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Relevant bibliographies by topics / Microstructural analysis

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Academic literature on the topic 'Microstructural analysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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Journal articles on the topic "Microstructural analysis"

1

Bhakar, Ashok, Pooja Gupta, P. N. Rao, M. K. Swami, Pragya Tiwari, Tapas Ganguli, and S. K. Rai. "Line profile analysis of synchrotron X-ray diffraction data of iron powder with bimodal microstructural profile parameters." Journal of Applied Crystallography 54, no. 2 (March 18, 2021): 498–512. http://dx.doi.org/10.1107/s1600576721000601.

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Room-temperature synchrotron X-ray diffraction and subsequent detailed line profile analysis of Fe powder were performed for microstructural characterization. The peak shapes of the diffraction pattern of Fe were found to be super-Lorentzian in nature and the peak widths were anisotropically broadened. These peak profile features of the diffraction pattern are related to the microstructural parameters of the material. In order to elucidate these features of the diffraction pattern, detailed line (peak) profile analyses were performed using the Rietveld method, modified Williamson–Hall plots and whole powder pattern modelling (WPPM), and related microstructural parameters were determined. Profile fitting using the Rietveld and WPPM methods with a single microstructural (unimodal) model shows systematic deviation from the experimentally observed diffraction pattern. On the basis of Rietveld analysis and microstructural modelling it is revealed that the microstructure of Fe consists of two components (bimodal profile). The microstructural parameters of crystallite/domain size distribution, dislocation density, nature of dislocations and phase fraction were evaluated for both components. The results obtained using different methods are compared, and it is shown that diffraction peak profile analysis is capable of modelling such inhomogeneous bimodal microstructures.

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Ott, J., A. Burghardt, D. Britz, S. Majauskaite, and F. Mücklich. "Qualitative and Quantitative Microstructural Analysis of Copper for Sintering Process Optimization in Additive Manufacturing Applications." Practical Metallography 58, no. 1 (January 1, 2021): 32–47. http://dx.doi.org/10.1515/pm-2020-0002.

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Abstract This work will present possibilities for the characterization of copper powder green bodies and sintered copper microstructures during pressureless sintering. The introduction of new parameters to microstructural characterization based on qualitative and quantitative microstructural analysis will facilitate the systematic optimization of the sintering process. As a result of the specific evaluation of the microstructure evolution, conventional isothermal sintering could be successfully replaced by multi-step temperature profiles, thus achieving sintering densities of more than 99 % by simultaneously reducing process time. This systematic optimization of the sintering process of Cu through specific microstructural analysis may now be applied to sinter-based manufacturing technologies such as Binder Jetting and Metal Powder Injection Moulding, enabling the manufacture of complex and highly conductive Cu parts for applications in electronics.

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Höche, Nils, Eric O. Walliser, Niels J. de Winter, Rob Witbaard, and Bernd R. Schöne. "Temperature-induced microstructural changes in shells of laboratory-grown Arctica islandica (Bivalvia)." PLOS ONE 16, no. 2 (February 26, 2021): e0247968. http://dx.doi.org/10.1371/journal.pone.0247968.

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Bivalve shells are increasingly used as archives for high-resolution paleoclimate analyses. However, there is still an urgent need for quantitative temperature proxies that work without knowledge of the water chemistry–as is required for δ18O-based paleothermometry–and can better withstand diagenetic overprint. Recently, microstructural properties have been identified as a potential candidate fulfilling these requirements. So far, only few different microstructure categories (nacreous, prismatic and crossed-lamellar) of some short-lived species have been studied in detail, and in all such studies, the size and/or shape of individual biomineral units was found to increase with water temperature. Here, we explore whether the same applies to properties of the crossed-acicular microstructure in the hinge plate of Arctica islandica, the microstructurally most uniform shell portion in this species. In order to focus solely on the effect of temperature on microstructural properties, this study uses bivalves that grew their shells under controlled temperature conditions (1, 3, 6, 9, 12 and 15°C) in the laboratory. With increasing temperature, the size of the largest individual biomineral units and the relative proportion of shell occupied by the crystalline phase increased. The size of the largest pores, a specific microstructural feature of A. islandica, whose potential role in biomineralization is discussed here, increased exponentially with culturing temperature. This study employs scanning electron microscopy in combination with automated image processing software, including an innovative machine learning–based image segmentation method. The new method greatly facilitates the recognition of microstructural entities and enables a faster and more reliable microstructural analysis than previously used techniques. Results of this study establish the new microstructural temperature proxy in the crossed-acicular microstructures of A. islandica and point to an overarching control mechanism of temperature on the micrometer-scale architecture of bivalve shells across species boundaries.

