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Journal articles on the topic 'Material Transformations'

Author: Grafiati

Published: 18 May 2024

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1

Margienė, Asta, and Simona Ramanauskaitė. "Toward Adaptability of E-Evaluation: Transformation from Tree-Based to Graph-Based Structure." Applied Sciences 11, no. 9 (2021): 4082. http://dx.doi.org/10.3390/app11094082.

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The COVID-19 pandemic and quarantine have forced students to use distance learning. Modern information technologies have enabled global e-learning usage but also revealed a lack of personalization and adaptation in the learning process when compared to face-to-face learning. While adaptive e-learning methods exist, their practical application is slow because of the additional time and resources needed to prepare learning material and its logical adaptation. To increase e-learning materials’ usability and decrease the design complexity of automated adaptive students’ work evaluation, we propose

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Gorobets, Valery, Ievgen Antypov, Viktor Trokhaniak, and Yurii Bohdan. "Experimental and numerical studies of heat and mass transfer in low-temperature heat accumulator with phase transformations of accumulating material." MATEC Web of Conferences 240 (2018): 01009. http://dx.doi.org/10.1051/matecconf/201824001009.

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Accumulation of thermal energy is produced with the aim of storing at certain times, when there is an overabundance of this energy and its further use in other periods of time when there is a deficit thermal energy. Thermal energy storage may be carried out under heating of any material (water, solid materials etc.) or by using the phase or chemical transformation of the material (melting and crystallization processes, direct and reverse chemical reaction). Thermal accumulators with phase or chemical transformations are allowed to concentrate a large amount of energy in a relatively small volu

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Antoni, Grégory. "Effects of ThermoMechanical Coupling in Tribological Surface Transformations: A One-Dimensional Modelling Including Irreversible Solid-Solid Phase Transformations and Classical Plasticity." Journal of Materials 2013 (April 28, 2013): 1–7. http://dx.doi.org/10.1155/2013/892050.

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Under compressive loads combined with friction, some materials undergo Tribological Surface Transformations (TSTs) on the surface of the loaded parts and in the immediately vicinity, which in the case of metals, are known as irreversible solid-solid phase transformations. During the solid-solid phase transformations occurring under mechanical loads, TRansformation Induced Plasticity (TRIP) processes are generated at much lower stress levels than those associated with the yield strength of the material in classical plasticity. In order to assess the effects of thermomechanical coupling in these

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Weng, Zi-Hua. "Basic postulates of some coordinate transformations within material media." AIP Advances 12, no. 12 (2022): 125016. http://dx.doi.org/10.1063/5.0132194.

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This paper aims to explore the physical quantities of several invariants, including the basic postulates of some types of crucial coordinate transformations, conservation laws, and continuity equations, in the electromagnetic and gravitational fields. Maxwell first utilized quaternions to describe the electromagnetic theory. Subsequent scholars make use of octonions to study the physical properties of electromagnetic and gravitational fields simultaneously, including the octonion field strength, field source, angular momentum, torque, and force. When an octonion coordinate system transforms ro

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Cottam, Ryan, Vladimir Luzin, Kevin Thorogood, Yat C. Wong, and Milan Brandt. "The Role of Metallurgical Solid State Phase Transformations on the Formation of Residual Stress in Laser Cladding and Heating." Materials Science Forum 777 (February 2014): 19–24. http://dx.doi.org/10.4028/www.scientific.net/msf.777.19.

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There are two major types of solid state phase transformations in metallic materials; the formation of second phase particles during heat treatments, and the transformation of the matrix from one crystalline packing arrangement to another during either heating or cooling. These transformations change the spacing between adjacent atoms and can thus influence the residual stress levels formed. The heating and cooling cycles of materials processing operations using lasers such as cladding and melting/heating, can induce phase transformations depending on the character of the material being proces

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Waimann, Johanna, Philipp Junker, and Klaus Hackl. "A variational material model for transformation-induced plasticity in polycrystalline steels." Journal of the Mechanical Behavior of Materials 24, no. 5-6 (2015): 153–59. http://dx.doi.org/10.1515/jmbm-2015-0022.

