Log in

Relevant bibliographies by topics / Diffusive phase transformations / Journal articles

To see the other types of publications on this topic, follow the link: Diffusive phase transformations.

Journal articles on the topic 'Diffusive phase transformations'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Diffusive phase transformations.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Arif, Tansel T., and Rong Shan Qin. "A Phase-Field Model for the Formation of Martensite and Bainite." Advanced Materials Research 922 (May 2014): 31–36. http://dx.doi.org/10.4028/www.scientific.net/amr.922.31.

Full text

Abstract:

The phase field method is rapidly becoming the method of choice for simulating the evolution of solid state phase transformations in materials science. Within this area there are transformations primarily concerned with diffusion and those that have a displacive nature. There has been extensive work focussed upon applying the phase field method to diffusive transformations leaving much desired for models that can incorporate displacive transformations. Using the current model, the formation of martensite, which is formed via a displacive transformation, is simulated. The existence of a transfo

APA, Harvard, Vancouver, ISO, and other styles

2

Guttmann, M. "Diffusive Phase Transformations in Hot Dip Galvanizing." Materials Science Forum 155-156 (May 1994): 527–48. http://dx.doi.org/10.4028/www.scientific.net/msf.155-156.527.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Straumal, Boris, Askar Kilmametov, Andrey Mazilkin, et al. "DIFFUSIVE AND DISPLACIVE PHASE TRANSFORMATIONS UNDER HIGH PRESSURE TORSION." Acta Metallurgica Slovaca 25, no. 4 (2019): 230. http://dx.doi.org/10.12776/ams.v25i4.1368.

Full text

Abstract:

<p class="AMSmaintext"><span lang="EN-GB">Severe plastic deformation (SPD) can induce various phase transformations. After a certain strain, the dynamic equilibrium establishes between defects production by an external force and their relaxation (annihilation). The grain size, hardness, phase composition etc. in this steady-state does not depend on the initial state of a material and is, therefore, equifinal. In this review we discuss the competition between precipitation and dissolution of precipitates, amorphization and (nano)crystallization, SPD-induced accelerated mass-transfer

APA, Harvard, Vancouver, ISO, and other styles

4

Ustinovshikov, Y., and B. Pushkarev. "Diffusive phase transformations: Example of Fe–M alloys." Journal of Alloys and Compounds 422, no. 1-2 (2006): 116–27. http://dx.doi.org/10.1016/j.jallcom.2005.11.048.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Bobyr, S. V. "Non-equilibrium thermodynamics model for calculating diffusion fluxes under phase transformations in alloy steels." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 66, no. 1 (2021): 28–36. http://dx.doi.org/10.29235/1561-8358-2021-66-1-28-36.

Full text

Abstract:

The phase transformations in alloyed iron-carbon alloys is largely related to diffusion of components, foremost to the carbon. For the analysis of diffusive processes in alloy steels, it is possible to use the mathematical methods of non-equilibrium thermodynamics. The equation for the diffusive fluxes of the system contains unknown in general case of coefficients activity of elements and vacancies, and their derivatives for to the concentrations, that extraordinarily makes it difficult being of values of cross coefficients. In the article a non-equilibrium thermodynamics methodology of calcul

APA, Harvard, Vancouver, ISO, and other styles

6

Gamsjäger, Ernst. "Kinetics of diffusive phase transformations: From local equilibrium to mobility-driven migration of thick interfaces." Pure and Applied Chemistry 83, no. 5 (2011): 1105–12. http://dx.doi.org/10.1351/pac-con-10-10-02.

Full text

Abstract:

It is a prerequisite for the occurrence of diffusive phase transformations that the system is in an off-equilibrium condition. The time-dependent development of the variables until equilibrium or steady-state conditions are reached can be calculated by solving the evolution equations that can be derived from the principle of maximum entropy production. These equations provide the theoretical framework for the kinetics of diffusive phase transformations. In this work, the development from sharp interface-local equilibrium (SI-LE) models to thick interface-finite mobility (TI-FM) models is revie

APA, Harvard, Vancouver, ISO, and other styles

7

Gamsjäger, E., and M. Rettenmayr. "The kinetics of diffusive phase transformations in the light of trans-interface diffusion." Philosophical Magazine 95, no. 26 (2015): 2851–65. http://dx.doi.org/10.1080/14786435.2015.1078514.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

RoŻniata, E., and R. Dziurka. "The Phase Transformations in Hypoeutectoid Steels Mn-Cr-Ni." Archives of Metallurgy and Materials 60, no. 1 (2015): 497–502. http://dx.doi.org/10.1515/amm-2015-0080.

