Research Status and Application of the High-Entropy and Traditional Alloys Fabricated via the Laser Cladding

Geng, Yaoxiang; Konovalov, S. V.; Chen, Xizhang

doi:10.15407/ufm.21.01.026

Cited by 40 publications

(10 citation statements)

References 61 publications

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“…Fig. 3 Principle of laser beam welding with co-axial powder nozzle feeding [26] Fig. 4 Laser beam heating geometry [21] Table 3 Process parameters for the production of test specimens (Fig.…”

Section: Methodsmentioning

confidence: 99%

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Use of Laser Metal Deposition Technology in Additive Manufacturing of Ni Powder Materials

Sejč

Jaroš

Vanko

2022

Strojnícky Časopis - Journal of Mechanical Engineering

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The process parameters of the Laser Metal Deposition technology in the production of simple components made of NiCuBSi type metal powder were verified in this paper. A laser head with a coaxial powder supply and argon gas was used in the production. The powder was welded to a S235J2G3 steel plate. The used parameters (heat input 0.25 kJ.mm−1) enabled the production of samples with a minimum porosity (1.2 %) and without the defects (cold joints, pores) between the weld layers.

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Section: Methodsmentioning

confidence: 99%

“…The thickness of the layer will be proportional to the amount of feed and molten powder material. Powder-based DED technology using a laser as an energy source is also called Laser Metal Deposition (LMD) [1,[18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Use of Laser Metal Deposition Technology in Additive Manufacturing of Ni Powder Materials

Sejč

Jaroš

Vanko

2022

Strojnícky Časopis - Journal of Mechanical Engineering

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“…The parameters like laser power, feed rate, diameter of the laser beam and scanning velocity influenced the formed cladded layer. After optimizing these parameters, the laser cladding process was performed [ 29 , 30 ]. In laser cladding, a high-power continuous laser beam from the Ytterbium-doped yttrium aluminum garnet (Yb: YAG Trumpf disk laser-4002) (Geometrix Laser Solution, Mambattu, India) was used to irradiate the surface of the 316L steel samples in an argon (shielding gas) environment.…”

Section: Methodsmentioning

confidence: 99%

Investigation on Microstructure, Nanohardness and Corrosion Response of Laser Cladded Colmonoy-6 Particles on 316L Steel Substrate

2021

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316L steel is predominantly used in manufacturing the components of high-pressure boilers, heat exchangers, aerospace engines, oil and gas refineries, etc. Its notable percentage of chromium offers resistance against corrosion and is mostly implemented in harsh environments. However, long-term exposure to these components in such environments can reduce their corrosion resistance property. Particularly at high temperatures, the oxide film formed on this type of steel reacts with the chloride, sulfides, sulfates, fluorides and forms intermetallic compounds which affect its resistance, followed by failures and losses. This work is focused on investigating the hardness, microstructure and corrosion resistance of the laser cladded Colmonoy-6 particles on the 316L steel substrate. The cladded specimens were dissected into cubic shapes and the microstructure present in the cladded region was effectively analyzed using the FESEM along with the corresponding EDS mapping. For evaluating the hardness of the cladded samples, the nanoindentation technique was performed using the TI980 TriboIndenter and the values were measured. The potentiodynamic polarization curves were plotted for both the substrate and clad samples at 0, 18, 42 and 70 h for revealing the corrosion resistance behavior. In addition, the EIS analysis was carried out to further confirm the resistance offered by the samples. The surface roughness morphology was evaluated after the corrosion process using the laser microscope, and the roughness values were measured and compared with the substrate samples. The result showed that the cladded samples experience greater hardness, lower values of surface roughness and provide better corrosion resistance when compared with substrate samples. This is due to the deposition of precipitates of chromium-rich carbide and borides that enhances the above properties and forms a stable passive film that resists corrosion during the corrosion process.

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“…There were also some black spots distributed in the coatings, which were thr micropores generated during the fabrication. The generation of micropores was mainly attributed to the interaction of laser beam, inert gas, and metal powders, the complex molten pool ow characteristics, and the change in material volume during the alloying process [33,34]. Point 1, point 2, and point 3 were selected in dark regions, grey matrix, and white features, respectively.…”

Section: Effects On Microstructure and Element Compositionmentioning

confidence: 99%

Laser-directed energy deposition of CoCrFeNiTi high entropy alloy coatings: effects of powder geometry and laser power

Zhang

et al. 2023

Int J Adv Manuf Technol

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CoCrFeNiTi high entropy alloy (HEA) has been extensively studied to serve as coating materials on complexly shaped parts of equipment used in industries such as oil, gas, and mining due to its high hardness, excellent wear resistance, and good high-temperature stability. Laser directed energy deposition has potential to fabricated HEA caotings due to its advantages of excellent metallurgical bonding, high coating density, suppressed element segregation, and the capability of thick coating deposition. However, limited investigations have been conducted on the effects of input parameters (such as powder geometry and laser power) on the mechanical properties of laser DED fabricated CoCrFeNiTi high-entropy alloy coatings. In this study, CoCrFeNiTi HEA coatings have been fabricated on Ti substrates from sphericalshaped and irregular-shaped powders under different levels of laser power. The effects of powder geometry and laser power on molten pool thermal characteristics (including temperature, cooling rate, and solidi cation time), phase constitution, microstructure, and mechanical properties of hardness and wear resistance have been investigated. Under the same laser power, the utilization of irregular-shaped powders resulted in uniform microstructures and higher hardness. For the coatings fabricated from spherical-shaped powders, the increase of laser power could improve the microhardness and wear resistance. For the coatings fabricated from spherical-shaped powders, the increase of laser power could increase the microhardness. However, the wear resistance is increased and then decreased due to the increase in friction of coe cient.

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Research Status and Application of the High-Entropy and Traditional Alloys Fabricated via the Laser Cladding

Cited by 40 publications

References 61 publications

Use of Laser Metal Deposition Technology in Additive Manufacturing of Ni Powder Materials

Use of Laser Metal Deposition Technology in Additive Manufacturing of Ni Powder Materials

Investigation on Microstructure, Nanohardness and Corrosion Response of Laser Cladded Colmonoy-6 Particles on 316L Steel Substrate

Laser-directed energy deposition of CoCrFeNiTi high entropy alloy coatings: effects of powder geometry and laser power

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