Physico-chemical and mathematical modeling of phase interaction taking place during fusion welding processes

Zinigrad, Michael; Mazurovsky, V.; Borodianskiy, Konstantin

doi:10.1002/mawe.200500925

Cited by 6 publications

(7 citation statements)

References 7 publications

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“…The multifraction packing density model was used for the selection of the space holder volume fractions and the ratio of fractions [ 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. Packing density models may be divided into geometric, structural elemental scheme, and computer simulation types based on a discrete elemental analysis.…”

Section: Theoretical Principlesmentioning

confidence: 99%

Design and Fabrication of Highly Porous Replicated Aluminum Foam Using Double-Granular Space Holder

Finkelstein

Husnullin²,

Borodianskiy

2021

Materials

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Porous materials are widely employed in a wide variety of industrial applications due to their advanced functional performance. Porous aluminum is among the most attractive metallic materials. It can be produced using repeatable methods involving a replicated Al foam that also provides porosity control. In this work, a highly porous replicated Al foam was fabricated. First, the model of multifunctional packing density was used and corrected to select the appropriate space holders. Then, Al foam was produced using a double-granular sodium chloride space holder. The obtained results showed a maximum porosity of 65% that was achieved using a mix of coarse, irregular granules with spherical granules of intermediate size.

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Section: Theoretical Principlesmentioning

confidence: 99%

Design and Fabrication of Highly Porous Replicated Aluminum Foam Using Double-Granular Space Holder

Finkelstein

Husnullin²,

Borodianskiy

2021

Materials

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“…There are some works where models were developed to predict the chemical composition [1,2] and the structure [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] of the required deposit metal during high temperature processes, such as welding, joining, and build-up processes. These complicated models include the physical and chemical parameters of solid, liquid and gas phases, phase transition parameters, hydrodynamics' parameters, etc.…”

Section: State Of the Artmentioning

confidence: 99%

“…Important results were obtained from the studies of the physical and chemical parameters of high temperature processes, such as welding or casting, and development of kinetic model of alloy transfer. By determining the chemical composition of the weld metal researchers have developed the kinetic model [3][4][5][6][7][8][9]. Based on this model, the authors described the transfer of alloying elements between the slag, which is the residue left on a weld from the flux consists mostly of mixed metal oxides, sulfides and nitrides, and the metal during arc welding.…”

Section: State Of the Artmentioning

confidence: 99%

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Computational Methods for Creation Materials with Required Composition and Structure

Borodianskiy¹,

Zinigrad²

2013

Materials Science - Advanced Topics

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/54794 . IntroductionOne of the most important and complicated problems in modern industry is to obtaining materials with the required chemical composition, structure and mechanical and physical properties. Solving this problem involves great deal of time and expense, and the results obtained might be far from the optimal solution.The development of computer technology and its accessibility have made it possible to solve problems for which there were previously unknown solutions or these methods were so tedious that they proved to be unsuitable for practical application.There are some works where models were developed to predict the chemical composition [ , ] and the structure [ -] of the required deposit metal during high temperature processes, such as welding, joining, and build-up processes. These complicated models include the physical and chemical parameters of solid, liquid and gas phases, phase transition parameters, hydrodynamics' parameters, etc.It is also necessary to be aware of the material's phase structure, which has a significant influence on its final properties. Predicting the phase-structure composition of a metal has been the subject of numerous papers [ -] that included graphical representations of the phasestructure composition of the metal as a function of its chemical composition, as well as computational methods for determining the percentage of its phase.Such a method is poorly suited to complex systems and processes described by systems of equations. In the case of mathematical modeling, the process is studied on a mathematical model using a computer, and not on a physical object. The input parameters of the mathematical model are fed into the computer, and the computer supplies the output parameters calculated in the process. The first stage in the mathematical modeling of physicochemical

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“…Using this modified Schaeffler diagram and the model explained in refs 1–8, we present the work whose goal was creation of shock‐abrasion resistance build‐up metal.…”

Section: Introductionmentioning

confidence: 99%

Creation of Shock‐Abrasion Resistance Build‐up Metal Using a Physicochemical Model of High‐Temperature Processes

Borodianskiy

Mazurovsky

Zinigrad

et al. 2007

Israel Journal of Chemistry

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ABSTRACT. Build-up metal for shock-abrasion resistance was in the focus of the work, where the mathematical model of physico-chemical high temperature processes developed by the authors in their previous works was used. A computer program based on the model permitted forecasting of the required chemical composition and structure of the build-up metal.Flux-cored wires were fabricated from a cold-rolled ribbon (1008 steel) and filled with a powder mixture. Low carbon steel (A 516) was used as the base metal.The specimens were prepared by 3-layered build-up. The prepared specimens were tested using: Light Microscopy, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Analysis (EDS), Hardness Measurements and Shock-Abrasion Resistance Measuring Device.The results of the mentioned tests confirmed the correct calculation of the model and good shock-abrasion resistance of the suggested build-up metal. Introduction.Fusion welding is a very complicated process. This is multiphase system with a non uniform temperature field and complex mass and heat transfer processes which are occurring on the metal-slag and metal-gas boundaries and determine the chemical composition of the weld metal and as the result determine its structure and mechanical properties.The mechanical properties of the weld deposit are determined not only by the chemical composition of the metal, the nature of the crystallization of the weld has also a great influence on its properties.More than 50 years, Schaeffler diagram is an important tool to predict Cr-Ni austenite, austenite-ferrite or austenite-martensite weld with carbon content of up to 0.12%. Chemical composition of alloying elements is a main regulator for receiving required microstructure according to Schaeffler diagram. However, it does not allow determining the composition and volume of carbide phases. Furthermore, if carbon content in weld is over 0.12% as it is presented in this work, the forecast agreement with actual data is markedly reduced due to an intense consumption of carbon and carbideforming elements by the process of carbide formation. Firstly, it could be attributed to the fact that the carbide formation process in weld is not taken into consideration (as mentioned above), and secondly, it is caused by using constant empiric coefficients in the equations determining Cr and Ni equivalents.Schaeffler diagram was modified and presented in our previous works [1][2], to provide a more accurate prediction of weld structure as follows: -taking into consideration of the carbide formation process;

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Physico-chemical and mathematical modeling of phase interaction taking place during fusion welding processes

Cited by 6 publications

References 7 publications

Design and Fabrication of Highly Porous Replicated Aluminum Foam Using Double-Granular Space Holder

Design and Fabrication of Highly Porous Replicated Aluminum Foam Using Double-Granular Space Holder

Computational Methods for Creation Materials with Required Composition and Structure

Creation of Shock‐Abrasion Resistance Build‐up Metal Using a Physicochemical Model of High‐Temperature Processes

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