Investigation of powder fed laser cladding of NiCr-chromium carbides single-tracks on titanium aluminide substrate

Aghili, S. E.; Shamanian, M.

doi:10.1016/j.optlastec.2019.105652

Cited by 42 publications

(13 citation statements)

References 29 publications

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“…For both materials, the laser power influenced the height and width of the depositions (Figure 7), as reported previously by Liu et al [2], Nabhani et al [15], Aghili and Shamanian [23], El Cheikh et al…”

Section: Influence Of Laser Power On Deposition Geometrysupporting

confidence: 82%

“…Moradi et al [13], Alvarez et al [19] and Moradi et al [10] detailed the influencing of both the laser parameters and the proprieties of the addiction metal powder on the geometry of the final depositions. Therefore, it is important to define the operational window of the process, with the fusion with the substrate being controlled in order to ensure depositions with no defects and good metallurgical bonding between the substrate and the coating [2,15,19,20,23].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Figueredo

Apolinário

Santos

et al. 2021

J. of Materi Eng and Perform

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In the laser cladding process, control of the process parameters and knowledge of the characteristics of the materials used are essential for obtaining depositions with excellent metallurgical union, satisfactory dilution values, absence of defects, and acceptable geometric characteristics. Without such precautions, depositions can exhibit low or excess dilution, low wettability, and the presence of pores, consequently reducing the performance of the materials. The aim of the present work was to evaluate the effects of the laser beam power, with maximum power of 4000 W and continuous wave mode, and scanning speed in laser cladding processes employing the AISI 316L austenitic stainless steel and the AISI 431 martensitic stainless steel, considering the geometric characteristics, dilution, and structural defects of the depositions. It was found that the laser power had a greater effect on the width and dilution of the depositions, while the scanning speed influenced the deposition height. The depositions of AISI 431 steel presented dilution values between 9 and 25%, using power settings between 1400 and 1600 W. The depositions of AISI 316L steel required higher power values between 1900 and 2600 W to achieve dilution values between 15 and 41%. The existence of pores and satisfactory hardness values were observed for both materials, with the average of microhardness of 522 HV0.5/15 and 356 HV0.5/15 on the AISI 431 and AISI 316L depositions. It was also found that the different characteristics of the addition metals, considering their morphology, particle size distribution, and flow rate, led to significant changes in the geometric features of the depositions.

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Section: Influence Of Laser Power On Deposition Geometrysupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Figueredo

Apolinário

Santos

et al. 2021

J. of Materi Eng and Perform

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“…Laser cladding technology is widely used in automotive, steel, aerospace, mining machinery, petrochemical, and other fields due to its unique advantages when used in parts repair [3,4], and thin-walled parts are also commonly used in the fields of aviation, aerospace, national defense advanced technology, and ships [5]. Although it presents outstanding advantages, there remain many problems when repairing thin-walled parts via laser cladding, as it is difficult to control the process parameters [6][7][8]. When the laser power is too high, the deformation of thin-walled parts increases and the laser can easily burn through the parts; however, when the laser power is too low, a bright white band cannot be formed in the bonding area between the substrate and the alloy material, and the quality requirements of the cladding cannot be met [9].…”

Section: Introductionmentioning

confidence: 99%

Study on the Deformation Control and Microstructures of Thin-Walled Parts Repaired by Laser Cladding

