Relevant bibliographies by topics / Fractographic analysis

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Fractographic analysis'

Author: Grafiati
Published: 4 June 2021
Last updated: 24 January 2023

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Journal articles on the topic "Fractographic analysis"

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Quinn, George D. "A History of the Fractography of Brittle Materials." Key Engineering Materials 409 (March 2009): 1–16. http://dx.doi.org/10.4028/www.scientific.net/kem.409.1.

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The evolution of the science of fractography of brittle materials initially was driven by failure analysis problems. Early analyses focused on general patterns of fracture and how they correlated to the loading conditions. Many early documents are simply descriptive, but the curiosity of some key scientists and engineers was aroused. Scientific or engineering explanations for the observed patterns gradually were developed. Advances in microscopy and flaw based theories of strength and fracture mechanics led to dramatic advances in the state of the art of fractographic analysis of brittle materials. Introduction: This author was drawn backwards in time as he researched the current state of the art of fractographic analysis of brittle materials for his fractography guide book.[ ] Others have written about how the fractographic analysis of metals evolved (e.g., [ , , , ]), but there is no analogue for ceramics and glasses. The key scientists, engineers, and analysts who contributed to our field are shown in Fig. 1. Other work done by industry workers who were unable or loathe to publish is now lost, inaccessible, forgotten, or even discarded. It is the goal of this paper to review the key publications and mark the noteworthy advances in the field. Some deem fractography as the study of fracture surfaces, but this author takes a broader view. Fractography is the means and methods for characterizing fractured specimens or components and, for example, a simple examination of the fragments and how they fit together to study the overall breakage pattern is a genuine fractographic analysis.
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UCHIDA, Hitoshi, Shozo INOUE, Tomohiro MAEKAWA, and Keiji KOTERAZAWA. "Fractography. Fractographic Analysis of Stress Corrosion Cracking with Electron Channeling Patterns." Journal of the Society of Materials Science, Japan 46, no. 6 (1997): 597–601. http://dx.doi.org/10.2472/jsms.46.597.

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Maros, Maria Berkes, Nikoletta Kaulics Helmeczi, and Ján Dusza. "Qualitative and Quantitative Fractographic Analysis of Dynamically Impacted Si3N4 Ceramics." Materials Science Forum 589 (June 2008): 73–78. http://dx.doi.org/10.4028/www.scientific.net/msf.589.73.

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Si3N4 is widely used as a structural ceramic, therefore mechanical characterization, especially in dynamic loading conditions is important task. In the framework of a comprehensive research work aiming at characterizing the dynamic failure process of Si3N4 based ceramics we executed instrumented impact tests. Beside determining various mechanical characteristics we executed failure analysis by fractography, as well. The current paper focuses on the fractographic analysis of the dynamic failure processes of the investigated Si3N4 based ceramics. A detailed morphological analysis has been carried out determining qualitative and quantitative features using macro- and micro-fractography.
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Ivasenko, I. B., O. R. Berehulyak, and R. A. Vorobel. "Analysis of dimple shape on fractographic heat-resistant steel images." Information extraction and processing 2018, no. 46 (December 27, 2018): 34–37. http://dx.doi.org/10.15407/vidbir2018.46.034.

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Ghiban, Brandusa, Florentina Catalina Varlan, Marius Niculescu, and Dan Voinescu. "Fractographic Evaluation of the Metallic Materials for Medical Applications." Key Engineering Materials 745 (July 2017): 62–74. http://dx.doi.org/10.4028/www.scientific.net/kem.745.62.

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The manner of studying of the fracture modes could be done through fractography. Fractography is the study of fracture surface morphologies and it gives an insight into damage and failure mechanisms, underpinning the development of physically-based failure criteria. In composites research it provides a crucial link between predictive models and experimental observations. Fractographic methods are routinely used to determine the cause of failure in all engineering structures, especially in product failure and the practice of forensic engineering or failure analysis. In material science research, fractography is used to develop and evaluate theoretical models of crack growth behavior. One of the aims of fractographic examination is to determine the cause of failure by studying the characteristics of a fracture surface. Different types of crack growth produce characteristic features on the surface, which can be used to help identify the failure mode. The overall pattern of cracking can be more important than a single crack, however, especially in the case of brittle behavior materials. Initial fractographic examination is commonly carried out on a macro scale utilizing low power optical microscopy and oblique lighting techniques to identify the extent of cracking, possible modes and likely origins. When it is needed to identify the nature of failure, an analysis at high magnification is required and scanning electron microscopy (SEM) seems to be the best choice. The problem of fracture behavior of biometallic materials is a real one, being well and repeatedly presented in literature. Variations in alloy compositions can lead to subtle differences in mechanical, physical, or electrochemical properties. However, these differences are minor compared with the potential variability caused by differences in fabrication methodology, heat treatment, cold working, and surface finishing, where surface treatments are particularly important for corrosion and wear properties. The aim of this paper, therefore, is to summarize the different types of metals and alloys used as biomaterials, the corrosion of metals in the human body, and different failure damages of metallic implants.
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Lohbauer, Ulrich, Michael Wendler, Doreen Rapp, and Renan Belli. "Fractographic analysis of lithium silicate crown failures during sintering." SAGE Open Medical Case Reports 7 (January 2019): 2050313X1983896. http://dx.doi.org/10.1177/2050313x19838962.