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Nolan, T. P., R. Sinclair, T. Yamashita, and R. Ranjan. "Correlation of micro-structural, micro-chemical and micro-magnetic properties of longitudinal recording media using CM20FEG Lorentz TEM." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 892–93. http://dx.doi.org/10.1017/s042482010017219x.

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Cobalt alloy on chromium thin film magnetic media are used in industry computer hard disk drives because of their large values of coercivity (Hc), remanent magnetization (Mr), squareness (S*), and relatively low noise. The magnetic performance depends strongly on processing conditions and the resulting nanometer scale microstructure.A complete structure-processing-properties analysis requires effective measurement of magnetic and microstructural properties. To date, most structure-properties analyses have involved correlation of bulk magnetic (hysteresis loop) properties and magnetic recording measurements with physical microstructures observed by high-resolution SEM and TEM.The nanoscale microstructural features that dramatically affect magnetic properties are difficult to observe but careful TEM analysis has been used to observe subtle, important differences in the atomic scale physical microstructure. Even these impressive capabilities are becoming insufficient for continued development of improved magnetic recording media. Microstructural design is moving into a regime where appropriate control of magnetic properties requires control of elemental composition and second phase formation as well as crystallography and morphology, at near-atomic levels.

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Dahmen, U., N. Thangaraj, and R. Kilaas. "Quantitative TEM analysis of microstructural anisotropy." Proceedings, annual meeting, Electron Microscopy Society of America 52 (1994): 682–83. http://dx.doi.org/10.1017/s0424820100171146.

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Preferred orientation of grain boundaries or interfaces in solids is an important indicator of anisotropy in boundary energy or kinetics. The present study is part of an ongoing investigation of faceting in thin films with the mazed bicrystal microstructure which possesses several unique features that are difficult to measure with standard parameters such as grain size distribution. One of the important characteristics of this microstructure is the degree and type of anisotropy. Figure 1 shows a micrograph with a typical mazed bicrystal microstructure. Only two grain orientations with about equal volume fraction are seen in black and white contrast, respectively. It is apparent that unlike a normal polycrystalline thin film, individual grains in this microstructure have unusual convoluted shapes with both concave and convex regions.The standard stereological method to measure microstructural anisotropy is the rose plot generated from a count of intersections with a reference grid overlaid on the micrograph at different angles.

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Beh, Chong You, Ee Meng Cheng, Xiao Jian Tan, Nashrul Fazli Mohd Nasir, Mohd Shukry Abdul Majid, Mohd Ridzuan Mohd Jamir, Shing Fhan Khor, Kim Yee Lee, and Che Wan Sharifah Robiah Mohamad. "Complex Impedance and Modulus Analysis on Porous and Non-Porous Scaffold Composites Due to Effect of Hydroxyapatite/Starch Proportion." Polymers 15, no. 2 (January 8, 2023): 320. http://dx.doi.org/10.3390/polym15020320.

