition (Cu-CVD) is promising for large scale production of high quality monolayer graphene. But the existing Cu-CVD technology is not ready for industry-level production. It still needs to be improved on some aspects, three of which include synthesizing industrially useable graphene films under safe conditions, visualizing the domain boundaries of the continuous graphene, and understanding the kinetic features of the Cu-CVD process. This
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24

Hall, James Stroman. "Adaptive dispersion compensation and ultrasonic imaging for structural health monitoring." Diss., Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/41159.

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Ultrasonic guided wave imaging methods offer a cost-effective mechanism to perform in situ structural health monitoring (SHM) of large plate-like structures, such as commercial aircraft skins, ship hulls, storage tanks, and civil structures. However, current limits in imaging quality, environmental sensitivities, and implementation costs, among other things, are preventing widespread commercial adoption. The research presented here significantly advances state of the art guided wave imaging techniques using inexpensive, spatially distributed arrays of piezoelectric transducers. Novel adaptiv
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25

Elmushyakhi, Abraham. "In-Plane Fatigue Characterization of Core Joints in Sandwich Composite Structures." University of Dayton / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1510678155755824.

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26

Yan, Guqi. "Zero-group-velocity Lamb modes in laser ultrasonics : fatigue monitoring and material characterization." Thesis, Le Mans, 2018. http://www.theses.fr/2018LEMA1026/document.

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Ces dernières années, les modes de Lamb à vitesse de groupe nulle (ZGV) se sont révélés être un outil efficace pour sonder localement et précisément l'épaisseur d'un échantillon ou les propriétés mécaniques de matériaux isotropes ou anisotropes. Ce type particulier d'ondes guidées, telles de fortes résonances locales de la structure, résulte de l'interférence de deux ondes de Lamb ayant une vitesse de phase opposée et coexistant pour un couple fréquence-nombre d'ondes particulier. Les ultrasons laser ont démontré leur capacité à générer et détecter efficacement de t
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27

Silva, Francisco EstÃnio da. "Reconhecimento de PadrÃes AtravÃs de AnÃlises EstatÃsticas e Fractais Aplicadas a Dados de Ensaios NÃo-Destrutivos." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7330.

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FundaÃÃo de Amparo à Pesquisa do Estado do CearÃ<br>Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>In this work a procedure is studied for pattern classification related to different types of data, namely: (1) signals obtained from ultrasonic testing ( pulse-echo technique) and magnetic signals obtained from BarkhÃusen noise in samples of ferritic-pearlitic carbon steel tubes which, due to temperature effects, have shown microstructural changes as consequence of the total or partial transformation of the pearlite into spherodite; (2) images built from TOFD ultrasonic
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28

Boeri, Daniel Verga. "Caracterização de materiais compostos por ultra-som." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-05092006-122052/.

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Este trabalho apresenta duas técnicas de ensaios não-destrutivos por ultra-som realizados em um tanque com água para determinar as constantes elásticas de materiais compostos de fibra de vidro/epóxi. A primeira técnica é a transmissão direta utilizando um par de transdutores. A segunda é a técnica de pulso-eco, utilizando um único transdutor. A água do tanque atua como um acoplante para transferir a energia mecânica do transdutor para a amostra. Como o transdutor não fica em contato direto com a amostra, pode-se garantir um acoplamento constante. O sistema de medição dota de um dispositivo que
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29

Hetti, Mimi. "Synthesis and Characterization of Polymeric Magnetic Nanocomposites for Damage-Free Structural Health Monitoring of High Performance Composites." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-211082.

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The poly(glycidyl methacrylate)-modified magnetite nanoparticles, Fe3O4-PGMA NPs, were investigated and applied in nondestructive flaw detection of polymeric materials in this research. The Fe3O4 endowed magnetic property to the materials for flaw detection while the PGMA promoted colloidal stability and prevented particle aggregation. The magnetite nanoparticles (Fe3O4 NPs) were successfully synthesized by coprecipitation and then surface-modified with PGMA to form PGMA-modified Fe3O4 NPs by both grafting-from and grafting-to approaches. For the grafting-from approach, the Fe3O4 NPs were surf
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30

Clay, Arthur C. (Arthur Chisholm) 1971. "Development and experimental characterizaton of ultrasonic phased arrays for nondestructive testing." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/10032.

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31

SOUZA, EDVALDO R. de. "Caracterizações microestruturais e avaliações das propriedades mecânicas das juntas em aço inoxidável AISI 301 L soldadas por MIG e submetidas ao reparo pelo processo TIG." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26797.