Full text

Abstract:

Abstract The results of a microstructure and hardness investigations of the hypoeutectoid steels Mn-Cr-Ni, imitating by its chemical composition toughening steels, are presented in the paper. The analysis of the kinetics of phase transformations of undercooled austenite of steels containing different amounts of alloying elements in their chemical composition, constitutes the aim of investigations. Metallographic examinations were carried out on a Axiovert 200 MAT light microscope. Sections were etched with a 3% HNO3 solution in C2H5OH. Dilatometric tests were performed using L78 R.I.T.A dilato

APA, Harvard, Vancouver, ISO, and other styles

9

Winczek, J., and T. Skrzypczak. "Thermomechanical States in Arc Weld Surfaced Steel Elements." Archives of Metallurgy and Materials 61, no. 3 (2016): 1623–34. http://dx.doi.org/10.1515/amm-2016-0264.

Full text

Abstract:

AbstractThe paper presents a model of temperature, phase transformation and stresses fields in a steel element during single-pass Gas Metal Arc Weld (GMAW) surfacing.Kinetics of phase transformations during heating is limited by temperature values at the beginning and at the end of austenitic transformation, while the progress of phase transformations during cooling is determined on the basis of TTT-welding diagram and Johnson-Mehl-Avrami and Kolomogorov law for diffusive transformations and Koistinen-Marburger for martensitic transformation. Stress state of a bar subjected to thermo-mechanica

APA, Harvard, Vancouver, ISO, and other styles

10

Kirkaldy, J. S. "Solitons and wave number selection in first order diffusive phase transformations." Scripta Metallurgica et Materialia 24, no. 12 (1990): 2263–68. http://dx.doi.org/10.1016/0956-716x(90)90076-s.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Gamsjäger, E., Y. Liu, M. Rester, et al. "Diffusive and massive phase transformations in Ti–Al–Nb alloys – Modelling and experiments." Intermetallics 38 (July 2013): 126–38. http://dx.doi.org/10.1016/j.intermet.2013.03.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Tchuindjang, Jérôme Tchoufang, Hakan Paydas, Hoang-Son Tran, et al. "A New Concept for Modeling Phase Transformations in Ti6Al4V Alloy Manufactured by Directed Energy Deposition." Materials 14, no. 11 (2021): 2985. http://dx.doi.org/10.3390/ma14112985.

Full text

Abstract:

The microstructure directly influences the subsequent mechanical properties of materials. In the manufactured parts, the elaboration processes set the microstructure features such as phase types or the characteristics of defects and grains. In this light, this article aims to understand the evolution of the microstructure during the directed energy deposition (DED) manufacturing process of Ti6Al4V alloy. It sets out a new concept of time-phase transformation-block (TTB). This innovative segmentation of the temperature history in different blocks allows us to correlate the thermal histories com

APA, Harvard, Vancouver, ISO, and other styles

13

Svoboda, J., and E. Gamsjäger. "Modelling of diffusive and massive phase transformations in binary systems – thick interface parametric model." International Journal of Materials Research 102, no. 6 (2011): 666–73. http://dx.doi.org/10.3139/146.110518.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Barbe, F., and R. Quey. "A numerical modelling of 3D polycrystal-to-polycrystal diffusive phase transformations involving crystal plasticity." International Journal of Plasticity 27, no. 6 (2011): 823–40. http://dx.doi.org/10.1016/j.ijplas.2010.09.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

LEPTOUKH, GREGORY, BOWE STRICKLAND, and CHRISTOPHER ROLAND. "PHASE SEPARATION OF TWO-DIMENSIONAL FLUID MIXTURES IN THE DISSIPATIVE REGIME." Modern Physics Letters B 10, no. 13 (1996): 577–98. http://dx.doi.org/10.1142/s021798499600064x.

Full text

Abstract:

The phase separation of two-dimensional fluid mixtures was investigated with Molecular Dynamics simulations. The behavior of both single-component and binary mixtures as a function of temperature, volume fraction and average fluid density was studied. Binary systems with a size mismatch were also considered. In all cases, the diffusive coalescence of clusters is the primary mechanism of growth. In binary systems, the shape transformations of merging droplets induce important long-range flows at high volume fractions.