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AbstractThis work presents a variational material model for transformation-induced plasticity in steels. We will use the principle of the minimum of the dissipation potential to develop a coupled material model for plastic deformations and phase transformations that simultaneously accounts for the hardening effects that play an important role. We will use a polycrystalline approach and introduce a combined Voigt/Reuß bound and a coupled ansatz for the dissipation functional to model the simultaneous effects of plastic deformations and phase transformations. Finally, we will present the first n

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Jensen, Casper Bruun. "Material Itineraries: Southeast Asian Urban Transformations." East Asian Science, Technology and Society: An International Journal 15, no. 2 (2021): 124–34. http://dx.doi.org/10.1080/18752160.2021.1917840.

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8

Gubin, Sergey P. "Triad matter –- substance – material." Radioelectronics. Nanosystems. Information Technologies. 14, no. 3 (2022): 341–48. http://dx.doi.org/10.17725/rensit.2022.14.341.

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An essay on the philosophical aspects of materials science in the absence of a modern philosophical category "material" is presented. The features of the categories "substance" and "material" are considered, which express the distinctive properties of the corresponding objects of nature - the formlessness of the substance and the proper form of the material, the size of the particles of the substance and the structural form of the material. Substance-material mutual transformations, their energy aspects, a certain conditionality of the substance-material boundary, and adequate filling of the c

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Ding, Zi Shan, Bei Zhi Li, Pan Zou, and Steven Y. Liang. "Material Phase Transformation during Grinding." Advanced Materials Research 1052 (October 2014): 503–8. http://dx.doi.org/10.4028/www.scientific.net/amr.1052.503.

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This study investigated the process parameters effect on the phase transformation during grinding by experimental validation and correlation analyses. The quantitative material phase link to the kinetics of diffusion-controlled as well as diffusionless transformations in different strain rate and contact zone temperature by examining process parameters is presented. Based upon the mechanical physics-based modeling and prediction for the volume fraction of phase transformation in continuous heating under anisothermal conditions, the correlation between volume fractions of phase in sequential se

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Hubbell, Jeffrey A. "In Situ Material Transformations in Tissue Engineering." MRS Bulletin 21, no. 11 (1996): 33–35. http://dx.doi.org/10.1557/s0883769400031821.

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Novel applications exist for biomedical materials that can undergo transitions in material properties in situ—that is, at the site of implantation in the body. Such transitions in polymeric biomaterials can be accomplished by crosslinking a material in situ, by heating or cooling to induce thermal transitions, and by precipitating polymer from solution in situ. This article will point out the need for materials that can be induced to undergo such transitions in situ and will describe selected tissue-engineering approaches that have been employed for this purpose.Delivering materials to the bod

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Burow, Juri, Egor Prokofiev, Christoph Somsen, Jan Frenzel, Ruslan Valiev, and Gunther F. Eggeler. "Martensitic Transformations and Functional Stability in Ultra-Fine Grained NiTi Shape Memory Alloys." Materials Science Forum 584-586 (June 2008): 852–57. http://dx.doi.org/10.4028/www.scientific.net/msf.584-586.852.

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Martensitic transformations in NiTi shape memory alloys (SMAs) strongly depend on the microstructure. In the present work, we investigate how martensitic transformations are affected by various types of ultra-fine grained (UFG) microstructures resulting from various processing routes. NiTi SMAs with UFG microstructures were obtained by equal channel angular pressing, high pressure torsion, wire drawing and subsequent annealing treatments. The resulting material states were characterized by transmission electron microscopy and differential scanning calorimetry (DSC). The three thermomechanical

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Esmonde, Harry. "Fractal and Fractional Derivative Modelling of Material Phase Change." Fractal and Fractional 4, no. 3 (2020): 46. http://dx.doi.org/10.3390/fractalfract4030046.