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Submitted by Claudinei Pracidelli (cpracide@ipen.br) on 2016-11-11T09:40:30Z No. of bitstreams: 0<br>Made available in DSpace on 2016-11-11T09:40:30Z (GMT). No. of bitstreams: 0<br>A soldagem tem grande importância no setor metroferroviário, pois é empregada na fabricação de componentes estruturais e no acabamento de vagões de passageiros, que em sua maior parte são de aço inoxidável. As juntas soldadas podem apresentar descontinuidades que são interrupções que afetam as propriedades mecânicas e metalúrgicas da junta soldada. A presença destas descontinuidades, dependendo do seu tamanho, natur
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32

Mori, Eva Kaiser. "Caracterização de pinturas do artista Alfredo Volpi por meio de métodos não destrutivos: espectrofotômetro, EDXRF, MEV e imageamento multiespectral." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/44/44144/tde-17112015-151200/.

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Alfredo Volpi (1896 - 1988) é um dos mais importantes pintores brasileiros contemporâneos. Sua extensa obra foi marcada, principalmente, por composições cromáticas e abstrações geométricas. Foi um artista que dava importância muito grande à técnica e aos materiais, tendo desenvolvido uma maneira própria e sistemática de trabalhar: confeccionava suas próprias telas, tintas e até pigmentos, com terras naturais. Analisou-se ao todo 11 pinturas a têmpera em diversos suportes (tela, aglomerado de madeira e mural), 10 delas realizadas na década de 1950, período em que a obra do artista passou
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33

Diaz, Rene Orlando. "In-situ stress measurements of EB-PVD thermal barrier coatings using synchrotron x-ray diffraction under thermo-mechanical loading." Honors in the Major Thesis, University of Central Florida, 2010. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1406.

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This item is only available in print in the UCF Libraries. If this is your Honors Thesis, you can help us make it available online for use by researchers around the world by following the instructions on the distribution consent form at http://library.ucf.edu/Systems/DigitalInitiatives/DigitalCollections/InternetDistributionConsentAgreementForm.pdf You may also contact the project coordinator, Kerri Bottorff, at kerri.bottorff@ucf.edu for more information.<br>Bachelors<br>Engineering and Computer Science<br>Mechanical and Aerospace Engineering
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34

"Spectroscopic ellipsometer for non-destructive characterization of semiconductors." Chinese University of Hong Kong, 1993. http://library.cuhk.edu.hk/record=b5887759.

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by Kwong-hon Lee.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1993.<br>Includes bibliographical references (leaves [112-115]).<br>Chapter CHAPTER 1. --- INTRODUCTION<br>Chapter CHAPTER 2. --- PRINCIPLE OF ELLIPSOMETER<br>Chapter CHAPTER 3. --- MATHEMATICAL REPRESENTATION OF ELLIPSOMETRY<br>Chapter Section 3.1 --- Ambient Substrate<br>Chapter Section 3.2 --- Single Layer (Ambient-film substrate)<br>Chapter Section 3.3 --- Multilayer system (Isotropic Stratified planar structure)<br>Chapter CHAPTER 4. --- CLASSIFICATION OF ELLIPSOMETER<br>Chapter Section 4.1 --- Null-type Ellipsometer<
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35

金佑軒. "Ultrasonic Nondestructive Evaluation Techniques for the Characterization of Non-homogeneous Hydrogen Concentration in Zircaloy." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/69305769977704340638.

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36

Kgomari, Lerato Criscelda. "Microstructural characterization of laser formed high-strength-low-alloy (HSLA) steel." Thesis, 2010. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000591.

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Thesis (MTech. : Engineering Metallurgy.)--Tshwane University of Technology, 2010.<br>Establish a qualitative and quantitative comparison between the parameters of the laser used in manufacturing a 120 mm curvature in HSLA steel parts and the micro-structural changes in the steel part. Subsequently, the final microstructure will be used to determine the reason for the poor fatigue performance of the HSLA steel after laser forming.
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37

Tang, Sheng-Wei, and 湯盛瑋. "Development of Nondestructive Measurement Technique for the Characterization of Layer Properties in Solid Oxide Fuel Cells." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/7gu7wc.

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博士<br>國立臺北科技大學<br>機電科技研究所<br>97<br>Solid oxide fuel cell (SOFC) has the advantage of high efficiency in converting the chemical energy to electricity. The main structure of SOFC is a three-layered structure with the electrolyte sandwiched by anode and cathode. Yttria stabilized zirconia (YSZ) is generally the material of electrolyte due to its high ionic conductivity and stable physical and chemical properties. However, YSZ has oxygen ionic conductivity only in the high operation temperature of 500℃ to 1000℃. The ceramic structure of YSZ also suffers the difficulties in the control of geometri
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38

Taghavipour, Saber. "Characterization of concrete materials using non-destructive wave-propagation testing techniques." Thesis, 2017. http://hdl.handle.net/1959.7/uws:45504.

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Non-destructive testing (NDT) of concrete members has been widely used for characterisation of material and assessment of functional structures without impairing their functions and performances. This thesis focuses on addressing critical challenges related to the practical implementation of NDT techniques based on wave-propagation approaches for characterisation of concrete members used in civil infrastructures. Specially, this research aims to achieve three interdependent objectives related to developing NDT techniques with piezoceramic-based transducers: monitoring of very early-age concret
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