Huang

2020

Coatings

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To reduce the deformation and improve the quality of thin-walled parts repaired by laser cladding, a three-factor, three-level orthogonal experimental scheme was employed to clad Ni60 powder on thin-walled parts with a thickness of 3.5 mm. To measure the deformation of the thin-walled parts, a method of combining the meshing of the backs of the thin-walled parts and fixing one end of the parts during cladding was used. The effects of the powder feed rate, laser power, and scanning speed on the deformation of the thin-walled parts were studied via visual analysis and analysis of variance, and the process parameters that resulted in the minimum deformation were determined. The deformation process of the thin-walled parts and the causes of cladding stress were also studied, and the microstructure of the cladding layer with the minimum deformation was analyzed via scanning electron microscopy (SEM). The results reveal that the deformation of the thin-walled parts increased with the increase of laser power. The increases of the scanning speed and powder feed rate were found to reduce the deformation of thin-walled parts; the laser power was found to have a significant effect, and the powder feed rate was found to have no significant effect, on the deformation of thin-walled parts. The order of the influence of factors on the deformation of thin-walled parts from greatest to least was determined to be as follows: laser power > scanning speed > powder feed rate. The optimal parameters to obtain the minimum deformation and good metallurgical bonding of thin-walled parts were found to be a powder feed rate of 1.4 r/min, a laser power of 1100 W, and a scanning speed of 8 mm/s. From the bottom to the top, the crystal structure of the coating with the minimum deformation was found to be coarse dendrite, dendritic crystal, and equiaxed crystal.

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“…Laser cladding refers to radiating high-energy-density laser beams on the surface of base material and forming a layer of materials with special physical, chemical or mechanical properties on it through rapid melting, expansion and solidi cation. In comparison with other surface machining technologies, the laser cladding technology integrates the merits of broad scope of application, strong practicability and exible application, so it has aroused extensive attention and attracted great importance and has been widely used [1][2][3][4][5][6][7][8]. At present the major problem in laser cladding is high coating brittleness and great cracking tendency [9][10][11][12][13][14][15][16], which considerably restricts its scope of application in key components, so cracking inhibition in the laser cladding is of great realistic signi cance to the application of the laser cladding technology in production.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Convex Shape Beam Spot on Stress Field of Plasma-sprayed MCrAlY Coating During Laser Cladding Process

Zhang

Chu

et al. 2021

Preprint

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In order to reduce the thermal stress at clad layer and further reduce the crack generation in the laser cladding process, a method of controlling the cracks at clad layer by changing the laser energy density was proposed. The comparative thermal-mechanical coupling finite element analysis was conducted for the uniform rectangular spot and convex shape beam spot cladding processes on plasma-sprayed MCrAlY coating through the numerical simulation method based on the ANSYS software. The results show that the rapid heating and cooling characteristics, which are typical in laser processing, are manifested in the cladding process using the uniform rectangular spot, and the convex shape spot can exert the preheating and slow cooling effects to a certain extent, so as to reduce the temperature gradient of the cladding zone and non-cladding zone. In addition, on the precondition of equivalent cladding effect, the thermal stress at the clad layer is also low, so the cracking tendency of the clad layer can be effectively mitigated. Relative to the laser beam shaped diffractive optical element special for design and manufacturing, superposing two uniform rectangular spots with different sizes and energy densities is a simpler and more effective method of acquiring the convex shape spot.

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Investigation of powder fed laser cladding of NiCr-chromium carbides single-tracks on titanium aluminide substrate

Cited by 42 publications

References 29 publications

Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Study on the Deformation Control and Microstructures of Thin-Walled Parts Repaired by Laser Cladding

Numerical Simulation of Convex Shape Beam Spot on Stress Field of Plasma-sprayed MCrAlY Coating During Laser Cladding Process

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Investigation of powder fed laser cladding of NiCr-chromium carbides single-tracks on titanium aluminide substrate

Cited by 42 publications

References 29 publications

Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Influence of Laser Beam Power and Scanning Speed on the Macrostructural Characteristics of AISI 316L and AISI 431 Stainless Steel Depositions Produced by Laser Cladding Process

Study on the Deformation Control and Microstructures of Thin-Walled Parts Repaired by Laser Cladding

Numerical Simulation of Convex Shape Beam Spot on Stress Field of Plasma-sprayed MCrAlY&nbsp;Coating During Laser Cladding Process

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Product

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Numerical Simulation of Convex Shape Beam Spot on Stress Field of Plasma-sprayed MCrAlY Coating During Laser Cladding Process