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This study aims to investigate the electric responses (complex modulus and complex impedance analysis) of hydroxyapatite/starch bone scaffold as a function of hydroxyapatite/starch proportion and the microstructural features. Hence, the non-porous and porous hydroxyapatite/starch composites were fabricated with various hydroxyapatite/starch proportions (70/30, 60/40, 50/50, 40/60, 30/70, 20/80, and 10/90 wt/wt%). Microstructural analysis of the porous hydroxyapatite/starch composites was carried out by using scanning electron microscopy. It shows that the formation of hierarchical porous microstructures with high porosity is more significant at a high starch proportion. The complex modulus and complex impedance analysis were conducted to investigate the electrical conduction mechanism of the hydroxyapatite/starch composites via dielectric spectroscopy within a frequency range from 5 MHz to 12 GHz. The electrical responses of the hydroxyapatite/starch composites are highly dependent on the frequency, material proportion, and microstructures. High starch proportion and highly porous hierarchical microstructures enhance the electrical responses of the hydroxyapatite/starch composite. The material proportion and microstructure features of the hydroxyapatite/starch composites can be indirectly reflected by the simulated electrical parameters of the equivalent electrical circuit models.

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Charles Murgau, Corinne, Andreas Lundbäck, Pia Åkerfeldt, and Robert Pederson. "Temperature and Microstructure Evolution in Gas Tungsten Arc Welding Wire Feed Additive Manufacturing of Ti-6Al-4V." Materials 12, no. 21 (October 28, 2019): 3534. http://dx.doi.org/10.3390/ma12213534.

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In the present study, the gas tungsten arc welding wire feed additive manufacturing process is simulated and its final microstructure predicted by microstructural modelling, which is validated by microstructural characterization. The Finite Element Method is used to solve the temperature field and microstructural evolution during a gas tungsten arc welding wire feed additive manufacturing process. The microstructure of titanium alloy Ti-6Al-4V is computed based on the temperature evolution in a density-based approach and coupled to a model that predicts the thickness of the α lath morphology. The work presented herein includes the first coupling of the process simulation and microstructural modelling, which have been studied separately in previous work by the authors. In addition, the results from simulations are presented and validated with qualitative and quantitative microstructural analyses. The coupling of the process simulation and microstructural modeling indicate promising results, since the microstructural analysis shows good agreement with the predicted alpha lath size.

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Pinheiro, Bruno C. A., and J. N. F. Holanda. "Microstructural Analysis of Petroleum Waste Containing Ceramic Tile." Materials Science Forum 591-593 (August 2008): 845–48. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.845.

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In this work is done a study on the sintered microstructure of ceramic tile paste incorporated with petroleum waste. The raw materials used were kaolin, sodic feldspar, quartz and petroleum waste. The ceramic tiles containing up to 5 wt% petroleum waste were prepared by uniaxial pressing and sintered at 1200°C. The microstructural evolution was examined by SEM. In addition, water absorption, linear shrinkage, and sintered density were determined. The results showed that the microstructure of the ceramic tiles is influenced by the added petroleum waste.

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Agnani, M., O. L. DeNonno, K. O. Findley, and S. W. Thompson. "Quantitative Analysis of Microstructural Refinement in Simulated Carburized Microstructures." Journal of Materials Engineering and Performance 29, no. 6 (March 9, 2020): 3551–59. http://dx.doi.org/10.1007/s11665-020-04714-z.

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Shin, Jun Ho, Nam Yong Jee, Leslie J. Struble, and R. James Kirkpatrick. "Modeling Alkali-Silica Reaction Using Image Analysis and Finite Element Analysis." Advanced Materials Research 250-253 (May 2011): 1050–53. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1050.

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The objective of this study is to develop a numerical model based on microstructural images of concrete and fundamental material properties of each constituent of concrete subjected to alkali-silica reaction (ASR). A microstructure-based finite element approach is employed directly to analyze the mechanical response of concrete to ASR. The modeling work involves acquiring and processing of microstructural images of specimens suffering from ASR using scanning electron microscopy, and implementing finite element program to analyze the microstructural images. The formulation of this model is based on pressure caused by the ASR product and on properties such as Young’s modulus and Poisson’s ratio. The finite element analysis program used to simulate structural behavior of structures attacked by ASR is object-oriented finite element developed at National Institute of Standards and Technology. The numerical results from this model are compared with experimental data, which have been measured using ASTM standard test C1260. The results show that the development and widening of cracks by formation and swelling of ASR gel cause the majority of expansion of mortar specimens rather than elastic elongation due to gel swelling.