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An iterative approach is taken to develop a fractal topology that can describe the material structure of phase changing materials. Transfer functions and frequency response functions based on fractional calculus are used to describe this topology and then applied to model phase transformations in liquid/solid transitions in physical processes. Three types of transformation are tested experimentally, whipping of cream (rheopexy), solidification of gelatine and melting of ethyl vinyl acetate (EVA). A liquid-type model is used throughout the cream whipping process while liquid and solid models ar

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Antoni, Grégory, Frédéric Lebon, and Thierry Désoyer. "Return Mapping Algorithms (RMAs) for Two-Yield Surface Thermoviscoplastic Models Using the Consistent Tangent Operator." International Journal of Nonlinear Sciences and Numerical Simulation 19, no. 7-8 (2018): 681–97. http://dx.doi.org/10.1515/ijnsns-2017-0073.

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AbstractThe return mapping algorithms (RMAs) presented here are designed for use with pressure-dependent thermoviscoplastic constitutive models involving irreversible effects associated with solid–solid phase transformations. During the volume solid–solid phase transformations occurring under mechanical loads, an “anomalous” plasticity, the so-called “TRansformation Induced Plasticity” (TRIP), is generated at much lower stress levels than those related to the yield stress of the material in the context of the classical plasticity. TRIP mechanisms are superimposed on the classical plasticity wh

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de Bortoli, Daniel, Fauzan Adziman, Eduardo A. de Souza Neto, and Francisco M. Andrade Pires. "Constitutive modelling of mechanically induced martensitic transformations." Engineering Computations 35, no. 2 (2018): 772–99. http://dx.doi.org/10.1108/ec-03-2017-0087.

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Purpose The purpose of this work is to apply a recently proposed constitutive model for mechanically induced martensitic transformations to the prediction of transformation loci. Additionally, this study aims to elucidate if a stress-assisted criterion can account for transformations in the so-called strain-induced regime. Design/methodology/approach The model is derived by generalising the stress-based criterion of Patel and Cohen (1953), relying on lattice information obtained using the Phenomenological Theory of Martensite Crystallography. Transformation multipliers (cf. plastic multipliers

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Miryuk, O. A. "Thermal Transformations of the Technogenic Component of the Cement Raw Material Mixture." Ecology and Industry of Russia 24, no. 4 (2020): 36–41. http://dx.doi.org/10.18412/1816-0395-2020-4-36-41.

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There are presented the results of physicochemical studies of the composition and thermal transformations og large-tonnage wastes of beneficiation of scarnified-magnetite ores from Kazakhstan. To determine the composition of materials and thermal transformations, the following methods were used: X-ray phase analysis, differential-thermal analysis, Mцssbauer and infrared spectroscopy. There was revealed the stepwise nature of the transformation of anthropogenic material during roasting, due to polymineral composition of ore beneficiation. It has been established that the chemical-mineral charac

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Urzhumov, Yaroslav, Fabrizia Ghezzo, John Hunt, and David R. Smith. "Acoustic cloaking transformations from attainable material properties." New Journal of Physics 12, no. 7 (2010): 073014. http://dx.doi.org/10.1088/1367-2630/12/7/073014.

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Eremets, M., I. Trojan, and S. Medvedev. "Phase transformations in silane – hydrogen-dominant material." Acta Crystallographica Section A Foundations of Crystallography 64, a1 (2008): C100. http://dx.doi.org/10.1107/s0108767308096803.

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Correa, David, Athina Papadopoulou, Christophe Guberan, et al. "3D-Printed Wood: Programming Hygroscopic Material Transformations." 3D Printing and Additive Manufacturing 2, no. 3 (2015): 106–16. http://dx.doi.org/10.1089/3dp.2015.0022.

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Chen, Chunlin, Deqiang Yin, Takeharu Kato, et al. "Stabilizing the metastable superhard material wurtzite boron nitride by three-dimensional networks of planar defects." Proceedings of the National Academy of Sciences 116, no. 23 (2019): 11181–86. http://dx.doi.org/10.1073/pnas.1902820116.

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Wurtzite boron nitride (w-BN) is a metastable superhard material that is a high-pressure polymorph of BN. Clarifying how the metastable high-pressure material can be stabilized at atmospheric pressure is a challenging issue of fundamental scientific importance and promising technological value. Here, we fabricate millimeter-size w-BN bulk crystals via the hexagonal-to-wurtzite phase transformation at high pressure and high temperature. By combining transmission electron microscopy and ab initio molecular dynamics simulations, we reveal a stabilization mechanism for w-BN, i.e., the metastable h

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20

Koroni, Cyrus, Tristan Olsen, Janelle P. Wharry, and Hui Xiong. "Irradiation-Induced Amorphous-to-Crystalline Phase Transformations in Ceramic Materials." Materials 15, no. 17 (2022): 5924. http://dx.doi.org/10.3390/ma15175924.