APA, Harvard, Vancouver, ISO, and other styles

16

Chmiela, Bartosz, Marta Kianicová, and Maria Sozańska. "Degradation of Diffusive Aluminide Coating after Service in ZhS6K Superalloy." Solid State Phenomena 227 (January 2015): 349–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.227.349.

Full text

Abstract:

We considered the degradation of hollow turbine blades made of ZhS6K nickel-based superalloy after service in an aircraft engine. The blades were coated with a diffusive aluminide coating (Al-Si) to improve resistance to oxidation and hot corrosion. Turbine blades work under extreme conditions and a complex state of stress. During service, creep and fatigue occur. The interaction among hot combustion gases causes oxidation of the surface layer, hot corrosion, and micro-cracking of the coating. Moreover, changes occur in the morphology of theγ’phase just under the coating, and transformations o

APA, Harvard, Vancouver, ISO, and other styles

17

Pacyna, J. "Crack resistance of tool steels corresponding with the chemical composition of their matrices." Archives of Materials Science and Engineering 1, no. 86 (2017): 5–14. http://dx.doi.org/10.5604/01.3001.0010.4868.

Full text

Abstract:

Purpose: of the presented investigations was showing that the crack resistance of tool steels depends on their hardenability and phase transformations occurring in the quenched matrix at tempering. The chemical composition of austenite decides on the steel hardenability while phase transformations after tempering can be influenced (apart from the chemical composition) by the heating method. Design/methodology/approach: of investigations was based on the analysis of dilatograms and the achieved aim was to obtain the hard tool steel (app. 500 HV30) for hot works. Samples of a diameter of 10 mm (

APA, Harvard, Vancouver, ISO, and other styles

18

Sozańska, Maria, Bartosz Chmiela, Marta Kianicova, and Jan Cwajna. "Degradation of Microstructure after Service in ZhS6k Superalloy with Diffusive Aluminide Coating." Solid State Phenomena 186 (March 2012): 143–46. http://dx.doi.org/10.4028/www.scientific.net/ssp.186.143.

Full text

Abstract:

This paper presents the degradation of hollow turbine blades made of ZhS6K nickel-based superalloy after service in DV2 aero engines. The blades were coated with a diffusive aluminide coating (Al-Si) to improve the oxidation and hot corrosion resistance. Turbine blades work under extreme conditions and a complex state of stress. During service, creep and fatigue of various natures take place. The interaction among hot combustion gases causes oxidation of the surface layer and hot corrosion and micro cracking of the coating. Moreover, changes in morphology of the γ’ phase just under the coating

APA, Harvard, Vancouver, ISO, and other styles

19

Shubin, A. B., K. Y. Shunyaev, V. A. Bykov, and S. I. Noritsin. "Physical Properties of Diffusive-Hardening Alloys of Copper with Gallium and Tin." Defect and Diffusion Forum 312-315 (April 2011): 301–5. http://dx.doi.org/10.4028/www.scientific.net/ddf.312-315.301.

Full text

Abstract:

Gallium-based diffusive-hardening solders do not contain lead. These alloys have specific rheological properties. Their synthesis includes, as a rule, mechanical mixing of such initial components as gallium, copper and tin powders [1]. Then the metallic paste undergoes irreversible phase transformations forming a solid alloy with a specific structure. Here, we investigated microstructures of diffusive-hardened Cu-Ga-Sn alloys by SEM and EDX methods. Thermal diffusivity and heat conductivity of alloys mentioned above were studied by the laser flash method. Also differential scanning calorimetry

APA, Harvard, Vancouver, ISO, and other styles

20

Mourot, Mickael, Alice Courleux, Moukrane Dehmas, et al. "Transformation Kinetics and Resulting Microstructure in MMC Reinforced with TiC Particles." Solid State Phenomena 172-174 (June 2011): 747–52. http://dx.doi.org/10.4028/www.scientific.net/ssp.172-174.747.

