Phase Interaction in the Metal - Oxide Melts - Gas -System

Boronenkov, Vladislav; Zinigrad, Michael; Leontiev, Leopold; Pastukhov, Edward; Shalimov, Mikhail; Shanchurov, Sergey

doi:10.1007/978-3-642-22377-8

Cited by 8 publications

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“…Previous molecular‐dynamics calculations for liquid Fe‐C alloys [e.g., Sobolev and Mirzoev , ; Belashchenko et al ., ] have revealed Fe‐C, Fe‐Fe, and C‐C bond distances of approximately 2.0, 2.5, and 4.0 Å, respectively, at ambient pressure. Additionally, the relative scattering factor for carbon atoms has been estimated to be approximately 50 times lower than that of iron due to the small atomic number of carbon [ Boronenkov et al ., ]. Therefore, we considered the S ( Q ) and G ( r ) obtained in this work to relate to the Fe‐Fe bond in the liquid Fe‐C alloy.…”

Section: Resultsmentioning

confidence: 99%

“…Pressure dependencies of (a) the first S ( Q ) peak, Q 1 , and of (b) the first and (c) second G ( r ) peaks, r 1 and r 2 , respectively, for the liquid Fe‐3.5 wt % C alloy. Blue and gray symbols denote data from the present study and from previous ambient pressure study on liquid Fe‐3.7 wt % C alloy [ Boronenkov et al ., ], respectively. The unfilled square and circle symbols denote previous data for liquid Fe ( Kono et al .…”

Section: Resultsmentioning

confidence: 99%

“…Boronenkov et al . [] proposed that ordered regions in liquid Fe‐C alloys of 0.5 to 4 wt % C are interstitial solutions of carbon in iron with bcc and fcc (Fe 4 C structure) packing. The structural change in the liquid Fe‐3.5 wt % C alloy at ~5 GPa may result from transformation of this C‐poor and Fe‐rich bcc components to a fcc ‐like local order near the bcc‐fcc ‐liquid triple point as in pure liquid Fe.…”

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

“…Similar changes in r 1 and r 2 for the liquid Fe‐17 wt % Si alloy may indicate the onset of a structural transition. Furthermore, structural studies on liquid Fe‐Si alloys at ambient pressure suggest that Fe 3 Si liquids (approximately 14.4 wt % Si) may consist of Fe‐Si clusters with ordered substitutional solutions, wherein silicon replaces iron atoms in the bcc ‐Fe structure [ Boronenkov et al ., ]. The transformation of the bcc ‐like local frame similarly to pure liquid Fe may induce a structural change in the liquid Fe‐Si alloy, as in the case of the liquid Fe‐C alloy.…”

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

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Microscopic structural change in a liquid Fe‐C alloy of ~5 GPa

Shibazaki

Kono

Fei

2015

Geophysical Research Letters

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The structure of a liquid Fe‐3.5 wt % C alloy is examined for up to 7.2 GPa via multiangle energy‐dispersive X‐ray diffraction using a Paris‐Edinburgh type large‐volume press. X‐ray diffraction data show clear changes in the pressure‐dependent peak positions of structure factor and reduced pair distribution function at 5 GPa. These results suggest that the liquid Fe‐3.5 wt % C alloys change structurally at approximately 5 GPa. This finding serves as a microscopic explanation for the alloy's previously observed density change at the same pressure. The pressure dependencies of the nearest and second neighbor distances of the liquid Fe‐3.5 wt % C alloy are similar to those of liquid Fe which exhibits a structural change near the bcc‐fcc‐liquid triple point (5.2 GPa and 1991 K). Similarities between Fe‐3.5 wt % C and Fe suggest that a density change also occurs in liquid Fe and that this structural change extends to other Fe‐light element alloys.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

Section: Discussion and Geophysical Implicationsmentioning

confidence: 99%

See 2 more Smart Citations

Microscopic structural change in a liquid Fe‐C alloy of ~5 GPa

Shibazaki

Kono

Fei

2015

Geophysical Research Letters

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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%

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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Settlement and Experimental Method of Estimation of Parameters of Transition Elements in the Weld Metal During Arc Welding and Improving the Whole Charge Flux Cored Wire

2019

PNIPU Bulletin.

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Шалимов М.П., Вотинова Е.Б. Расчетно-экспериментальная методика оценки параметров перехода элементов в металл шва при дуговой сварке и совершенствования состава шихты порошковой проволоки // Вестник Пермского национального исследовательского политехнического университета. Машиностроение, материаловедение. -2019. -Т. 21, № 1. -С. 28-35. Shalimov M.P., Votinova E.B. Settlement and experimental method of estimation of parameters of transition elements in the weld metal during arc welding and improving the whole charge flux cored wire.Приводится описание методики экспериментов и результаты обработки опытных данных для оценки параметров процесса дуговой сварки порошковой проволокой с применением метода полного материального баланса. Она представляет собой систему из трех уравнений. Первое уравнение описывает взаимосвязь усредненного и парциальных коэффициентов перехода; второе -переход элемента из металлической фазы; третье -восстановление элемента из шлаковой фазы. Приведены усредненные и парциальные коэффициенты перехода элементов в наплавленный металл и металл шва. При сварке порошковой проволокой состав наплавленного металла и его сварочно-технологические свойства зависят от условий плавления ленты и шихты и взаимодействия образовавшихся фаз друг с другом и газом. Итогом этих процессов является формирование сварочной ванны определенной массы и состава. Анализ экспериментальных данных позволил выявить взаимосвязь показателей процесса (коэффициентов перехода элементов) с технологическими параметрами. Приведены полученные регрессионные уравнения. Сравнение опытных и расчетных данных показало их хорошую сходимость, что говорит о возможности применения метода полного материального баланса для оценки коэффициентов перехода элементов при дуговой сварке порошковой проволокой. Полученные данные позволяют прогнозировать состав наплавленного металла или металла шва при произвольных параметрах режима сварки порошковой проволокой, а также оценивать эффективность состава шихты. Аналогичным образом можно определить наиболее экономичный вариант состава покрытия электродов. Для этого необходимо рассчитать себестоимость компонентов покрытия для различных вариантов состава, которые дают близкий по концентрациям легирующих элементов наплавленный металл, что гарантирует необходимые эксплуатационные характеристики.Ключевые слова: дуговая сварка, порошковая проволока, коэффициент перехода элемента, расчет состава металла шва, моделирование сварочных процессов, оптимизация состава, метод полного материального баланса, прогнозирование, состав наплавленного металла, математическое моделирование.

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Phase Interaction in the Metal - Oxide Melts - Gas -System

Abstract: The use of general descriptive names, registered names, trademarks, etc. in this publication does not imply, even in the absence of a specific statement, that such names are exempt from the relevant protective laws and regulations and therefore free for general use.

Cited by 8 publications

References 0 publications

Microscopic structural change in a liquid Fe‐C alloy of ~5 GPa

Microscopic structural change in a liquid Fe‐C alloy of ~5 GPa

Computational Methods for Creation Materials with Required Composition and Structure

Settlement and Experimental Method of Estimation of Parameters of Transition Elements in the Weld Metal During Arc Welding and Improving the Whole Charge Flux Cored Wire

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