Numerical simulation EF/VOF to study the influence of the surface condition of the formation of the slats of a nickel deposit produced by plasma spraying

Tahar, Souad; Zirari, Mounir; Abdelwahab, Benzerdjeb; Hanini, Salah

doi:10.3166/acsm.42.165-180

Cited by 2 publications

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“…Except for experimental methods, many researchers adopt finite element methods to investigate the effect of laser processing on cemented carbide. The profile and depth on the surface of material under different laser parameters by finite element method, which provides basis of modified laser machining parameters such as laser energy density and wavelength for different material [8][9][10][11]. The surface remelting treatment of electrics melting WC steel composite material DGW40 and DGW50 by CO2 laser was studied.…”

Section: Introductionmentioning

confidence: 99%

Thermal Effect Analysis of Laser Processing Cemented Carbide Micro-texture

Wan¹,

Zheng²

2019

IJHT

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Laser surface microtexturing techniques can improve the friction properties of materials by reducing the contact area and form heat affected zones (HAZ) by energy conduction in laser processing. HAZ has a significant effect on the surface friction properties in the friction zone. This paper focuses on the formation of HAZ on the surface of cemented carbide during laser processing micro-texture. Firstly, the principle of energy absorption, conversion and conduction in laser processing is analyzed. Then the finite element method is used to study the distribution of temperature field and its change with time. Then the laser processing of microtexture of cemented carbide is carried out by laser marking machine. In the experiment, the characteristics of HAZ on the surface of cemented carbide after laser processing were studied by ultra-depth microscope, EDS and SEM. The effects of different laser processing parameters on the size of HAZ were studied, and the changes of element content after laser processing were studied. At the same time, the morphology of HAZ microcracks was observed and the reasons for its formation were analyzed. The results show that the laser power is the main factor affecting the HAZ size, followed by the laser scanning speed and the number of scans. The content of Co after laser processing is highest near the center of the micro-texture, and decreases from the center to the edge. The thermal stress and stress concentration caused by the temperature gradient cause microcracks to form around and inside the microtexture. By selecting reasonable laser parameters, it has an important influence on the size, element content and microcrack formation of HAZ, and it is of great significance to improve the micro-texture properties of the processed cemented carbide.

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Section: Introductionmentioning

confidence: 99%

Thermal Effect Analysis of Laser Processing Cemented Carbide Micro-texture

Wan¹,

Zheng²

2019

IJHT

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The Influence of the Fusion State of the Particles during the Simultaneous Impact on an Oxidized Substrate in the Presence of Asperities

et al. 2022

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The surface areas of the materials are generally the most vulnerable parts since they are directly exposed to different stresses such as wear, fatigue, and corrosion. On the other hand, the successive impact of the droplets finds numerous applications in additive manufacturing technologies such as 3D printing and liquid metal projection. The lamella state formed by the impact and spreading of the first particle represents the target for the second; however, its molten state or fragmented state, bouncing or a slide, interacts thermally and dynamically to allow or not allow stacking. The deposition, deformation, and solidification of the droplets are the constituent steps of the process which determine the final result, as the topography of the substrate not only conditions the mechanical adhesion of the drop to the substrate but also affects the wettability of the surfaces. The objective of this work was to model by numerical simulation the impact of successive and simultaneous droplets with solidification and simultaneous deformation in the presence of an oxide layer on the substrate, which presents different topography, in order to fix the knowledge on the behavior of the impact, the spreading, or the splashing with solidification. However, a peak diameter greater than 5% of the particle diameter causes the formation of concave roughness which directly infects the mechanical adhering and subsequently the formation of an ordinary lamella.

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Numerical simulation EF/VOF to study the influence of the surface condition of the formation of the slats of a nickel deposit produced by plasma spraying

Cited by 2 publications

References 0 publications

Thermal Effect Analysis of Laser Processing Cemented Carbide Micro-texture

Thermal Effect Analysis of Laser Processing Cemented Carbide Micro-texture

The Influence of the Fusion State of the Particles during the Simultaneous Impact on an Oxidized Substrate in the Presence of Asperities

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