Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel

Liu, Jingda; Guan, Yang; Xia, Xuechen; Peng, Pai; Ding, Qifeng; Liu, Xiaotao

doi:10.3390/cryst10040320

Cited by 11 publications

(3 citation statements)

References 30 publications

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“…With the addition of Y 2 O 3 in the coatings, Y 2 O 3 acts as the core of heterogeneous nucleation when the molten pool solidifies, thus increasing the number of nucleation and refining the grains. Jingda Liu et al [20] also found that the addition of Y 2 O 3 can increase the nucleation rate and refine the coating structure when laser cladding a high-entropy alloy coating on the surface of H13 steel. In the central microstructure of the A100-Y 2 O 3 cladding coating, there are columnar grains and coarse equiaxed grains.…”

Section: Phase Composition and Microstructure Of A100-y2o3 Cladding C...mentioning

confidence: 99%

Study on Microstructure and Mechanical Properties of A100-Y2O3 Coatings on Low-Carbon Steel by Laser Cladding

Zhou,

Han,

Zhu

et al. 2023

Coatings

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To enhance the microhardness and wear resistance of low-carbon steel, laser cladding was employed to create A100-Y2O3 cladding coatings that remained free of cracks. The phase composition, microstructure, and element distribution of these coatings were examined using XRD and SEM analyses, respectively. The microhardness and wear resistance of the A100-Y2O3 cladding coatings were tested by an HXS-1000 A type digital liquid crystal intelligent microhardness tester and an ML-10 friction and wear tester, respectively. The XRD results show that the addition of Y2O3 did not change the phase composition of the A100-Y2O3 cladding coatings. With the addition of Y2O3, the grains of the A100-Y2O3 cladding coatings are finer compared with those of the A100-0%Y2O3 cladding coating. The upper part of the A100-Y2O3 cladding coatings were composed of fine equiaxed grains. The average microhardness of the A100-0%Y2O3 cladding coatings was 532.489 HV. With the addition of Y2O3, the microhardness of the A100-Y2O3 cladding coatings was obviously improved, and the average microhardness of A100-1.5%Y2O3 coating reached 617.290 HV. The A100-Y2O3 cladding coatings were reduced, and the worn surface became relatively smooth owing to the addition of Y2O3. The addition of Y2O3 significantly improved the wear resistance of the A100-Y2O3 cladding coatings.

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Section: Phase Composition and Microstructure Of A100-y2o3 Cladding C...mentioning

confidence: 99%

Study on Microstructure and Mechanical Properties of A100-Y2O3 Coatings on Low-Carbon Steel by Laser Cladding

Zhou,

Han,

Zhu

et al. 2023

Coatings

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“…However, the laser cladding layer may contain defects such as cracks and porosity due to the rapid cooling rate and limited application temperature range [8,9]. Studies have shown that when cracks or pores appear in the cladding layer, corrosive media can penetrate the coating through these cracks or pores, leading to a significant decrease in its corrosion resistance [10,11]. Sealing these pores can reduce defects developing in connected pores and improve the corrosion resistance [12,13].…”

Section: Introductionmentioning

confidence: 99%

Coupling Effect of Disconnected Pores and Grain Morphology on the Corrosion Tolerance of Laser-Clad 316L Coating

Zhang,

Dong,

Han

et al. 2023

Coatings

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The corrosion resistance of 316L cladding layers was addressed via the electrochemical test, to illustrate the coupling effect of the disconnected pores and grain morphology on the corrosion tolerance of 316L cladding layers. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and electrochemical testing were employed to characterize the microstructure, elemental distribution, phase composition, and corrosion resistance of the cladding layers. The results indicate that the disconnected porosity in the surface of the cladding layer decreased from 0.79% to 0.48% and the grain morphology underwent a transformation from equiaxed crystals to columnar and lath crystals, with the increasing scanning speed. The primary phase in the cladding layer was γ-Fe. Under the dual effect of a low disconnected porosity and grain morphology, the corrosion potential of the cladding layer became more electropositive from −568 mVSCE to −307 mVSCE, and the corrosion current density reduced from 4.664 μA∙cm−2 to 1.645 μA∙cm−2. The pitting potential improved from 0.005 VSCE to 0.575 VSCE as the scanning speed increased. Thus, the non-connected pores in the 316L cladding layer also affected the corrosion resistance, especially the pitting resistance. The corrosion resistance of the cladding layer can be significantly enhanced via the control of the disconnected pores and grain morphology.

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“…Owing to their high entropy, sluggish diffusion and lattice distortion effects in their multi-principal nature and dynamics [1,2], high-entropy alloys (HEAs) more easily form simple solid solution phases, including those with face-centered cubic (FCC) structures and body-centered cubic (BCC) structures, rather than complicated intermetallic compounds [3]. As a relatively new group of alloys, HEAs usually contain more than five components, and each constituent is in a near molar ratio but no larger than 35% [4].…”

Section: Introductionmentioning

confidence: 99%

Effects of Annealing on the Microstructure and Wear Resistance of Laser Cladding CrFeMoNbTiW High-Entropy Alloy Coating

Shen

Zhao

et al. 2021

Crystals

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In this study, a CrFeMoNbTiW high-entropy alloy (HEA) coating was prepared on a Q245R steel (American grade: SA515 Gr60) substrate by means of laser cladding. The effects of annealing temperature on the microstructure and wear resistance of the CrFeMoNbTiW coating were investigated using X-ray diffraction (XRD), a scanning electron microscope (SEM), a Vickers hardness tester and a roller friction wear tester. The results showed that the coating was mainly composed of body-centered cubic (BCC) solid solution and face-centered cubic (FCC) structural (Nb,Ti)C carbides prior to annealing, exhibiting an interdendritic structure and needlelike dendritic crystal structure with average microhardness of 682 HV0.2. The coarsening of the dendrite arms increased gradually after a 10-h long annealing treatment at 800 °C, 900 °C and 1000 °C, and a small amount of Laves phase was produced. After annealing, the highest microhardness value of the as-annealed coating reached 1176 HV0.2, which represents an increase of approximately 72.5% compared to that of the as-deposit coating. The wear resistance testing results imply that this type of coating retains good wear resistance following the annealing treatment and that its wear resistance increases in proportion to the annealing temperature in a range from 800 °C to 1000 °C.

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Laser Cladding of Al0.5CoCrCuFeNiSi High Entropy Alloy Coating without and with Yttria Addition on H13 Steel

Cited by 11 publications

References 30 publications

Study on Microstructure and Mechanical Properties of A100-Y2O3 Coatings on Low-Carbon Steel by Laser Cladding

Study on Microstructure and Mechanical Properties of A100-Y2O3 Coatings on Low-Carbon Steel by Laser Cladding

Coupling Effect of Disconnected Pores and Grain Morphology on the Corrosion Tolerance of Laser-Clad 316L Coating

Effects of Annealing on the Microstructure and Wear Resistance of Laser Cladding CrFeMoNbTiW High-Entropy Alloy Coating

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