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Amorphous ceramics are a unique class of materials with unusual properties and functionalities. While these materials are known to crystallize when subjected to thermal annealing, they have sometimes been observed to crystallize athermally when exposed to extreme irradiation environments. Because irradiation is almost universally understood to introduce disorder into materials, these observations of irradiation-induced ordering or crystallization are unusual and may partially explain the limited research into this phenomenon. However, the archival literature presents a growing body of evidence

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Schmidt, Ina. "A Phenomenological Model for Superelastic NiTi Wires Based on Plasticity With Focus on Strain-Rate Dependency Caused by Temperature." Journal of Engineering Materials and Technology 128, no. 3 (2006): 279–84. http://dx.doi.org/10.1115/1.2204940.

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A simple one-dimensional model has been developed to illustrate methods to account for transformation bands in plasticity-based models. Austenite-martensite and martensite-austenite transformations are described by two transformation surfaces in analogy to yield surfaces in plasticity theory. The strain-rate dependence of the material behavior is caused solely by the latent heat of the transformations. Optical and thermographical experiments have been carried out to clarify the dependence of the transformation bands on the distribution of latent heat and therefore on the thermomechanical behav

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Joosten, Martina M. "Numerical Analysis of the Effect of Phase Transformation on Residual Stresses in an Autogenous Beam Edge Weld." Materials Science Forum 768-769 (September 2013): 652–59. http://dx.doi.org/10.4028/www.scientific.net/msf.768-769.652.

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This paper presents the numerical analysis of phase proportions and residual stresses in an autogenous beam edge weld. The thin beam was welded running a heat source along its longer edge using a TIG process. There is no addition of any material so the focus of modelling the process could be concentrated on the thermal analysis and the phase transformations. Temperature dependent material properties and a continuous cooling transformation (CCT) diagram of the base material were provided. The simulations took into account metallurgical effects and used a Goldak-type heat source. Simulations wit

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Issers, Oxana. "Potential of Transformations in Polycode Internet Meme Within the Event-Related Context of 2020." Vestnik Volgogradskogo gosudarstvennogo universiteta. Serija 2. Jazykoznanije, no. 2 (June 2021): 26–41. http://dx.doi.org/10.15688/jvolsu2.2021.2.3.

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The article deals with a specific polycode text that functions in the field of virtual communication – Internet meme. The focus is on its regular transformations. Considering possible methodological approaches to the analysis of this phenomenon, the author comes to the conclusion about the efficiency of using the methodology of intertext linguistic theory. The essential characteristic of a meme is its transformational potential, which allows to create new meanings and use this communication unit in a wide range of relevant contexts. The polycode structure of a meme determines the spectrum of i

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Bragan, Ken. "Transformations of Narcissism." Australian & New Zealand Journal of Psychiatry 23, no. 2 (1989): 207–11. http://dx.doi.org/10.3109/00048678909062137.

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The self's contrary needs for separateness and for belonging are introduced as a significant polarity in the developmental process, and one which narcissistic persons have failed to resolve in a particular way resulting in a sense of self-distinction but with increasing alienation. Clinical material and material from literature are used to demonstrate this, as well as to raise the possibility that transformations of narcissism sometimes can occur quite quickly. The theoretical implications of this possibility are considered and Jungian ideas put forward as a possible explanation. Finally, brie

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Carmona, José A., Carlos Rodríguez-Franco, Rosario Fernández, Valentín Hornillos, and José M. Lassaletta. "Atroposelective transformation of axially chiral (hetero)biaryls. From desymmetrization to modern resolution strategies." Chemical Society Reviews 50, no. 5 (2021): 2968–83. http://dx.doi.org/10.1039/d0cs00870b.

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Atroposelective transformations of (hetero)biaryls are classified into desymmetrization, kinetic resolution, dynamic kinetic resolution, and dynamic kinetic asymmetric transformation depending on the nature and behavior of the starting material.