Full text

Abstract:

The phase transformation kinetics on cooling and resulting microstructures of steel-based matrix composites (MMC) reinforced with TiC particles by powder metallurgy were studied. In addition, the phase transformation kinetics of the MMC were compared to those of the same steel without TiC and consolidated in the same conditions. The presence of TiC particles strongly favors the diffusive transformations in the steel matrix of the MMC. Different complementary techniques (XRD, SEM, TEM/EDX, atom probe tomography, in situ synchrotron XRD) were performed to analyze the chemical reactivity between

APA, Harvard, Vancouver, ISO, and other styles

21

Siwek, Aleksander. "CFD-based modelling of phase transformation in laser welded low-carbon steel." Welding in the World 65, no. 7 (2021): 1403–14. http://dx.doi.org/10.1007/s40194-021-01130-2.

Full text

Abstract:

AbstractThis paper presents a numerical model of the laser welding of steel, taking into account the heat and mass flows, as well as thermal effects associated with phase transformations. It was assumed that the heat source is a laser with a symmetrical power distribution of the TEM10 beam in two welding condition variants: a stationary heat source and a source moving at a constant speed along the sample. After reaching the melting temperature, the movement of the liquid phase was forced by the Marangoni effect acting on the surface of the welding pool. For the laser power applied, the surface

APA, Harvard, Vancouver, ISO, and other styles

22

Bedjaoui, Nabil, and Philippe G. LeFloch. "Diffusive-dispersive travelling waves and kinetic relations. II A hyperbolic–elliptic model of phase-transition dynamics." Proceedings of the Royal Society of Edinburgh: Section A Mathematics 132, no. 3 (2002): 545–65. http://dx.doi.org/10.1017/s0308210500001773.

Full text

Abstract:

We deal here with a mixed (hyperbolic-elliptic) system of two conservation laws modelling phase-transition dynamics in solids undergoing phase transformations. These equations include nonlinear viscosity and capillarity terms. We establish general results concerning the existence, uniqueness and asymptotic properties of the corresponding travelling wave solutions. In particular, we determine their behaviour in the limits of dominant diffusion, dominant dispersion or asymptotically small or large shock strength. As the viscosity and capillarity parameters tend to zero, the travelling waves conv

APA, Harvard, Vancouver, ISO, and other styles

23

Didus, V. A., S. B. Rybalka, D. Fruchart, and V. A. Goltsov. "Influence of hydrogen pressure on the kinetics of hydrogen-induced diffusive phase transformations in the Nd2Fe14B alloy." Journal of Alloys and Compounds 356-357 (August 2003): 386–89. http://dx.doi.org/10.1016/s0925-8388(03)00224-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Goltsov, Victor A., Elena A. Dodonova, Sergey B. Rybalka, Konstantin P. Skokov, and Yury G. Pastushenkov. "The kinetics of hydrogen-induced diffusive phase transformations in Sm_{2Fe_{17 alloys}}." International Journal of Nuclear Hydrogen Production and Applications 2, no. 1 (2009): 42. http://dx.doi.org/10.1504/ijnhpa.2009.023826.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Zięba, P. "Recent Developments on Discontinuous Precipitation." Archives of Metallurgy and Materials 62, no. 2 (2017): 955–68. http://dx.doi.org/10.1515/amm-2017-0138.

Full text

Abstract:

AbstractThe discontinuous precipitation (DP) belongs to a group of diffusive solid state phase transformations during which the formation of a new phase is heterogeneous and limited to a migrating reaction front (RF). The use of analytical electron microscopy provided reliable information that there is no differences in the diffusion rate at the stationary grain boundary and moving RF of DP reaction. On the other hand, the use of “in situ” transmission electron microscopy observations indicated the importance of stop-go motion or oscillatory movement of the RF.During 2004-2016 period more or l

APA, Harvard, Vancouver, ISO, and other styles

26

Cottura, M., B. Appolaire, A. Finel, and Y. Le Bouar. "Coupling the Phase Field Method for diffusive transformations with dislocation density-based crystal plasticity: Application to Ni-based superalloys." Journal of the Mechanics and Physics of Solids 94 (September 2016): 473–89. http://dx.doi.org/10.1016/j.jmps.2016.05.016.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Cocemasov, Alexandr, Vladimir Brinzari, Do-Gyeom Jeong, et al. "Thermal Transport Evolution Due to Nanostructural Transformations in Ga-Doped Indium-Tin-Oxide Thin Films." Nanomaterials 11, no. 5 (2021): 1126. http://dx.doi.org/10.3390/nano11051126.

