Synthesis of composite coatings using rapid laser sintering of metallic powder mixtures

Krivilyov, M. D.; Kharanzhevskii, E. V.; Лебедев, Владимир; Danilov, Denis; Danilova, Ekaterina V.; Galenko, Peter

doi:10.1134/s0031918x13080073

Cited by 17 publications

(3 citation statements)

References 49 publications

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“…The heating and cooling rates are of the order of and correspondingly. These values are in close agreement with our previous analysis 64 . The difference in one order of magnitude between and results in fast overheating of the surface layer where thermal conduction to the substrate is not sufficient for heat removal.…”

Section: Macroscopic Simulation Of Thermal and Deformation Loadssupporting

confidence: 94%

Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Иванов

Дуб

Karabutov

et al. 2021

Sci Rep

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A new mechanism for controlling the microstructure of products in manufacturing processes based on selective laser melting is proposed. The mechanism relies on generation of high-intensity ultrasonic waves in the melt pool by complex intensity-modulated laser irradiation. The experimental study and numerical modeling suggest that this control mechanism is technically feasible and can be effectively integrated into the design of modern selective laser melting machines.

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Section: Macroscopic Simulation Of Thermal and Deformation Loadssupporting

confidence: 94%

Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Иванов

Дуб

Karabutov

et al. 2021

Sci Rep

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“…At the stage of cooling, the solidification front moves with a velocity of up to 2 m/s. These data were obtained by computer simulations of the processes of heat and mass transfer following the procedure reported in [18]. The short duration of laser pulses gives rise to an effect of overheating in a local zone near the powder/substrate interface up to the temperature of 3500C, which far exceeds the melting point of boron-based ceramic powders (the melting point of BN is 2973C [19]).…”

Section: Resultsmentioning

confidence: 99%

Application of some inhibitors for improving the corrosion resistance of ceramic coatings deposited on non-alloy steel by short-pulse laser treatment

2020

Int. J. Corros. Scale Inhib.

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Short-pulse laser treatment was used to deposit boron carbide and nitride-based ceramic coatings on a non-alloy steel surface. The coatings thus obtained show promising properties in terms of high hardness, wear resistance, adhesion to the substrate, and low coefficient of friction. In parallel, the coatings obtained were characterized by reduced corrosion resistance in a model borate buffer solution and under conditions of recurrent water vapor condensation in a thermal humidity chamber. Preliminary treatment of samples with solutions of some inhibitors made it possible to reduce anodic currents substantially in potentiodynamic experiments. The addition of benzotriazole, mercaptobenzothiazole, and potassium dichromate proved to be effective. Electrochemical and atmospheric corrosion tests revealed that preliminary exposure of the samples to solutions of the inhibitors indicated above made it possible to reduce the corrosion rate significantly compared to the untreated samples. Potassium dichromate occurred to be most effective.

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“…However, the temperature field plays a critical role in solidification process, dominating the microstructure and mechanical properties of laser sintered structures. Therefore, numerical simulation has been widely employed to study the temperature field distribute [8,9], recently. Herein, based on the commercial FEA software, the finite element models of laser sintering Ni-Gr nanocomposites were explored.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of temperature field distribution for laser sintering graphene reinforced nickel matrix nanocomposites

Saei

Guo-quan

et al. 2016

Journal of Alloys and Compounds

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Transient temperature field distribution is important for quality control of laser sintering graphene (Gr) reinforced nickel matrix (Ni-Gr) nanocomposites and the optimization of sintering parameters. To date, it is difficult to measure the temperature field directly. Thus, numerical simulation was utilized to study the distribution and evolution of temperature field. Finite element models were employed to simulate the sintering process of Ni-Gr coatings on AISI 4140 steel. The temperature distribution, the depth of the melting pool, the width of metallurgical bonding and the parameter optimizing method for laser sintering were investigated. In order to verify simulation results, single-track experiments were performed with the same laser sintering parameters as simulation. Simulated results reveal that convection and radiation heat transfer, and the latent heat of phase transition play a major role in the sintering process. Simulation output is consistent with experiments under the same processing parameters. Based on simulation results, substrate melting depth, metallurgical bonding width and thermal accumulation effects can be predicted. Thus, according to these guidelines, the optimal laser sintering parameters can be decided.

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Synthesis of composite coatings using rapid laser sintering of metallic powder mixtures

Cited by 17 publications

References 49 publications

Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Effect of laser-induced ultrasound treatment on material structure in laser surface treatment for selective laser melting applications

Application of some inhibitors for improving the corrosion resistance of ceramic coatings deposited on non-alloy steel by short-pulse laser treatment

Numerical simulation of temperature field distribution for laser sintering graphene reinforced nickel matrix nanocomposites

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