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Alipour Skandani, A., R. Ctvrtlik, and M. Al-Haik. "A Novel In-Situ Nanoindentation Characterization of Phase Transforming Materials." MRS Proceedings 1754 (2015): 19–24. http://dx.doi.org/10.1557/opl.2015.198.

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ABSTRACTMaterials with different allotropes can undergo one or more phase transformations based on the changes in the thermodynamic states. Each phase is stable in a certain temperature/pressure range and can possess different physical and mechanical properties compared to the other phases. The majority of material characterizations have been carried out for materials under equilibrium conditions where the material is stabilized in a certain phase and a lesser portion is devoted for onset of transformation. Alternatively, in situ measurements can be utilized to characterize materials while und

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Schmidt, Filipp. "The Art of Shaping Materials." Art and Perception 8, no. 3-4 (2019): 407–33. http://dx.doi.org/10.1163/22134913-20191116.

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Material perception — the visual perception of stuff — is an emerging field in vision research. We recognize materials from shape, color and texture features. This paper is a selective review and discussion of how artists have been using shape features to evoke vivid impressions of specific materials and material properties. A number of examples are presented in which visual artists render materials or their transformations, such as soft human skin, runny or viscous fluids, or wrinkled cloth. They achieve this by expressing the telltale shape features of these materials and transformations, of

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Nikitina, Tatiana G., and Elena I. Rogaleva. "Russian proverbs in linguo-axiological and lexicographic interpretation: Traditions and innovations." Voprosy leksikografii, no. 24 (2022): 70–92. http://dx.doi.org/10.17223/22274200/24/4.

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The aim of the research presented in this article is to develop the concept of a linguo-axiological dictionary representation of proverbs and proverbial concepts in their current state, taking into account various structural and semantic transformations and new axiological components of their meaning. The sources of the material of the study were the paroemiological collections of I. M. Snegirev, I. I. Illustrov, V. I. Dahl, and modern authors; Internet sites; and recordings of live speech of modern native speakers of the Russian language. The development of the lexicographic aspect of the top

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Knitter, Daniel, Jan Piet Brozio, Wolfgang Hamer, Rainer Duttmann, Johannes Müller, and Oliver Nakoinz. "Transformations and Site Locations from a Landscape Archaeological Perspective: The Case of Neolithic Wagrien, Schleswig-Holstein, Germany." Land 8, no. 4 (2019): 68. http://dx.doi.org/10.3390/land8040068.

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Societies undergo continuous dynamics and change. By investigating the spatial structure of societal remains and material culture, we tried to get insights into the processes of their landscapes creation. Ritual practices, economic strategies, or the societal structure are stored in the landscape as a form of cultural contextualization. We presumed that changes of these will be strongest during phases of transformation and investigated to which degree transformation processes are mirrored in the spatial structure of material remains. Absolute and relative locations were investigated using data

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Kryvytskyi, Y. V. "Legal transformation as a component of modern legal development." TRANSFORMATION LEGISLATION OF UKRAINE IN MODERN CONDITIONS DOCTRINAL APPROACHES AND MEASUREMENTS, no. 14 (September 2023): 248–53. http://dx.doi.org/10.33663/2524-017x-2023-14-248-253.

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The article summarizes, expands and substantiates scientific knowledge about legal transformation as a component of modern legal development. The problems of transformations are understood by scientists of various directions and branches of social knowledge, primarily philosophers, political scientists, sociologists, economists and lawyers, since historical progress is directly determined by the ideas of democracy, freedom, free market, law and statehood. The points of view available in the specialized literature regarding the understanding of social transformation, its types, forms, trends an

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Eremeyev, Victor A., and Violetta Konopińska-Zmysłowska. "On Dynamic Extension of a Local Material Symmetry Group for Micropolar Media." Symmetry 12, no. 10 (2020): 1632. http://dx.doi.org/10.3390/sym12101632.