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Dissertations / Theses on the topic "Microstructural analysis"

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Kok, Kuan Ying. "Microstructural analysis of giant magnetoresistive multilayers." Thesis, University of Cambridge, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627229.

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Bolser, Diana. "Microstructural Analysis of Calcium-Aluminum-Rich Inclusions." Thesis, The University of Arizona, 2014. http://hdl.handle.net/10150/339044.

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Refractory materials are among the building blocks of our solar system and their chemistry and structure hold clues to understanding our origins. In this thesis I present a multifaceted approach toward understanding the histories of refractory materials within calcium-aluminum rich inclusions (CAIs) in primitive meteorites. I apply high-spatial resolution techniques including electron backscatter diffraction (EBSD), transmission electron microscopy (TEM), and scanning transmission X-ray microscopy (STXM) enabled by focused ion beam scanning electron microscopy (FIB-SEM) to investigate CAI components and the Wark Lovering Rims that surround them to obtain information on microstructure and crystal chemistry in meteorites with varied pre-terrestrial histories. These inclusions possess three-dimensional grain islands, which exhibit crystallographic preferred orientations. The islands formed by high-temperature condensation in the solar nebula in a process driven by surface energy minimization, as shown by density functional theory (DFT) calculations. I also report preliminary results from laboratory experiments designed to synthesize perovskite under controlled temperature and oxygen fugacity (fO₂) conditions. The goal of this project was to develop a calibrated barometer based on changes in the oxidation state of Ti and apply the barometer to measurements of meteoritic samples in order to infer the thermodynamic conditions under which meteoritic perovskite formed in CAIs.

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Lustig, Steven K. "Microstructural analysis of finite deformation in FCC polycrystals." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/15916.

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Lemmon, Timothy John. "Microstructural analysis of a liquid-crystalline aromatic copolyester." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317931.

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Minick, Jill Suzanne. "Microstructural analysis of polyethylenes and their blends and copolymers." Case Western Reserve University School of Graduate Studies / OhioLINK, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=case1058204252.

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Johnson, Lindsay W. "The mechanical and microstructural analysis of the human cornea." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/17065.

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Corry, Denis Albert Kenneth. "Mechanistic and microstructural analysis of ring-opening metathesis polymerisation." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266699.

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Abdelaziz, Gamal E. "Microstructural analysis of surface and interface zones in concrete." Thesis, Aston University, 1997. http://publications.aston.ac.uk/13268/.

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Several of OPC paste and concrete specimens, with different mix proportions, were cast against CPF and impermeable formwork (IF) and the profiles of pore structure, microhardness and scratch hardness of the cover zone were established. The chloride ingress and the depth of carbonation of the surface zone of concrete cast against CPF and IF were investigated. The main mechanisms controlling the ECR processes and the factors affecting such treatment were critically reviewed. Subsequently, as a means of restoring passivation of steel embedded in carbonated concrete, such HCP specimens were subjected to ECR. The influence of ECR on the chemistry of the pore solution and the microstructure of the surface and the steel/cement past interface zones were also studied. The main findings of this investigation were as follows: (a) The thickness of the microstructure gradient of cover concrete is significantly decreased with increasing period of water curing but is relatively unaffected by curing temperature, w/e ratio and the use of cement replacement materials. (b) The scratch hardness technique was shown to be potentially useful for characterising the microstructure and microhardness gradients of the surface zone. (c) A relationship between the microstructure gradient and mass transport properties of the surface zone was established. (d) The use of CPF resulted in a significant reduction in porosity of both the cement paste matrix and the aggregate/cement paste transition zone, and a marked improvement in the resistance of the surface zone to carbonation and the ingress of chloride ions. (e) The ECR treatment resulted in a marked densification of the pore structure and in changes to the pore solution chemistry and the cement phases of near-surface and steel/cement paste transition zones. This effect was more pronounced with current density, period of treatment and particularly with the use of sodium phosphate as an electrolyte.