Full text

Abstract:

We report on a comprehensive theoretical and experimental investigation of thermal conductivity in indium-tin-oxide (ITO) thin films with various Ga concentrations (0–30 at. %) deposited by spray pyrolysis technique. X-ray diffraction (XRD) and scanning electron microscopy have shown a structural transformation in the range 15–20 at. % Ga from the nanocrystalline to the amorphous phase. Room temperature femtosecond time domain thermoreflectance measurements showed nonlinear decrease of thermal conductivity in the range 2.0–0.5 Wm−1 K−1 depending on Ga doping level. It was found from a comparis

APA, Harvard, Vancouver, ISO, and other styles

28

Rutter, E. H., and K. H. Brodie. "Experimental approaches to the study of deformation/metamorphism relationships." Mineralogical Magazine 52, no. 364 (1988): 35–42. http://dx.doi.org/10.1180/minmag.1988.052.364.03.

Full text

Abstract:

AbstractRock deformation and metamorphism can interact at the mechanistic level in the following ways: (a) facilitation of cataclasis through the release of high-pressure fluid during dehydration and decarbonation reactions; (b) facilitation of intracrystalline plasticity through the stresses induced during solid-state volume changes; (c) enhanced deformability through the transient existence of fine-grained reaction products; (d) modification of chemical potential gradients driving diffusion if a reaction can occur along the diffusion path; (f) changes in the resistance to intracrystalline pl

APA, Harvard, Vancouver, ISO, and other styles

29

Tkachuk, O., Ya Matychak, I. Pohrelyuk, and V. Fedirko. "Diffusion of Nitrogen and Phase—Structural Transformations in Titanium." METALLOFIZIKA I NOVEISHIE TEKHNOLOGII 36, no. 8 (2016): 1079–89. http://dx.doi.org/10.15407/mfint.36.08.1079.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Williams, Peter A. "Preface." Pure and Applied Chemistry 83, no. 5 (2011): iv. http://dx.doi.org/10.1351/pac20118305iv.

Full text

Abstract:

&lt;div&gt;The 14th International Symposium on Solubility Phenomena and Related Equilibrium Processes (ISSP-14) was held at the Montanuniversität, Leoben, Austria, on 25-30 July 2010, co-chaired by Profs. Helmut Antrekowitsch and Heinz Gamsjäger. As part of the scientific program, a workshop on chemical modeling including kinetic effects was held over several days. The Symposium attracted scientists from all continents, save South America. Speakers at the Symposium covered an astonishing range of topics concerned with solubility phenomena in their widest sense. Oral presentations spann

APA, Harvard, Vancouver, ISO, and other styles

31

Łach, Łukasz, and Dmytro Svyetlichnyy. "Development of hybrid model for modeling of diffusion phase transformation." Engineering Computations 37, no. 8 (2020): 2761–83. http://dx.doi.org/10.1108/ec-02-2019-0059.

Full text

Abstract:

Purpose Some functional properties of engineering materials, i.e. physical, mechanical and thermal ones, depend directly on the microstructure, which is a result of processes occurring in the material during the forming and thermomechanical processing. The proper microstructure can be obtained in many cases by the phase transformation. This phenomenon is one of the most important processes during hot forming and heat treatment. The purpose of this paper is to develop a new comprehensive hybrid model for modeling diffusion phase transformations. A problem has been divided into several tasks and

APA, Harvard, Vancouver, ISO, and other styles

32

Chaus, Alexander S. "Structure and Phase Transformations upon Carburisation of High-Speed Steel." Defect and Diffusion Forum 249 (January 2006): 269–74. http://dx.doi.org/10.4028/www.scientific.net/ddf.249.269.

Full text

Abstract:

Diffusion effects of alloying elements on the structure and phase transformation during thermo-chemical treatment in AISI M2 high-speed steel additionally alloyed with vanadium, titanium and niobium have been investigated. The results of metallographic, X-ray diffraction, and electron microprobe analyses of the steels after casting, annealing, hot plastic deformation, carburising, quenching and tempering are discussed. The redistribution of alloying elements between the metallic matrix and carbide phases upon high-temperature treatment due to diffusion was shown to result in the structure and

APA, Harvard, Vancouver, ISO, and other styles

33

Kurkin, A. S. "Mathematical research of the phase transformation kinetics of alloyed steel." Industrial laboratory. Diagnostics of materials 85, no. 12 (2019): 25–32. http://dx.doi.org/10.26896/1028-6861-2019-85-12-25-32.