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For micropolar media we present a new definition of the local material symmetry group considering invariant properties of the both kinetic energy and strain energy density under changes of a reference placement. Unlike simple (Cauchy) materials, micropolar media can be characterized through two kinematically independent fields, that are translation vector and orthogonal microrotation tensor. In other words, in micropolar continua we have six degrees of freedom (DOF) that are three DOFs for translations and three DOFs for rotations. So the corresponding kinetic energy density nontrivially depen

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Barker, Joshua. "Postscript: Material Itineraries in Southeast Asian Urban Transformations." East Asian Science, Technology and Society: An International Journal 15, no. 2 (2021): 233–37. http://dx.doi.org/10.1080/18752160.2021.1917166.

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Suurla, Susanna. "Material Transformations – Making as a Catalyst of Experience." Research in Arts and Education 2018, no. 3 (2018): 379–403. http://dx.doi.org/10.54916/rae.118875.

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Marinero, E. E. "Material transformations in semiconductor and magnetic thin films." Applied Surface Science 43, no. 1-4 (1989): 117–27. http://dx.doi.org/10.1016/0169-4332(89)90200-6.

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Karlsson, A. M. "On the Mechanical Response in a Thermal Barrier System Due to Martensitic Phase Transformation in the Bond Coat." Journal of Engineering Materials and Technology 125, no. 4 (2003): 346–52. http://dx.doi.org/10.1115/1.1605107.

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Recent studies have shown that Pt-aluminide—a common bond coat material in thermal barrier coatings—undergoes martensitic transformations during thermal cycling. The transformations are associated with both large transformation strain and a strain hysteresis, leading to accumulation of a mismatch strain. Thermal barrier systems based on Pt-aluminide bond coats are susceptible to interfacial morphological instabilities. In this study, we investigate how the cyclic martensitic transformation influences the morphology. Two key results are: (i) the morphological instabilities are highly sensitive

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Adiguzel, Osman. "The Role of Twinned and Detwinned Structures on Memory Behaviour of Shape Memory Alloys." Advanced Materials Research 1105 (May 2015): 78–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1105.78.

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Shape memory alloys have a peculiar property to return to a previously defined shape or dimension when they are subjected to variation of temperature. Shape memory effect is facilitated by martensitic transformation governed by changes in the crystalline structure of the material. Martensitic transformations are first order lattice-distorting phase transformations and occur with the cooperative movement of atoms by means of lattice invariant shears in the materials on cooling from high temperature parent phase region. The material cycles between the deformed and original shapes on cooling and

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Tachoire, H., and V. Torra. "New trends in differential scanning calorimetry." Canadian Journal of Chemistry 67, no. 6 (1989): 983–90. http://dx.doi.org/10.1139/v89-150.

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Recent applications of differential scanning calorimetry in the study of solid–solid transformations are presented. The importance of the deconvolution of the thermograms and of the modelling of the calorimetric equipment is stressed.Investigations of the phase transformations of the martensitic type in shape-memory alloys have made clear the influence of thermomechanical treatment of the material and have evaluated the influence of defects on the dynamics of transformation. A combination of calorimetric and acoustical observations has demonstrated irreversibilities, even in the so-called ther

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Tari, Dariush Ghaffari, Michael J. Worswick, and Usman Ali. "Asymmetric Yield Locus Evolution for HCP Materials: A Continuum Constitutive Modeling Approach." Key Engineering Materials 554-557 (June 2013): 1184–88. http://dx.doi.org/10.4028/www.scientific.net/kem.554-557.1184.

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A continuum-based plasticity approach is considered to model the anisotropic hardening response of hexagonal closed packed (hcp) materials. A Cazacu-Plunkett-Barlat (CPB06) yield surface is modified to create anisotropic hardening in terms of the accumulated plastic strain. The anisotropy and asymmetry parameters are replaced with saturation-type functions and the new modified model is then optimized globally to fit the material response. Furthermore, the effect of the number of linear stress transformations performed on the deviatoric stress tensor is investigated on the capability of the mod

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Ustinova, Daniela V., and Natalia V. Lashtabova. "TRANSLATION TRANSFORMATIONS OF THE LIBRETTO BY N. TATE FOR THE OPERA “DIDO AND AENEAS”." Sovremennye issledovaniya sotsialnykh problem 14, no. 2 (2022): 260–70. http://dx.doi.org/10.12731/2077-1770-2022-14-2-260-270.