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Inglis, Jeremy David. "P-T-t-d constraints on the early evolution of Cadomia, La Hague region, NW France." Thesis, Oxford Brookes University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251669.

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Badiei, Nafisheh. "Microstructural and rheological studies of fibrin-thrombin gels." Thesis, Swansea University, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.678597.

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Books on the topic "Microstructural analysis"

1

Jouffrey, B., ed. Microstructural Investigation and Analysis. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2000. http://dx.doi.org/10.1002/3527606165.

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(1999), EUROMAT 99. Microstructural investigation and analysis: EUROMAT 99. Edited by Svejcar J, Jouffrey Bernard, Deutsche Gesellschaft für Materialkunde, and Federation of European Materials Societies. [Germany]: Deutsche Gesellschaft für Materialkunde, 2000.

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Aguilera, José Miguel. Microstructural principles of food processing & engineering. London: Elsevier Applied Science, 1990.

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Gordeeva, N. D. Microstructural analysis of the execution complex motor actions: Methods and results. New Delhi: Oxonian Press, 1989.

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Gordeeva, N. D. Microstructural analysis of the execution of complex motor actions: Methods and results. New Delhi: Published for the National Library of Medicine by Amerind Pub. Co. ; Springfield, Va. : Available from the U.S. Dept. of Commerce, National Technical Information Service, 1989.

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6

Bayliss, Roger W. The sintering, microstructural analysis and mechanical properties of two beta MgSiAlON ceramics. [s.l.]: typescript, 1986.

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Boswell, Frank W. Advances in the Crystallographic and Microstructural Analysis of Charge Density Wave Modulated Crystals. Dordrecht: Springer Netherlands, 1999.

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Boswell, Frank W., and J. Craig Bennett, eds. Advances in the Crystallographic and Microstructural Analysis of Charge Density Wave Modulated Crystals. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4603-6.

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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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Xianghua, Liu, and Zhao Xianping, eds. Kong zha kong leng gang de xian wei zu zhi xing mao ji fen xi: Microstructural morphology and analysis of TMCP steels. Beijing: Ke xue chu ban she, 2010.

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Book chapters on the topic "Microstructural analysis"

1

Sachithanadam, Mahesh, and Sunil Chandrakant Joshi. "Microstructural Analysis." In Silica Aerogel Composites, 37–50. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0440-7_4.

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Sastry, Gunturi Venkata Sitarama. "Fourier Analysis and Fourier Transformation." In Microstructural Characterisation Techniques, 15–24. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3509-1_3.

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Blum, Tyler B., James R. Darling, Thomas F. Kelly, David J. Larson, Desmond E. Moser, Alberto Perez-Huerta, Ty J. Prosa, et al. "Best Practices for Reporting Atom Probe Analysis of Geological Materials." In Microstructural Geochronology, 369–73. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119227250.ch18.

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Hetherington, Callum J., Ethan L. Backus, Christopher R. M. McFarlane, Christopher M. Fisher, and D. Graham Pearson. "Origins of Textural, Compositional, and Isotopic Complexity in Monazite and Its Petrochronological Analysis." In Microstructural Geochronology, 63–90. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2017. http://dx.doi.org/10.1002/9781119227250.ch3.

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Körner, C., and R. F. Singer. "Processing of Metal Foams - Challenges and Opportunities." In Microstructural Investigation and Analysis, 1–13. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch1.

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Kretz, Richard, and Helmut Kaufmann. "Fabrication of Squeeze Castings with Permanent Aluminium Foam Cores." In Microstructural Investigation and Analysis, 63–67. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch10.