Full text

Abstract:

Regulation of the process parameters allows obtaining the desired properties of the metal. Computer simulation of technological processes with allowance for structural and phase transformations of the metal forms the basis for the proper choice of those parameters. Methods of mathematical modeling are used to study the main diffusion and diffusion-free processes of transformations in alloyed steels during heating and cooling. A comparative analysis of the kinetic equations of phase transformations including the Kolmogorov – Avrami and Austin – Rickett equations which describe in different ways

APA, Harvard, Vancouver, ISO, and other styles

34

Łach, Łukasz, Dmytro Svyetlichnyy, and Robert Straka. "Heat flow model based on lattice Boltzmann method for modeling of heat transfer during phase transformation." International Journal of Numerical Methods for Heat & Fluid Flow 30, no. 5 (2019): 2255–71. http://dx.doi.org/10.1108/hff-11-2018-0706.

Full text

Abstract:

Purpose A fundamental principle of materials engineering is that the microstructure of a material controls the properties. The phase transformation is an important phenomenon that determines the final microstructure. Recently, many analytical and numerical methods were used for modeling of phase transformation, but some limitations can be seen in relation to the choice of the shape of growing grains, introduction of varying grain growth rate and modeling of diffusion phenomena. There are also only few comprehensive studies that combine the final microstructure with the actual conditions of its

APA, Harvard, Vancouver, ISO, and other styles

35

Chvoj, Z. "The surface collective diffusion coefficient and diffuse phase transformations." Journal of Statistical Mechanics: Theory and Experiment 2008, no. 08 (2008): P08002. http://dx.doi.org/10.1088/1742-5468/2008/08/p08002.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Stark, Andreas, Michael Oehring, Florian Pyczak, Thomas Lippmann, Lars Lottermoser та Andreas Schreyer. "The Transformation Mechanism of β Phase to ω-Related Phases in Nb-Rich γ-TiAl Alloys Studied by In Situ High-Energy X-Ray Diffraction". Materials Science Forum 772 (листопад 2013): 85–89. http://dx.doi.org/10.4028/www.scientific.net/msf.772.85.

Full text

Abstract:

In recent years intermetallic γ-TiAl based alloys with additional amounts of the ternary bcc β Ti(Al,Nb) phase attracted increasing attention due to their improved workability at elevated temperatures. Depending on alloy composition and heat treatment the ductile high-temperature β phase can transform to several ordered phases at lower temperatures. However, currently available phase diagrams of these multiphase alloys are quite uncertain and the precipitation kinetics of some metastable phases is far from understood. In the present study various transformation pathways of the third phase were

APA, Harvard, Vancouver, ISO, and other styles

37

Zhao, K., Y. H. Ma, L. H. Lou та Z. Q. Hu. "Directional Coarsening of γ′ Phase Induced by Phase Transformation Stress". Journal of Materials Research 20, № 9 (2005): 2314–21. http://dx.doi.org/10.1557/jmr.2005.0309.

Full text

Abstract:

It was found that directional coarsening was induced by phase transformation stress due to non-uniform distribution of μ phase in an experimental nickel-based superalloy. The mechanism based on the existing diffusion and coherency strain energy theory has been discussed. It was concluded that directional coarsening was the course of dissolving of γ′ portion with high free energy, diffusing and growing on the existed γ′ particles along a preferential direction.

APA, Harvard, Vancouver, ISO, and other styles

38

Bhadeshia, H. "Phase transformations contributing to the properties of modern steels." Bulletin of the Polish Academy of Sciences: Technical Sciences 58, no. 2 (2010): 255–65. http://dx.doi.org/10.2478/v10175-010-0024-4.

Full text

Abstract:

Phase transformations contributing to the properties of modern steelsThe role of phase transformation theory in contributing to the development of innovative steels is assessed, focusing on examples where the relationship is transparent. Virtually all of the major transformations, ranging from those which necessarily involve diffusion, to others where the change in crystal structure is achieved by a deformation, are considered.

APA, Harvard, Vancouver, ISO, and other styles

39

Baek, Eung Ryul, and Ghozali Suprobo. "Massive Phase Transformation as a New Prospective on Microstructural Design in a Titanium Alloy - A Review." Materials Science Forum 1000 (July 2020): 428–35. http://dx.doi.org/10.4028/www.scientific.net/msf.1000.428.

