Simulation of thermophysical and physico-chemical processes occurring at coating formation in electron-beam technologies of surface modification of metallic materials

Knyazeva, A. G.; Pobol, І. L.; Гордиенко, А. И.; Демидов, В Н; Kryukova, Olga; Oleschuk, I.G.

doi:10.1016/j.physme.2007.08.010

Cited by 20 publications

(6 citation statements)

References 2 publications

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“…The result of solving the spectral problem can be a set of eigenvalues and eigenvectors of a discrete analogue of the original problem, while the smallest positive value is taken as critical. Similar problems with the study of temperature effects were considered in works (Knyazeva et al, 2007;Riedlbauer et al, 2012;Keller et al, 2013;Lurie et al, 2015;Formalev and Kolesnik, 2018;Rabinsky and Tushavina, 2019a;Rabinskiy and Tushavina, 2019b;Formalev and Kolesnik, 2019).…”

Section: Resultsmentioning

confidence: 77%

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Dobryanskiy¹,

Rabinskiy²,

Tushavina³

2019

PTQ

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Additive manufacturing technologies make it possible to manufacture any product in layers based on a 3D computer model, but this issue is understudied. Therefore, this paper considers the problem of describing the effects of buckling arising in the three-dimensional printing of products containing elements whose length significantly exceeds their thickness or the characteristic size of the cross section. The behavior of these elements, from the point of view of material mechanics, can be described using models of plates or beams. In this study, we compare the results of calculations obtained using the model of non-stationary thermal conductivity and thermos-elasticity with experimental data for a specific element of printed product in which stability loss occurs. It was concluded that, at the initial moments of time, the lowest critical impact coefficient is realized, which in turn makes it the most dangerous phenomenon. The possibility of changing print parameters and product geometry to exclude the mentioned effects has been investigated. The considered structural element may lose stability during the building process. The results of solving the spectral problem indicated that over time the value of the critical effect decreases and asymptotically tends to a fixed minimum value.

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Section: Resultsmentioning

confidence: 77%

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Dobryanskiy¹,

Rabinskiy²,

Tushavina³

2019

PTQ

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“…In the study of residual stress strain behavior, it can be used an assumption about the insignificant influence of trajectory of the heating source (laser or electronic beam) on the surface of the product (Knyazev et al, 2007…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling and Software for Determining the Static and Linkage Parameters of Growing Bodies in the Process of Nonstationary Additive Heat and Mass Transfer

Kuznetsova¹,

Rabinskiy²

2019

PTQ

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Currently, methods of three-dimensional printing of products from polymer, metal and ceramic materials are widely used. Layer-by-layer synthesis technologies make it possible to obtain high-quality products with sufficiently high mechanical characteristics close to those realized using traditional technological processes. A related problem is solved, including calculating the temperature in the product and the operation area surrounding it in a flat setting based on two different approaches. For a layer-by-layer extensible body, the unsteady heat conduction problem is stated. At each step, the height of the computational region increases due to the filling of a new layer of powder. One time step of the calculation is determined by the interval between two consecutive passes of the laser. The temperature distribution found at each step is used as the initial conditions for the calculations at the next step. The temperature field obtained as a result of solving the problem that is implemented in the product in question with a step of 1000 (after applying and melting 1000 layers) is further compared with the solution of the quasi-stationary problem for the finite dimensions product. Using the example of the simple geometry taken, it is shown that a quasi-stationary solution can provide a satisfactory estimate of the macroscopic thermal state of the growing product.

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“…Thermophysical processes manifested during brazing of materials with particle beams have been well studied [4,5]. Nevertheless, such problem is coupled [6], i.e. rapid local heating can lead to a large complex of various effects (not only heat exchange).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Thermodiffusion Influence on Formation of Transition Zones during Brazing

Chepak-Gizbrekht

2016

KEM

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The work formulates a particular problem on redistribution of an active element from brazing alloy into brazed materials with due account for thermodiffusion effect. The analysis of the solution has demonstrated that thermodiffusion can facilitate the acceleration of mass transfer from brazing alloy into brazed materials and cause the accumulation of components in the vicinity of contact boundaries.

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Simulation of thermophysical and physico-chemical processes occurring at coating formation in electron-beam technologies of surface modification of metallic materials

Cited by 20 publications

References 2 publications

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Validation of Methodology for Modeling Effects of Loss of Stability in Thin-Walled Parts Manufactured Using SLM Technology

Numerical Modeling and Software for Determining the Static and Linkage Parameters of Growing Bodies in the Process of Nonstationary Additive Heat and Mass Transfer

Estimation of Thermodiffusion Influence on Formation of Transition Zones during Brazing

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