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Maire, E., F. Wattebled, J. Y. Buffière, and G. Peix. "Deformation of a Metallic Foam Studied by X-Ray Computed Tomography and Finite Element Calculations." In Microstructural Investigation and Analysis, 68–73. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch11.

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Kriszt, B., B. Foroughi, A. Kottar, and H. P. Degischer. "Mechanical Behavior of Aluminum Foam Under Uniaxial Compression." In Microstructural Investigation and Analysis, 73–82. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch12.

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Böllinghaus, Thorsten, Heiko von Hagen, and Wolfgang Bleck. "Dynamic Behavior of Melt-Foamed Aluminum under Compressive and Tensile Loads." In Microstructural Investigation and Analysis, 83–89. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch13.

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Motz, Ch, R. Pippan, and U. Galovsky. "Fracture of Metal Foams." In Microstructural Investigation and Analysis, 90–95. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2006. http://dx.doi.org/10.1002/3527606165.ch14.

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Conference papers on the topic "Microstructural analysis"

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Redkin, Konstantin V., C. Isaac Garcia, and Anthony J. DeArdo. "Microstructural Analysis of Thermite Welds." In ASME 2010 Rail Transportation Division Fall Technical Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/rtdf2010-42001.

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Thermite welding is a simple and cost-effective process widely used in the field for rail repair and joining. Despite the well-accepted use of this technology, there is a major concern regarding the soundness of the weldments which are often found to be very sensitive to wear and cracking. In order to gain a better understanding of the structural factors that contribute to the performance behavior of thermite welds, systematic microstructural analyses of a series of welds was conducted. Of particular interest in this study was to carefully examine and compare the microstructure of the weld metal, heat affected zone (HAZ) and base metal of a series of thermite welded samples with different carbon content. The results of this work revealed the presence of proeutectoid cementite along the prior austenite grain boundaries at the three locations examined. In addition, microhardness evaluation of the welds revealed that substantial softening takes place in the HAZ, independent of the chemical composition of the rails or weld processing conditions. The presence of proeutectoid cementite along the prior austenite grain boundaries and the softening that takes place in the HAZ are two of the structural factors most likely responsible for the lower than expected wear behavior observed in welded or repaired rail steels. This paper will present and discuss the microstructural and processing factors associated with the formation of proeutectoid cementite and the causes leading to the observed softening.

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Redkin, Konstantin V., C. Isaac Garcia, Anthony J. DeArdo, Daniel Gutscher, and Semih Kalay. "Microstructural Analysis of Thermite Welds." In 2010 Joint Rail Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/jrc2010-36086.

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Thermite welding is a simple and cost-effective process widely used in the field for rail repair and joining. Despite the well-accepted use of this technology, there is a major concern regarding the soundness of the weldments which are often found to be very sensitive to wear and cracking. In order to gain a better understanding of the structural factors that contribute to the performance behavior of thermite welds, systematic microstructural analyses of a series of welds was conducted. Of particular interest in this study was to carefully examine and compare the microstructure of the weld metal, heat affected zone (HAZ) and base metal of a series of thermite welded samples with different carbon content. The results of this work revealed the presence of proeutectoid cementite along the prior austenite grain boundaries at the three locations examined. In addition, microhardness evaluation of the welds revealed that substantial softening takes place in the HAZ, independent of the chemical composition of the rails or weld processing conditions. The presence of proeutectoid cementite along the prior austenite grain boundaries and the softening that takes place in the HAZ are two of the structural factors most likely responsible for the lower than expected wear behavior observed in welded or repaired rail steels. This paper will present and discuss the microstructural and processing factors associated with the formation of proeutectoid cementite and the causes leading to the observed softening.

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Bechtel, Stephen, Gregory Washington, Farzad Ahmadkhanlou, and Yingru Wang. "Microstructural Analysis and Control of Magneto-Rheological Fluid." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61693.