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The two-step production process of glass-ceramic dental restorations involves a computer-aided design/computer-aided machining step followed by a crystallization firing for the final material properties to be achieved. Certain firing parameters are believed to trigger spontaneous fracture of crowns during the cooling process. In this study, cooling fractures have been reproducibly observed and investigated using fractography combined with material (glass transition temperature) and process (cooling rate) characterization. Stress distribution was visualized using birefringence measurements. Fractographic observations revealed fracture starting at the intaglio side of the crowns specifically at contact points with the support firing pins. Further analysis showed that a fast cooling rate was applied during the glass transition region. Thermal stresses were concentrated around the firing pin supports and released the fracture. To prevent such fractures, a slow cooling protocol below the glass transition temperature is our recommendation to dental technicians. Furthermore, the use of planar firing pad or paste supports is advised over the use of point contact supports.
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Fernandino, D. O., and R. E. Boeri. "Fractographic analysis of austempered ductile iron." Fatigue & Fracture of Engineering Materials & Structures 39, no. 5 (December 23, 2015): 583–98. http://dx.doi.org/10.1111/ffe.12380.

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Dusza, Jan. "Fractographic failure analysis of brittle materials." International Journal of Materials and Product Technology 15, no. 3/4/5 (2000): 292. http://dx.doi.org/10.1504/ijmpt.2000.001249.

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El-Sayed, Tamer, and Russell J. Hand. "Fractographic analysis of epoxy coated glass." Ceramics International 38, no. 3 (April 2012): 2543–49. http://dx.doi.org/10.1016/j.ceramint.2011.11.025.

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Moleko, Teboho C., Maina Maringa, and Willie B. Du Preez. "Fractography and Microstructural Analysis of As-Built and Stress Relieved DMLS Ti6Al4V (ELI) Plates Subjected to High Velocity Impact." Advances in Materials Science and Engineering 2022 (August 19, 2022): 1–14. http://dx.doi.org/10.1155/2022/9008244.

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This paper presents fractographic and microstructural analysis of as-built and stress relieved DMLS Ti6Al4V (ELI) plates with thicknesses of 8 mm, 10 mm, 12 mm, and 14 mm, impacted by high velocity projectiles. Fractography was performed through scanning electron microscopy on the surfaces of the projectile holes, while microstructural analysis of specimens extracted from the plates close to and far from the projectile holes was conducted by way of optical microscopy. Fractography revealed brittle behavior at the entry points of the penetration holes and ductile behavior at the exit points of the penetration holes. Microstructural analysis revealed microstructural changes in the alloy and a gradual increase of the β-phase fraction toward the edge of the projectile holes through all the plate thicknesses.
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Dissertations / Theses on the topic "Fractographic analysis"

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Feinberg-Ringel, Karen Stacey. "Quantitative fractographic analysis of Al[subscript]2O[subscript]3/Al-25%Li metal martrix composite." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/19987.

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Oliveira, Jeferson de. "Caracterização fratográfica de compósito de matriz metálica submetido a ensaios de impacto, flexão e fadiga." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/88/88131/tde-19042013-142334/.

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Este trabalho versa sobre a inspeção fratográfica por Microscopia Eletrônica de Varredura (MEV) e a análise micro-química por Energia Dispersiva de Raios-X de superfícies de fratura de um compósito particulado de matriz metálica (CMM = liga AA356 + SiC) manufaturado por compofundição e submetido a diferentes classes de ensaios mecânicos, a saber, impacto Charpy, flexão quase-estática e fadiga fletiva. A fratografia por MEV em modo de imageamento por elétrons secundários se mostrou uma poderosa ferramenta na análise dos aspectos topográficos de CMM particulados fraturados, que se relaciona diretamente ao aporte de energia (ou ao nível de tensão desenvolvido) para a criação da superfície de fratura, independentemente do tipo de solicitação mecânica aplicada. Mecanismos de tenacificação em CMM, tais como descolamento, trincamento e arrancamento de partículas de SiC da matriz metálica AA356 foram prontamente identificados e documentados por esta modalidade MEV, e correlacionados ao desempenho mecânico dos materiais investigados. Aglomeração de partículas de SiC, assim como a presença de poros e/ou vazios se revelaram freqüentemente como variáveis determinantes do desempenho mecânico do CMM em ensaios dinâmicos, quase-estáticos e cíclicos. MEV em modo de imageamento por elétrons retro-espalhados se mostrou extremamente útil na identificação de partículas de SiC aflorando em superfícies de fratura do CMM quando o emprego de elétrons secundários não foi bem sucedido na tarefa. Micro-análise química por EDS permitiu o mapeamento dos elementos Fe e Cr, além de Mn, e possibilitou classificá-los como formadores de precipitados potencialmente fragilizantes do CMM. Esta técnica também assegurou a identificação de reticulados ricos em Si ao redor dos glóbulos de fase pró-eutética (alfa), os quais (reticulados) são altamente favorecedores de fraturas intergranulares.
This work focuses on the fractographic inspection by Scanning Electron Microscopy (SEM) and micro-chemical analysis by Energy Dispersive X-Ray Spectroscopy (EDS) of fractured surfaces of a compocast particulate metal matrix composite (MMC = AA356 alloy + SiC) subjected to different classes of mechanical testing, namely, Charpy impact, quasi-static flexure and flexural fatigue. SEM fractography in secondary electron imaging mode has shown to be a powerful tool in analyzing topographic aspects of fractured particulate MMC, which are straightforwardly related to the energy apportion (or the developed stress level) to the fracture surface creation, regardless the applied mechanical loading type. Toughening mechanisms for MMC, such as SiC particle debonding, cracking and pulling-out from the metallic matrix AA356 alloy were promptly identified and documented through this SEM modality, and correlated to the mechanical performance of investigated materials. SiC particle clusters as well as pore and/or void presence were very often discovered as the main controlling variables of mechanical performance of MMC during dynamic, quasi-static and cyclic testing. SEM fractography in backscatted electron imaging mode has shown to be extremely useful on the identification of SiC particles emerging from fractured surfaces of MMC when secondary electron mode did not succeed in this task. EDS micro-chemical analysis allowed to map Fe and Cr, besides Mn, and permitted to classify them as potentially MMC-embrittling precipitated forming elements. This technique also assured the identification of Si-rich reticulated structure around pro-eutectic phase globules, which (reticulated structure) highly favors intergranular fracture.
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Machala, Jan. "Nízkocyklová únava niklové superslitiny IN713LC s TBC vrstvou za vysokých teplot." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230540.