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The article is devoted to the analysis of translation transformations in musical compositions. Studies in the field of musical translation and opera compositions were considered, difficulties that an interpreter may face were identified. Using the example of N. Tate’s libretto for the opera “Dido and Aeneas”, the texts of the recitative and Dido’s aria were analyzed, as well as the ways of its translation into Russian. Background. To achieve adequacy in the translation of musical compositions, in particular opera librettos, translators resort to the use of various types of transformation

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Đorđević, Nataša, Slavica Mihajlović, Katarina Pantović-Spajić, Jasmina Lozanović-Šajić, and Mirko Grubišić. "Transformations of mechanochemical activated Na2CO3." Podzemni radovi, no. 41 (2022): 15–21. http://dx.doi.org/10.5937/podrad2241015q.

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During mechanical activation, energy of treated material is increase to a higher level. This can lead to chemical transformation of the activated material. This is the point where we can talk about mechanochemical transformations that have occurred as a result of mechanical activation. The subject of this paper is to monitor mass changes of material after different degrees of activation. One of the substances which is often used in the processes of mechanochemical synthesis is sodium carbonate. The mass changes occurring during the treatment were detected and measured by various methods, depen

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Pirouz, Pirouz. "Stress-Induced Phase Transformations in SiC." Microscopy and Microanalysis 4, S2 (1998): 548–49. http://dx.doi.org/10.1017/s1431927600022868.

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Tetrahedrally co-ordinated materials can undergo stress-induced structural transformations often under invariant plane strain conditions; examples of such transformations are twinning and polytypism. The structure of a tetrahedrally co-ordinated material, XY, may be considered in terms of an assembly of “normal”, Ti’and “twinned” tetrahedra, T'I’all connected to each other at their corners. In some of these materials, e.g. SiC, GaN or CdS, these corner-sharing tetrahedra may be connected to each other in different ways, giving rise to different polytypes. In this paper, a dislocation model for

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Baihaki, Baihaki, Soraya Djamilah, and Ahmad Lazwardi. "DEVELOPING INTERACTIVE LEARNING MEDIA BASED ON ADOBE ANIMATE APPLICATIONS FOR GEOMETRY TRANSFORMATION." Kalamatika: Jurnal Pendidikan Matematika 7, no. 2 (2022): 191–206. http://dx.doi.org/10.22236/kalamatika.vol7no2.2022pp191-206.

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Some mathematical material will be challenging to understand without learning media, primarily topics that requires visualization, such as geometric transformations. This study aims to describe the process of developing interactive learning media based on the Adobe Animate application of geometry transformation. It also describes the validity and practicality of the developed learning media. This type of research is research and development. The product developed was an interactive learning media application on geometry transformation material created using Adobe Animate. The development model

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Liu, Xueyan, Hongwei Li, and Mei Zhan. "A review on the modeling and simulations of solid-state diffusional phase transformations in metals and alloys." Manufacturing Review 5 (2018): 10. http://dx.doi.org/10.1051/mfreview/2018008.

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Solid-state diffusional phase transformations are vital approaches for controlling of the material microstructure and thus tailoring the properties of metals and alloys. To exploit this mean to a full extent, much effort is paid on the reliable and efficient modeling and simulation of the phase transformations. This work gives an overview of the developments in theoretical research of solid-state diffusional phase transformations and the current status of various numerical simulation techniques such as empirical and analytical models, phase field, cellular automaton methods, Monte Carlo models

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Mahesh, K. K., and F. M. Braz Fernandes. "Phase transformations in Ni-Ti SMA spring." Journal of Physics: Conference Series 2603, no. 1 (2023): 012017. http://dx.doi.org/10.1088/1742-6596/2603/1/012017.