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Characteristic phenomenological behavior of MR fluids is typically modeled by Bingham’s equation, which has no fundamental connection to the microstructure of MR fluid and the fully coupled mechanical-electrical-magnetic equations. In this paper microstructurally, kinetic theory-based model of MR fluids (consisting of micro-sized ferrous particles suspended in a Newtonian fluid) are developed. For modeling these composite systems, dumbbell models in which two beads joined by an elastic connector are investigated. In these models the distributed forces from the carrier fluid and from the magnetic field on the suspended particle are idealized as being localized on beads. Microscale constitutive equations relating flow, stress, and particle orientation are produced by integrating the coupled equations governing forces, flow, and orientation over a representative volume of particles and carrier fluid. Coefficients in the constitutive equations are specified not by a fit to macroscale experimental flow measurement but rather in terms of primitive measurements of particle microstructure, carrier fluid, viscosity and density, and temperature. These new models for MR fluids are three dimensional and applicable to any flow geometry, while the Bingham plastic model is in general applicable only to shear flow. The models in this paper reduce to forms similar to Bingham’s model in a simple shear flow, but with coefficients which arise from fundamental electromagnetic considerations and microstructural features such as geometrical, magnetic and mechanical characterization of the particles, quantities measured primitively from the carrier fluid, magnetic field and temperature.

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Xu, Hongyi, Yang Li, Catherine Brinson, and Wei Chen. "Descriptor-Based Methodology for Designing Heterogeneous Microstructural Materials System." In ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/detc2013-12232.

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In designing a microstructural materials system, there are several key questions associated with design representation, design evaluation, and design synthesis: how to quantitatively represent the design space of a heterogeneous microstructure system using a small set of design variables, how to efficiently reconstruct statistically equivalent microstructures for design evaluation, and how to quickly search for the optimal microstructure design to achieve the desired material properties. This paper proposes a new descriptor-based methodology for designing microstructural materials systems. A descriptor-based characterization method is proposed to provide a quantitative representation of material morphology using a small set of microstructure descriptors covering features of material composition, dispersion status, and phase geometry at different levels of representation. A descriptor-based multi-phase microstructure reconstruction algorithm is developed which allows efficient stochastic reconstruction of microstructures for Finite Element Analysis (FEA) of material behavior. The choice of descriptors for polymer nanocomposites is verified by establishing a mapping between the finite set of descriptors and the infinite dimensional correlation function. Finally, the descriptor-based representation allows the use of parametric optimization approach to search the optimal microstructure design that meets the target material properties. To improve the search efficiency, this paper employs state-of-the-art computational design methods such as Design of Experiment (DOE), metamodeling, statistical sensitivity analysis, and multi-objective optimization. The proposed methodology is demonstrated using the design of a polymer nanocomposites system.

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Blann, G. A., and G. Lucas. "Resin/Diamond Surfaces Enhance Microstructural Analysis of 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.itsc2005p1511.

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Abstract Microstructural analysis has played, and continues to play, a key role in the development of thermally sprayed coatings. The advances in equipment and consumable technology for evaluating coatings have enabled laboratory personnel to accurately observe the coating characteristics in a cost effective manner and with great confidence. Microstructural analysis has been important in the development of new thermally sprayed coatings used for aerospace, automotive, electronic, bio-technology, petroleum and other high and low tech applications. The coatings that are being developed consist of a combination of materials that vary in hardness and general microstructural characteristics. Accurate microstructural analysis is more important than ever because these new, complex coatings cannot be produced successfully without control of the microstructure. Established metallographic techniques have not always been able to produce accurate results. A resin bonded diamond surface was developed which reduces the damage created during the grinding and lapping of a variety of coating types while maintaining the flatness and integrity of the overall coating microstructure.

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Walther, T., K. Terzic, T. Donath, H. Meine, F. Beckmann, and H. Thoemen. "Microstructural analysis of lignocellulosic fiber networks." In SPIE Optics + Photonics, edited by Ulrich Bonse. SPIE, 2006. http://dx.doi.org/10.1117/12.679050.