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This thesis deals with the low cycle fatigue nickel-based superalloy IN713LC with applied TBC barrier at high temperature. The theoretical part is divided into four sections. The first one focuses on description of fatigue damage. The second one provides the basic characteristics of nickel-based superalloys. The third section describes the use of the surface layers - diffusion layers and thermal barriers and the fourth section deals with the influence of these layers on fatigue properties. Experimental part is focused on the evaluation of low cycle fatigue tests and on the explanation of the mechanisms of initiation and propagation of fatigue cracks. For the experimental part, fatigue samples were prepared by vacuum precision investment casting. TBC barrier was applied by atmospheric plasma spraying and consists of two sublayers - the lower metallic bond coating type CoNiCrAlY and top ceramic coating type YSZ. Low cycle fatigue tests were conducted under strain control at controlled temperature of 900 ° C. Fractographical analysis of fracture surfaces was carried out by using light and electron microscopy. Effect of applied barrier to fatigue life was determined - the parameters of Manson-Coffin and Basquin curve. A cyclic stress-strain curve was also obtained. The curves softening / hardening and number of transit cycles were determined. The obtained parameters and values from fatigue tests were compared with available data from fatigue tests of superalloy IN713LC without the layer, as applied AlSi type diffusion layer, at high temperatures. The initiation site on the fracture surfaces was determined within the fractographic evaluation and the influence of the layer on the initiation and propagation of fatigue cracks was discussed. A helpful tool was the assessment of longitudinal sections using scanning electron microscopy.
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Morel, Jean-Michel. "Rôle de la structuration des patines formées sur acier autopatinable vis-àvis de la résistance à la corrosion atmosphérique : Influence de la diminution des teneurs en SO2 dans les atmosphères post-industrielles." Thesis, La Rochelle, 2022. http://www.theses.fr/2022LAROS015.

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L’objectif du présent travail était de déterminer dans quelle mesure la réduction drastique des teneurs en SO2 des atmosphères post-industrielles a affecté la cinétique de corrosion des aciers autopatinables ainsi que leurs morphologie, composition chimique et structure cristalline. Les expérimentations ont couvert un large spectre de nuances d’acier, de durée d’exposition et de conditions de formation de ces patines. La structuration des patines a été étudiée avec notamment la mise en œuvre de fractographies cryogéniques ainsi que le suivi des cinétiques de corrosion. Les produits de corrosion des aciers autopatinables et des aciers conventionnels présentent une structuration similaire composée d’une couche de lépidocrocite stratifiée surmontant des produits de corrosion plus denses et plus protecteurs, généralement de la goethite. Ces produits formés localement s’étendent puis forment une couche protectrice relativement homogène. L’analyse des défauts présents dans les patines suggère un lien étroit entre leur densité et la vitesse de corrosion. Les éléments d’alliage joueraient alors un rôle dans la réduction de ces défauts mais les mécanismes exacts restent à établir. L’ensemble de ces résultats a conduit à remettre en question les paramètres du modèle prédictif de résistance à la corrosion de la norme ISO 9223 car ils ne sont pas adaptés à des environnements pauvres en SO2. Ils ont par ailleurs permis de proposer une méthode alternative et non destructive de suivi de la performance vis-à-vis de la corrosion des aciers faiblement alliés, cette famille englobant les aciers dits autopatinables
The aim of this work was to determine the extent to which the drastic reduction in SO2 levels in postindustrial atmospheres affected the corrosion kinetics of weathering steels as well as their morphology, chemical composition and crystallographic structure. The experiments covered a wide spectrum of steel grades, exposure time and conditions of formation of these patinas. The structuring of the patinas has been studied with in particular the implementation of cryogenic fractography as well as the kinetics corrosion monitoring. Corrosion products formed on weathering steels or on conventional steels have a similar structuration consisting of a layer of laminated lepidocrocite over denser and more protective corrosion products, usually goethite. These products extend up to forming a relatively homogeneous protective layer. The analysis of the defects of the patinas suggests a very close relation between their density and the corrosion rate. Alloying elements would then play a role in reducing these defects but the exact mechanisms remain to be established. All these results have led to questioning the parameters of the predictive corrosion resistance model of the ISO 9223 standard because they are not adapted to environments with very low level of SO2. They also made it possible to propose an alternative and on destructive method of monitoring the corrosion’s performance of low-alloy steels, this family encompassing so-called weathering steels
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Abdelal, Nisrin Rizek. "Effects of Voids on Delamination Behavior Under Static and Fatigue Mode I and Mode II." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1365418463.