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Abstract Equi-atomic Nickel-Titanium (Ni-Ti) alloy is one of the prominent materials to exhibit two way shape memory effect (TWSME). Since the material by itself can change shape due to variation in temperature, it is also used as an actuator. In the present study, Ni-Ti (49.5at%Ni-Ti) alloy wire is converted into a spring coil with straight portions on either ends by shape setting. Training is provided to the spring coil portion to achieve TWSME. Separate specimens from the spring and straight portions were extracted. Phase transformations were observed in the spring and straight portions dur

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Bobrova, Maria V. "CONTEMPORARY RURAL ZOONYMICON IN THE DERIVATIONAL ASPECT (on the Material of Zoonyms of One Group of Villages)." Вестник Пермского университета. Российская и зарубежная филология 13, no. 2 (2021): 5–13. http://dx.doi.org/10.17072/2073-6681-2021-2-5-13.

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The article is devoted to the study of zoonyms functioning in the speech of the inhabitants of Troel’ga rural settlement, Kungur district (Perm Krai). Methodologically, animal names are considered in the article in line with the theory of derivation, that is, as a result of dynamic processes at different levels of the language system. It is necessary to distinguish between nicknames that appeared in the course of zoonymic transformations and those that appeared due to transformations of ready-made lexical means (products of pre-zoonymic transformations). We have found that the first ones form

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Song, Miao, Zexi Lu, and Dongsheng Li. "Phase transformations among TiO2 polymorphs." Nanoscale 12, no. 45 (2020): 23183–90. http://dx.doi.org/10.1039/d0nr06226j.

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Kromm, Arne, Thomas Kannengiesser, and Jens Gibmeier. "In Situ Observation of Phase Transformations during Welding of Low Transformation Temperature Filler Material." Materials Science Forum 638-642 (January 2010): 3769–74. http://dx.doi.org/10.4028/www.scientific.net/msf.638-642.3769.

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Tensile residual stresses introduced by conventional welding processes diminish the crack resistance and the fatigue lifetime of welded components. In order to generate beneficial compressive residual stresses at the surface of a welded component, various post-weld treatment procedures are available, like shot peening, hammering, etc. These post-weld treatments are, however time and cost extensive. An attractive alternative is to generate compressive stresses over the complete weld joint in the course of the welding procedure by means of so-called Low Transformation Temperature (LTT) filler ma

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Cardone, F., G. Albertini, D. Bassani, et al. "Deformed space–time transformations in Mercury." International Journal of Modern Physics B 31, no. 23 (2017): 1750168. http://dx.doi.org/10.1142/s0217979217501685.

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A mole of Mercury was suitably treated by ultrasound in order to generate in it the same conditions of local Lorentz invariance violation that were generated in a sonicated cylindrical bar of AISI 304 steel and that are the cause of neutron emission during the sonication. After 3 min, part of the mercury turned into a solid material which turned out to contain isotopes having a different mass (higher and lower) with respect to the isotopes already present in the initial material (mercury). These transformations in the atomic weight without gamma production above the background are brought abou

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Vazquez, Elena, Benay Gürsoy, and Jose Pinto Duarte. "Formalizing shape-change: Three-dimensional printed shapes and hygroscopic material transformations." International Journal of Architectural Computing 18, no. 1 (2019): 67–83. http://dx.doi.org/10.1177/1478077119895216.

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Shape-changing materials have become increasingly popular among architects in designing responsive systems. One of the greatest challenges of designing with these materials is their dynamic nature, which requires architects to design with the fourth dimension, time. This article presents a study that formalizes the shape-changing behavior of three-dimensional printed wood-based composite materials and the rules that serve to compute their shape-change in response to variations in relative humidity. In this research, we first developed custom three-dimensional printing protocols and analyzed th

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Serra, M. F., M. S. Conconi, G. Suarez, E. F. Agietti, and N. M. Rendtorff. "Firing transformations of an argentinean calcareous commercial clay." Cerâmica 59, no. 350 (2013): 254–61. http://dx.doi.org/10.1590/s0366-69132013000200010.

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Mineralogical transformations caused by firing are usually studied by XRD methods only semi-quantitatively. In this work the original mineral disappearance and the neo-mineralization were evaluated quantitatively. Furthermore an indirect non crystalline phase quantification was performed under 1100 ºC was also carried out using the quartz content as internal standard. This study specifically discusses the behavior of an Argentinean white calcareous earthenware commercial when subjected to traditional ceramic firing, besides the technological importance of this particular material, it acts as a

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