Full text

Abstract:

Microstructural design is generally applied to improve the mechanical property of titanium alloy by introducing different phase transformations and thermomechanical treatments. Aside from the martensitic and diffusion transformation, the occurrence of massive transformation occurs in Ti alloy. Massive transformation is categorized as civilian phase transformation, which resulted in the change of crystal structure of an alloy with a given composition without changing the chemical composition of its initial phase. It happened when the body centered-cubic β phase changed into hexagonal closed-pac

APA, Harvard, Vancouver, ISO, and other styles

40

Hrabe, Zdenek, Sridhar Komarneni, Ladislav Pach, and Rustum Roy. "The influence of water vapor on thermal transformation of boehmite." Journal of Materials Research 7, no. 2 (1992): 444–49. http://dx.doi.org/10.1557/jmr.1992.0444.

Full text

Abstract:

Boehmite compacts and boehmite gels (seeded and unseeded) were annealed at various temperatures in nitrogen and 1 atm water vapor to determine the influence of water vapor on boehmite transformation to new phases, changes in porosity, and morphology. Water vapor was found to accelerate the phase transformations markedly compared to dry N2 treatment. The catalyzing effect of water vapor may be due to its interactions on grain surfaces and generation of fast diffusion paths, resulting in nucleation and growth of new phases. This result shows that control of the furnace atmosphere is a useful var

APA, Harvard, Vancouver, ISO, and other styles

41

Novotný, Ladislav, and Vladimír Ivančo. "Calculations of Phase Transformations in Welding Simulations." Applied Mechanics and Materials 611 (August 2014): 46–53. http://dx.doi.org/10.4028/www.scientific.net/amm.611.46.

Full text

Abstract:

In the paper the principle of welding simulation is presented and the methods of solution of phase transformation are described. The first part characterizes elementary equations of heat transient solution, boundary conditions during welding simulation (prescribing moving heat flux, convection, radiation). The methods of phase transformations’ solution are described for diffusion processes as well as diffusionless processes.

APA, Harvard, Vancouver, ISO, and other styles

42

Cahn, R. W., and W. L. Johnson. "Review: The nucleation of disorder." Journal of Materials Research 1, no. 5 (1986): 724–32. http://dx.doi.org/10.1557/jmr.1986.0724.

Full text

Abstract:

Four types of phase transformation that involve the conversion of crystalline phases into more disordered forms are reviewed: melting, disordering of superlattices, amorphization by diffusion between crystalline phases, and irradation amorphization. In the review emphasis is placed on evidence for the heterogeneous nucleation of the product phases; in this connection, the role of surfaces, antiphase domain boundaries, dislocations, vacancies, and grain boundaries is specifically discussed. All of these features have been either observed, or hypothesized, to play a role as heterogeneous nucleat

APA, Harvard, Vancouver, ISO, and other styles

43

Gyöngyösi, Szilvia, Anita Tóth, and Péter Barkóczy. "Simulation of Phase Transformations Driven by Short Range Diffusion by Cellular Automaton." Materials Science Forum 659 (September 2010): 405–10. http://dx.doi.org/10.4028/www.scientific.net/msf.659.405.

Full text

Abstract:

The same property of the phase transformations driven by short range diffusion (recrystallization, allotropic transformation, grain coarsening) is that the movements of the grain or the phase boundaries take place by atomic jumps through the boundaries. The probability (frequency) of these jumps depends on only on the energy state of the closenear neighborhood of the atoms. In the operation of cellular automata Consequently, only the closenear neighborhood of the cells is taken into account in the operation of the cellular automaton. This similarity makes applicable the cellular automaton appl

APA, Harvard, Vancouver, ISO, and other styles

44

Grigorieva, Raisa, Pascal Drillet, Jean Michel Mataigne, and Abdelkrim Redjaïmia. "Phase Transformations in the Al-Si Coating during the Austenitization Step." Solid State Phenomena 172-174 (June 2011): 784–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.172-174.784.

Full text

Abstract:

Nowadays more and more hot stamped steel sheets dedicated for the automotive body-in-white structure are pre-coated to prevent the steel surface against iron oxidation and decarburization during the austenitization step. For these applications, the coating is deposited by continuous hot-dipping the steel in an Al-Si bath. The Al-Si coating, at the delivery state, contains Al-grains, Al-Fe-Si ternary phases, Al-Fe binary phases. During the austenitization, the Al-Si coating transforms completely by inter-diffusion and solidification reactions. The mechanisms of Al-Fe-Si phase transformations at

APA, Harvard, Vancouver, ISO, and other styles

45

Bzowski, Krzysztof, Łukasz Rauch, Maciej Pietrzyk, Marcin Kwiecień, and Krzysztof Muszka. "Numerical Modeling of Phase Transformations in Dual-Phase Steels Using Level Set and SSRVE Approaches." Materials 14, no. 18 (2021): 5363. http://dx.doi.org/10.3390/ma14185363.