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Banerji, Kingshuk. "Quantitative analysis of fracture surfaces using computer aided fractography." Diss., Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/15381.

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Filho, Aristides Alves Messias. "Estimativa da razão de carga a partir da análise fratográfica da relação entre a altura e espaçamento inter-estrias de uma liga de Alumínio aeronáutica AMS 7475-T7351." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18150/tde-01022016-153904/.

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Este trabalho visa determinar a razão de carga cíclica R através da medida, na superficie de fratura, da relação entre a largura inter-estrias (s) e a altura da estria (H). É de conhecimento que o espaçamento (s) se correlaciona com a taxa de crescimento da trinca da/dN, enquanto que a curva da/dN x ΔK depende da razão de carga R. Para esta avaliação, corpos de prova do tipo compacto C(T) foram extraídos na orientação LT do centro de uma placa laminada da liga de alumínio SAE-AMS 7475 T7351 para realização dos ensaios de propagação de trinca por fadiga. Estes ensaios foram realizados de duas formas diferentes. A primeira, para obtenção de dados relativos à região II da curva da/dN x ΔK, sendo, neste caso, utilizadas quatro diferentes razões de carga (R=O,1; R=0,3; R=0,5; R=0,7). No outro caso, os ensaios de fadiga foram realizados sob ΔK constante e utilizados os mesmos quatro níveis de razão de carregamento R para determinação da curva da/dN x ΔK constante. Os níveis de ΔK aplicados foram tomados na região de Paris da curva da/dN x ΔK. A análise fratográfica por microscopia eletrônica foi conduzida nas superfícies dos corpos de prova do ensaio de fadiga com ΔK constante. Isto foi feito para determinar os espaçamentos inter-estria (s) e a altura H das estrias para cada nível de ΔK aplicado. Observou-se que a taxa de crescimento da trinca (da/dN) e o espaçamento inter-estrias (s) sofrem influência direta com a variação do fator de intensidade de tensão (ΔK), entretanto, observou-se, também, que a relação de proporcionalidade de 1:1 entre eles somente é válida para níveis de da/dN variando entre 0,1 a 1 μ/ciclo. Os valores da morfologia da estrias (H/s) sofrem influência significativa com o aumento da razão de carga R, entretanto, ficou evidenciado que o fator de intensidade de tensão máxima Kmáx. não tem influência nesta relação. Evidenciou-se que a largura da estria corresponde à taxa de crescimento da trinca (da/dN), e que a relação entre a altura e o espaçamento da estria (H/s) possui uma correspondência direta com a razão de carga R, que tem influência significativa sobre a propagação de trinca por fadiga.
This work aims at to method to determine the load ratio R through of measure, on the fractured of surfaces the relation between the width striation spacing (s) and the height of the striation (H). It is of knowledge that the spacing (s), if correlates with the fatigue crack growth rates da/dN, whereas the curve da/dN x ΔK depends on the load ratio R. For this evaluation compact tension C(T) specimens had been extracted in the L- T orientation of a laminate plate of the aluminum alloy SAE-AMS 7475 T7351.These test had been carried out of two different forms. The first one, for attainment of relative data to region II of the curve da/dN x ΔK, being, in this in case that used four different load ratios (R=O,1; R=0,3; R=0,5; R=0,7). In the other in case that, the fatigue crack growth rates had been carried out under ΔK constant and used same the four levels of load ratios R for determination of the curve of constant da/dN x ΔK. The applied levels of ΔK had been taken in the region II of the curve da/dN x ΔK. The fractographic analysis for electronic microscopy was lead on the surfaces of the specimens tested in fatigue with constant ΔK. This was made to determine the striation spacing (s) and height (H) of the striations for each constant level of ΔK. It was observed that the fatigue crack growth rates (da/dN) and the striation spacing (s) suffers direct influence with the variation of ΔK. Also, was observed that the relation of proportionality of 1:1 between them is only valid for levels of da/dN in the range of 0,1 to 1,0 mm/cycle. The values of the relationship of the striation dimensions (H/s) suffer significant influence with the increasing of load ratios R. However, were evidenced that the value of Kmax. does not have influence in this relationship. It was found that the width of the striation corresponds to the value of (da/dN) and that the relation between the height and the striation of spacing (H/s) had a direct correspondence with the load ratios R that has signifficant effect on the fatigue crack growth rates.
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Dunn, Leigh. "Investigating accidents involving aircraft manufactured from polymer composite materials." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/8448.