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7

Sooby, E., and T. Kirtley. "Fabrication and Microstructural Analysis of U6Fe." In 2020 ANS Virtual Winter Meeting. AMNS, 2020. http://dx.doi.org/10.13182/t123-33436.

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Guo, Zheying, and Raffaella De Vita. "Microstructural Constitutive Equation for Sprain Analysis." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67709.

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A new constitutive equation is presented to describe the damage evolution process in parallel fibered collagenous tissues such as ligaments and tendons. The model is formulated by accounting for the fibrous structure of the tissues. The tissue’s stress is defined as the average of the collagen fiber’s stresses. The fibers are assumed to be undulated and straighten out at different stretches that are defined by a Weibull probability density function. After becoming straight each fiber is assumed to be linear elastic. Its waviness is defined by a Weibull distribution. Tissue’s damage is assumed to occur at the fiber level and is defined as a reduction in the fiber’s stiffness. The proposed model is validated by using experimental data published in the biomechanics literature by Provenzano et al. [1].

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Tomic, Aleksandar, Alfio Grillo, and Salvatore Federico. "Microstructural computational modelling of soft tissues." In PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014 (ICNAAM-2014). AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4912676.

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Tait, Kimberly, Lee White, James Darling, Tanya Kizovski, Joseph Dunlop, and Desmond Moser. "Quantitative Microstructural Analysis of Olivine and Ringwoodite." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2528.

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Reports on the topic "Microstructural analysis"

1

Stoller, R. E., P. M. Rice, and K. Farrell. Microstructural analysis of radiation effects. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/223655.

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2

Notis, M. High resolution microstructural and microchemical analysis of zirconia eutectic interfaces. Office of Scientific and Technical Information (OSTI), March 1993. http://dx.doi.org/10.2172/6658247.

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Notis, M. R. High resolution microstructural and microchemical analysis of zirconia eutectic interfaces. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/5766943.

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Hashimoto, N., J. P. Robertson, A. F. Rowcliffe, and E. Wakai. Microstructural analysis of ferritic-martensitic steels irradiated at low temperature in HFIR. Office of Scientific and Technical Information (OSTI), September 1998. http://dx.doi.org/10.2172/330625.

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Finkeldei, Sarah C., James O. Kiggans, Jr., Rodney Dale Hunt, Kurt A. Terrani, and Andrew T. Nelson. Fabrication and microstructural analysis of ceramic fuel derived from sol-gel and powder routes. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1470877.

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Vianco, P. T., and J. A. Rejent. A microstructural analysis of solder joints from the electronic assemblies of dismantled nuclear weapons. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/481579.

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Doyle, Peter, Andrew Nelson, and Jason Harp. MICROSTRUCTURAL ANALYSIS OF IRON-CHROMIUM-ALUMINUM SAMPLES EXPOSED TO LOCA-TYPE CONDITIONS FOLLOWED BY QUENCH. Office of Scientific and Technical Information (OSTI), September 2021. http://dx.doi.org/10.2172/1840169.

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8

Notis, M. R. High resolution microstructural and microchemical analysis of zirconia eutectic interfaces. Progress report, July 1991--June 1992. Office of Scientific and Technical Information (OSTI), January 1992. http://dx.doi.org/10.2172/10123432.

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9

Notis, M. R. High resolution microstructural and microchemical analysis of zirconia eutectic interfaces. Progress report, July 1, 1992--June 30, 1993. Office of Scientific and Technical Information (OSTI), March 1993. http://dx.doi.org/10.2172/10136836.

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Cummins, Dustin Ray, Sven C. Vogel, Kendall Jon Hollis, Donald William Brown, and David E. Dombrowski. Non-destructive Quantitative Phase Analysis and Microstructural Characterization of Zirconium Coated U-10Mo Fuel Foils via Neutron Diffraction. Office of Scientific and Technical Information (OSTI), October 2016. http://dx.doi.org/10.2172/1329816.

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