Full text

Abstract:

Development of a reliable model of phase transformations in steels presents significant challenges, not only metallurgical but also connected to numerical solutions and implementation. The model proposed in this paper is dedicated to austenitic transformation during heating and ferritic transformation during cooling. The goal was to find a solution which allows for the decreasing of computing time without noticeable decreasing the accuracy and reliability of the model. Proceedings to achieve this goal were twofold. Statistically Similar Representative Volume Element was used as a representatio

APA, Harvard, Vancouver, ISO, and other styles

46

Wierszyłłowski, Ignacy. "The Influence of Increased Cr Content and Austenite Grain Size on the Kinetics of Phase Transformations when Cooling Hypo-Eutectoid Steel." Defect and Diffusion Forum 258-260 (October 2006): 421–26. http://dx.doi.org/10.4028/www.scientific.net/ddf.258-260.421.

Full text

Abstract:

The paper presents the influence of the grain size and a little higher Cr content on the kinetics of austenite phase transformations during continuous cooling of hypo-eutectoid steel. The kinetics of austenite phase transformations during continuous cooling were determined by means of analysis of the dilatometric curves and structure investigations. The influence of the austenite grain size and the higher Cr content was analysed in two hypoeutectoid steels containing about 0.4% C. One of them had, Cr content higher, by about 1%. In both steels, the austenite grain size was changing insignifica

APA, Harvard, Vancouver, ISO, and other styles

47

Li, Wei Qi, Jin Zhou, and Wei Min Gao. "Thermodynamic and Kinetic Modelling Hydrogenation of Titanium Particles and Sheets." Advanced Materials Research 264-265 (June 2011): 1764–69. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.1764.

Full text

Abstract:

Use of hydrogen as a temporary alloying element in Ti alloys is an attractive approach to improve the mechanical properties of the materials, enhance processability and thereby reduce manufacturing costs. In this paper, the hydrogen diffusion process and the phase transformation both between Ti particles and in Ti sheets were simulated to analyze the mechanism of hydrogen diffusion in different phases (α-Ti, β-Ti and TiHx). With the simulation based on the kinetics and thermodynamics, quantitative behaviors of the hydrogen diffusion and the phase transformation were analyzed. The simulation re

APA, Harvard, Vancouver, ISO, and other styles

48

Legros, Corinne, Claude Carry, Sylvie Lartigue-Korinek, and Paul Bowen. "Phase Transformation and Densification of Nanostructured Alumina. Effect of Seeding and Doping." Defect and Diffusion Forum 237-240 (April 2005): 665–70. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.665.

Full text

Abstract:

By following the densification kinetics of nanocrystalline g alumina and corresponding microstructural evolution we showed that the diffusive transformation gamma-alpha involves several processes such as nucleation of alpha phase, rearrangement of gamma crystallite at alpha seed and grain surfaces, formation of porous alpha alumina monocrystalline colonies. Results concerning the effects of seeding and doping elements on the transformation-densification behaviour of the same g-alumina raw powder batch are also presented. Doping elements seem to have no influence on nucleation rate but could mo

APA, Harvard, Vancouver, ISO, and other styles

49

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.

Full text

Abstract:

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

APA, Harvard, Vancouver, ISO, and other styles

50

Vasilev, A. N. "A Model of Gas Diffusion in a Metal Plate with Phase Transformation." Ukrainian Journal of Physics 64, no. 4 (2019): 348. http://dx.doi.org/10.15407/ujpe64.4.348.

Full text

Abstract:

A model of gas diffusion in a metal plate has been proposed, in which a phase transformation “metal–gassed metal” takes place, when the gas concentration exceeds a certain critical value, and the properties of the system change qualitatively. The phase transformation is modeled by changing the coefficient of gas diffusion. In particular, a system of two phases with different diffusion coefficients and a moving interface between them is considered. The gas concentrations in both phases at the interface are assumed to be the known constants. An analytical solution is obtained in the approximatio

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!