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This thesis looks into the examination of polymer composite wreckage from the perspective of the aircraft accident investigator. It develops an understanding of the process of wreckage examination as well as identifying the potential for visual and macroscopic interpretation of polymer composite aircraft wreckage. The in-field examination of aircraft wreckage, and subsequent interpretations of material failures, can be a significant part of an aircraft accident investigation. As the use of composite materials in aircraft construction increases, the understanding of how macroscopic failure characteristics of composite materials may aid the field investigator is becoming of increasing importance. The first phase of this research project was to explore how investigation practitioners conduct wreckage examinations. Four accident investigation case studies were examined. The analysis of the case studies provided a framework of the wreckage examination process. Subsequently, a literature survey was conducted to establish the current level of knowledge on the visual and macroscopic interpretation of polymer composite failures. Relevant literature was identified and a compendium of visual and macroscopic characteristics was created. Two full-scale polymer composite wing structures were loaded statically, in an upward bending direction, until each wing structure fractured and separated. The wing structures were subsequently examined for the existence of failure characteristics. The examination revealed that whilst characteristics were present, the fragmentation of the structure destroyed valuable evidence. A hypothetical accident scenario utilising the fractured wing structures was developed, which UK government accident investigators subsequently investigated. This provided refinement to the investigative framework and suggested further guidance on the interpretation of polymer composite failures by accident investigators.
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Kulp, Andrew Brooks. "Analysis of Strength Variation in Glass Due to Ion Exchange." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/33204.

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The main goal of this project was to compare the changes in statistical variation and Weibull characteristics of the strength of glass rods as modified by heat treatment with and without an ion exchange bath. Several sample groups of 30 sodium borosilicate glass rod specimens were heat treated at various temperatures in air and in a potassium nitrate salt bath to induce an ion exchange process. All samples were then tested to failure in 4-point bending to assess the resulting Modulus of Rupture (MOR). Statistical analysis techniques and Weibull analysis were used to study the variations which occur within and between strength distributions of each sample group. A smaller sampling of test groups was subjected to fractographic analysis to study the effect of ion exchange on fracture features. The data shows that the ion exchange process caused a statistically significant increase in the strength of the glass rods. Samples which were heat treated do not show any significant changes in average strength. The fractographic analysis suggests that no changes in fracture morphology occurred as a result of ion exchange process, and that the critical flaw size population was not significantly different.
Master of Science
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Григорович, Кравець Василь, Романишин Олександр Богданович, Vasyl Kravets, and Oleksandr Romanyshyn. "Розроблення автоматизованих методів механічних випробувань та електронно-мікроскопічних досліджень стальних зразків." Master's thesis, Тернопільський національний технічний університет ім. І. Пулюя, Факультет прикладних інформаційних технологій та електроінженерії, Кафедра автоматизації технологічних процесів і виробництв, 2019. http://elartu.tntu.edu.ua/handle/lib/29643.

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Робота виконана на кафедрі автоматизації технологічних процесів і виробництв факультету прикладних інформаційних технологій та електроінженерії Тернопільського національного технічного університету імені Івана Пулюя Міністерства освіти і науки України. Захист відбудеться «24» грудня 2019р.о 8.00год. на засіданні екзаменаційної комісії №43 у Тернопільському національному технічному університеті імені Івана Пулюя
У магістерській роботі розв’язано задачу розроблення автоматизованого методу автоматизації механічних випробувань із застосуванням цифрової та аналогової техніки. Під час випробувань вимірювали велику кількість електричних та неелектричних величин за допомогою закладених або вбудованих в машину на час випробувань давачів (measuring element, sensor). Давачі можуть складатися з одного елементу (тензорезистори) або багатьох складних блоків багатофункціонального перетворення. Одночасно з записом показів давачів у пам’яті ЕОМ їх, звичайно, виводять і на прилади для здійснення візуального контролю за перебігом випробувань
The master's thesis addresses the problem of developing an automated method of automation of mechanical tests using digital and analog techniques. During the tests, a large number of electrical and non-electrical quantities were measured using the measuring or sensor elements embedded or integrated into the machine during the testing. Sensors can consist of a single element (strain gauges) or many complex blocks of multifunctional conversion. At the same time as recording the sensors in the memory of the computer, they are usually output to devices for visual monitoring of the test.
1. Аналітична частина 1.1. Аналіз методів механічних випробувань та мікроскопічного аналізу 1.2. Актуальність виконання проекту 1.3. Методи стереометрії як спосіб відтворення «історії руйнування» 1.4. Розвиток механічних та оптико-цифрових методів досліджень 2. Технологічна частина 2.1. Характеристика об’єкту або предмету дослідження 2.2. Напружено-деформований стан ролика МБЛЗ 2.3. Програма і методика теоретичних та експериментальних досліджень 2.4. Підбір механічних пристосувань 2.5. Аналіз і узагальнення отриманої інформації 3. Конструкторська частина 3.1. Автоматизована система керування сервогідравлічною машиною CTM-100 на базі платформи MTL32 3.2. Автоматизація проведення досліджень теплостійких сталей на в’язкість руйнування. Програмний комплекс TestBuilder 3.2.1. Генератор циклічних навантажень 3.2.2. Багатоциклові втомні навантаження 3.2.3. Модуль статичного навантаження 3.2.4. Програмування складних послідовностей навантаження 3.2.5 Запис та експорт даних досліджень 3.2.6. Встановлення і використання обмежень 4. Науково-дослідна частина 4.1. Вимірювання глибини зони витягування компактного зразка 4.2. Вимірювання фрактографічних рельєфних утворень 5. Спеціальна частина 5.1. Засоби тензо- і динамометрії 5.2. Програма для запису діаграм деформування 6. Техніко-економічне обгрунтування 6.1. Вдосконалення організації наукових досліджень 6.2. Планування та розрахунок передвиробничих затрат та капіталовкладень на проведення НДР 7. Охорона праці та безпека в надзвичайних ситуаціях 8. Екологія Висновки Перелік посилань
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Books on the topic "Fractographic analysis"

1

Shimokawa, Toshiyuki. Analysis of fatigue fractographic data of a rod end housing using Monte Carlo simulation. Chofu, Tokyo: National Aerospace Laboratory, 1995.

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Kolkman, H. J. Microstructural and fractographic analysis of fatigue crack propagation in 2024-T351 and 2324-T39. Amsterdam: National Aerospace Laboratory, 1985.

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Quinn, G. D. On the fractographic analysis of machining cracks in ground ceramics: A case study on silicon nitride. Gaithersburg, MD: U.S. Dept. of Commerce, Technology Administration, National Institute of Standards and Technology, 2003.

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González-Velázquez, Jorge Luis. Fractography and Failure Analysis. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-76651-5.

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Freiman, S. W. The fracture of brittle materials: Testing and analysis. Hoboken, N.J: John Wiley & Sons, 2012.

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McSwain, Richard Horace. Digital fractographic imaging analysis. 1985.

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González-Velázquez, Jorge Luis. Fractography and Failure Analysis. Springer, 2018.

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González-Velázquez, Jorge Luis. Fractography and Failure Analysis. Springer, 2018.

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Edwards, Dale, Michael Hayes, and Andy Shah. Fractography in Failure Analysis of Polymers. Elsevier Science & Technology Books, 2015.

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Fractography in Failure Analysis of Polymers. Elsevier Science & Technology Books, 2015.

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Book chapters on the topic "Fractographic analysis"

1

Quinn, George D., and Ceramics Division. "Fractographic Analysis of Miniature Theta Specimens." In Corrosion, Wear, Fatigue, and Reliability of Ceramics, 189–99. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2009. http://dx.doi.org/10.1002/9780470456347.ch19.

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Quinn, G. D. "Fractographic Analysis of Broken Ceramic Dental Restorations." In Advances in Bioceramics and Porous Ceramics VII, 39–51. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119040392.ch5.

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Quinn, George D., Kathleen Hoffman, S. Scherrer, U. Lohbauer, G. Amberger, M. Karl, and J. R. Kelly. "Fractographic Analysis of Broken Ceramic Dental Restorations." In Ceramic Transactions Series, 161–74. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118433010.ch12.

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Kašiarová, Monika, Tanquy Rouxel, J. C. Sanglebœuf, and V. Le Houérou. "Fractographic Analysis of Surface Flaws in Glass." In Fractography of Advanced Ceramics II, 300–303. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-973-3.300.

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Brassart, Laury-Hann, Samy Blusseau, François Willot, Francesco Delloro, Gilles Rolland, Jacques Besson, Anne-Françoise Gourgues-Lorenzon, and Michel Jeandin. "Quantitative Characterization of Ductility for Fractographic Analysis." In Mathematics in Industry, 349–55. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11818-0_46.

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Mecholsky, J. J. "Quantitative Fractographic Analysis of Fracture Origins in Glass." In Fractography of Glass, 37–73. Boston, MA: Springer US, 1994. http://dx.doi.org/10.1007/978-1-4899-1325-8_2.

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Tanaka, Sumio, Yukio Hirose, and Keisuke Tanaka. "X-Ray Fractographic Study On Alumina and Zirconia Ceramics." In Advances in X-Ray Analysis, 719–27. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3744-1_76.

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Kumar, A., P. J. Saikia, M. Kumar, S. Bag, N. Muthu, and R. G. Narayanan. "Fractographic Analysis of Friction Stir Welded Aluminium Alloy." In Advances in Processing of Lightweight Metal Alloys and Composites, 167–79. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-7146-4_9.

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Matsuoka, Hideaki, Yukio Hirose, Shigenobu Takahashi, Zenjiro Yajima, and Yoichi Kishi. "X-Ray Fractographic Study on Fracture Surface of New Light Metal." In Advances in X-Ray Analysis, 435–42. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1797-9_50.

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Hirose, Yukio, Zenjiro Yajima, and Keisuke Tanaka. "X-Ray Fractographic Approach to Fracture Toughness of AISI 4340 Steel." In Advances in X-Ray Analysis, 289–96. Boston, MA: Springer US, 1985. http://dx.doi.org/10.1007/978-1-4613-2471-3_42.

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Conference papers on the topic "Fractographic analysis"

1

Makarenko, Konstantin, Alexander Nikitin, and Andrey Parenko. "Fractographic analysis of fractures of graphitized cast iron using optical microscopy." In International Conference "Computing for Physics and Technology - CPT2020". Bryansk State Technical University, 2020. http://dx.doi.org/10.30987/conferencearticle_5fce27703aebb2.03360772.

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Fractography - methods for studying material fractures, the science of the structure of fracture surfaces. Fractography is widely used to determine the causes of destruction of materials and structures. In materials sciences, fractography is used to study crack propagation, microstructure studies, and quality control. When investigating the failure of structures, determining the type of crack (material fatigue, hydrogen embrittlement, stress corrosion cracking, exceeding the permissible load, etc.) makes it possible to determine the cause of the failure. Fractographic studies include the study of a fracture with the naked eye, using an optical and electron microscope. Other methods are also often used, such as measuring hardness or studying the distribution of chemical elements using X-ray spectral microanalysis. Fractographic (or fracture) analysis is the first and obligatory stage of research that must be performed by an expert of the metallurgical examination laboratory when determining the causes of material destruction. Visual examination of the fracture (fracture) surface makes it possible to establish the location of the beginning of fracture, the nature of its further course, to make a judgment about the degree of plasticity of the material and about possible structural defects that led to the initiation and development of cracks. The use of fractographic analysis methods for reconstructing the fracture surface of graphitized cast iron is proposed. The influence of various inclusions in the structure of cast iron is considered. A study of the fracture surface of graphitized cast irons was carried out, and the causes affecting the fracture process were identified.
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Guo, Shenghan, Paul Paradise, Nicole Van Handel, and Dhruv Bhate. "Image-Based Fractographic Pattern Recognition With Cluster Analysis." In ASME 2022 17th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/msec2022-82773.

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Abstract Scanning Electron Microscopy (SEM) is traditionally leveraged to image fracture surfaces and generate information for analysis. Conventionally, experts identify patterns of interest in SEM images and link them to fracture phenomena based on knowledge and experience. Such practice has substantial limitations. It relies on expert opinions for decision-making, which poses barriers for practitioners without relevant background; manual inspection must be done for individual SEM images, thus time-consuming and inapt for industrial automation. There is a genuine demand for a fast, automatic method for fractographic pattern recognition. Targeting the problem, this study proposes a two-stage data-driven approach based on clustering. In offline analysis (Stage 1), a clustering algorithm identifies the generic fractographic patterns on part. Each pattern corresponds to a cluster. Expert evaluation of the part’s crack status is leveraged to map individual patterns (clusters) to a crack type. In in-situ monitoring (Stage 2), SEM images of new parts are matched to the clusters from stage 1, which reveals the generic patterns on the part and indicates the potential crack status. The proposed approach enables automatic fractographic analysis without experts. It is demonstrated to be effective on real SEM images of additively manufactured Inconel-718 specimens subjected to high cycle fatigue.
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Kraus, Joerg, Carlo Bruschi, Enrico Chierici, Herbert Buerger, and Ivailo Gugov. "Bending strength and fractographic analysis of zinc tellurite glass modified optical fibers." In High-Power Lasers and Applications, edited by M. John Matthewson and Charles R. Kurkjian. SPIE, 2002. http://dx.doi.org/10.1117/12.481341.

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Nohava, J., R. Enzl, F. Zahalka, and C. Foucher. "Fractographic Approach to Wear Mechanisms of Selected Thermally Sprayed Coatings." In ITSC2005, edited by E. Lugscheider. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2005. http://dx.doi.org/10.31399/asm.cp.itsc2005p0875.

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Abstract Coatings deposited by thermal spraying are widely used for applications where enhanced resistance to wear is a crucial factor. In this work we focused on HVOF and plasma sprayed WC-Co, NiCrSiB, Cr3C2-NiCr, AISI 316L and Cr2O3 coatings. The materials were examined by wet slurry abrasion tests, microhardness and roughness measurements. Systematic fractographic analysis in SEM was devoted to determine the main failure mechanisms of selected coatings. The WC-Co coating exhibited the lowest wear rate while 316L coating exhibited the highest wear rate. The plasma sprayed Cr2O3 coating exhibited wear rate higher than HVOF sprayed cermet coatings but lower than metal coating. In most cases it was found that the higher microhardness, the higher is the wear resistance of the coating. The most favorable microstructure was found to be a mixture of hard particles dispersed in tough metal matrix. Matrix-like structure and internal splat microstructure were the main factors controlling the wear resistance of the investigated HVOF and WSP coatings.
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Silveira, Núbia Nale, Rita Sales, Camila Brito, Geraldo Cândido, and Mauricio Donadon. "Fractographic analysis of co-bonded carbon fiber reinforced composites joints subjected to mode I delamination." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-0778.

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Salem, Jonathan A., Jane M. Manderscheid, Marc R. Freedman, and John P. Gyekenyesi. "Reliability Analysis of a Structural Ceramic Combustion Chamber." In ASME 1991 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/91-gt-155.

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The Weibull modulus, fracture toughness, and thermal properties of a silicon nitride material used to make a gas turbine combustor were experimentally measured. The location and nature of failure origins resulting from bend tests were determined with fractographic analysis. The measured Weibull parameters were used along with thermal and stress analysis to determine failure probabilities of the combustor with the CARES design code. The effects of data censoring, FEM mesh refinement, and fracture criterion were considered in the analysis.
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Xu, S., R. Bouchard, G. Shen, and W. R. Tyson. "Plastic Collapse Load Determination Using Laboratory-Scale SE(T) Samples Under Fixed-Grip Loading." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10022.

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A high-toughness steel was tested in tension under fixed-grip loading using Charpy-size SE(T) samples. The objective was to determine plastic collapse loads using laboratory-scale samples under conditions similar to those experienced by girth weld defects in pipelines. The selection of the high-toughness steel was to inhibit significant crack extension from notches at maximum loads and this was largely achieved based on fractographic observations and ductile tearing analysis. This paper includes detailed experimental measurements of maximum loads, fractographic observations, and comparison of the experimental values with FEA results in 2-D plane stress and plane strain and in 3-D. The plastic collapse limit in BS 7910 was found to be conservative for plane-sided samples by 17 to 30% (average 23%) for the steel and geometries used in this work.
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Nicak, Tomas, and Alexey Rempel. "Post-Test Analysis of a Large Scale Mock-Up Test Performed in the European Project ATLAS+." In ASME 2021 Pressure Vessels & Piping Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/pvp2021-60495.

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Abstract The safety and reliability of all systems has to be maintained throughout the lifetime of a nuclear power plant (NPP). This requires a systematic ageing management procedure for justifying their safe long term operation. One fundamental part in this process is to demonstrate the integrity of the nuclear power plant components. The European project ATLAS+ aims to develop and validate advanced methods of structural integrity assessment applicable in the ageing and lifetime management of primary circuit components. To support development and validation of those methods a large scale test programme was developed with the aim to investigate fracture behavior of relevant piping material at the component level. Three of the planned large scale experiments focus on the fracture behavior of flawed ferritic pipe segments made of material WB 36 (15 NiCuMoNb 5); this material is representative of secondary feedwater lines installed in German NPPs. In order to improve understanding of test results post-test simulations and fractographic examination of all large scale tests are planned, some of them have been already performed. In this paper the post-test simulation of the mock-up FP2 (ferritic pipe with outer semi-elliptical circumferential crack) is presented and discussed. This mock-up was selected because it experienced an unexpected brittle fracture during the test, which occurred after limited ductile crack propagation. To investigate both the ductile and the brittle crack propagation phases of the test detailed ductile tearing analysis and brittle fracture assessment have been performed. In addition, relevant results of fractographic examination of the mock-up FP2 are presented and discussed.
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9

Chae, Seung-Hyun, Jie-Hua Zhao, Darvin R. Edwards, and Paul S. Ho. "Effect of Dicing Technique on the Fracture Strength of Si Dies With Emphasis on Multi-Modal Failure Distribution." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89311.

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The ball-on-ring (BOR) and 3-point bending (3PB) tests were used in this study to characterize the effect of dicing process on the fracture strength of Si dies. Dies prepared by a blade dicing process and a laser dicing process were studied. The edge-initiated fracture was distinguished from the surface-initiated fracture by the fractographic analysis. The fracture strength distributions related to surface flaws in the 3PB test as well as the BOR test were consistent regardless of dicing process. For the edge defect-induced failure mode, on the other hand, blade-sawn dies showed wider spread distribution than laser-sawn dies. It was due to the scattered nature in size and location of edge flaws induced by blade dicing. The laser-sawn dies showed a tighter distribution of the die strength although the average die strength was slightly lower than that of the blade-sawn dies. This work successfully demonstrated that the die failure caused by the edge defects can be deconvoluted from the 3PB test data by using the fractographic observation.
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Lu, Shuanlu, Pinsheng Zhang, Changyi Qin, Xinhu Wang, Faqian Luo, and Jie Zhou. "The Analysis on Causes of Rupture of a HP-Nb High Temperature Alloy Radiant Furnace Tube." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93008.

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An explosion accident occurred in a HP-Nb high temperature alloy radiant furnace tube. Twenty one lengths of furnace tubes were broken and cracked during this explosion. This paper investigates the explosion accident. The broken furnace tubes were investigated by fractographic observation and metallographic inspection and with mechanical performance test and analysis to determine the cause of the explosion. The results of the analysis indicated that the failure of the furnace tube was caused by high temperature creep. In order to determine the temperature of the furnace tube failure, some heat simulation tests from 900°C to 1200°C were carried out, the results of which confirmed that the failure of the furnace tube was primarily due to creep fracture because of the high temperature.
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Reports on the topic "Fractographic analysis"

1

Shockey, Donald A., Takao Kobayashi, Naoki Saito, Jean-Marie Aubry, and Alberto Grunbaum. Fractographic Analysis of High-Cycle Fatigue in Aircraft Engines. Fort Belvoir, VA: Defense Technical Information Center, January 2000. http://dx.doi.org/10.21236/ada386670.

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Quinn, George D., George D. Quinn, Lewis K. Ives, and Said Jahanmir. On the fractographic analysis of machining cracks in ground ceramics. Gaithersburg, MD: National Institute of Standards and Technology, 2003. http://dx.doi.org/10.6028/nist.sp.996.

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Quinn, George D., Jeffrey J. Swab, and Michael J. Slavin. A Proposed Standard Practice for Fractographic Analysis of Monolithic Advanced Ceramics. Fort Belvoir, VA: Defense Technical Information Center, November 1990. http://dx.doi.org/10.21236/ada231989.

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