Influence of Scanning Speed on the Microstructure and Wear Resistance of Laser Alloying Coatings on Ti-6Al-4V Substrate

Yu, Huijun; Meng, Xiaoxi; Wang, Zifan; Chen, Chuanzhong

doi:10.3390/ma15175819

Cited by 5 publications

(5 citation statements)

References 36 publications

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“…Figure 2 shows the phase compositions and microstructure morphology of the coating with nano-Nd 2 O 3 addition. The phases in the coating mainly include TiC, γ-Ni, NiTi and NiTi 2 phases, differing only in the relative content with normal coating in our previous work, seen in Figure 2 a [ 32 ]. With nano-Nd 2 O 3 addition, the intensity of the TiC diffraction peak was improved, indicating that more TiC formed in the coating with nano-Nd 2 O 3 addition.…”

Section: Resultsmentioning

confidence: 94%

“…Figure 2 d shows the typical microstructures of the coating, which is mainly composed of TiC dendrites with Ni-Ti eutectic structures [ 32 ]. TiC dendrites account for approximately 59.2% of the total microstructure, as measured by the area method.…”

Section: Resultsmentioning

confidence: 99%

“…The thickness of the pre-paved coating is controlled to 1 mm. A certain amount of nano-Nd 2 O 3 (1.5 wt.%) was added to the powder to compare with normal G@Ni laser alloying coating [ 32 ] and to explore its influence on the microstructure and high-temperature oxidation properties of the coating.…”

Section: Methodsmentioning

confidence: 99%

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Effect of Nano Nd2O3 on the Microstructure and High-Temperature Resistance of G@Ni Laser Alloying Coatings on Ti-6Al-4V Alloy

Wang

Meng

Zhao³

et al. 2023

Nanomaterials

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Titanium and its alloys are widely used in high-end manufacturing fields. However, their low high-temperature oxidation resistance has limited their further application. Recently, laser alloying processing has attracted researchers to improve the surface properties of Ti, for which Ni coated graphite system is an excellent prospect due to its outstanding properties and metallurgical bonding between coating and substrate. In this paper, nanoscaled rare earth oxide Nd2O3 addition was added to Ni coated graphite laser alloying materials to research its influence on the microstructure and high-temperature oxidation resistance of the coating. The results proved that nano-Nd2O3 has an outstanding effect on refining coating microstructures, thus the high-temperature oxidation resistance was improved. Furthermore, with the addition of 1. 5 wt.% nano-Nd2O3, more NiO formed in the oxide film, which effectively strengthened the protective effect of the film. After 100 h of 800 °C oxidation, the oxidation weight gain per unit area of the normal coating was 14.571 mg/cm2, while that of the coating with nano-Nd2O3 addition was 6.244 mg/cm2, further proving that the addition of nano-Nd2O3 substantially improved the high-temperature oxidation properties of the coating.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

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Effect of Nano Nd2O3 on the Microstructure and High-Temperature Resistance of G@Ni Laser Alloying Coatings on Ti-6Al-4V Alloy

Wang

Meng

Zhao³

et al. 2023

Nanomaterials

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“…The fine martensitic laths are metastable in nature, and the columnar gain subsequent boundaries are the previous grains formed during solidification. The microstructure of the Ti6Al4V alloy developed using the process of additive manufacturing demonstrated the presence of a refined equiaxed grain structure, characterised by a consistent dispersion of both α and β phases throughout the material (13) . The rate of cooling is the main factor in microstructure development.…”

Section: Microstructural Analysismentioning

confidence: 99%

Evaluation of Micro Hardness and Wear Characteristics of Gyroid Designed Ti-6Al-4V Fabricated Through DMLS Technique

Devaraj,

Srinivasan

2024

IJST

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Objectives: To investigate the Micro Hardness, Micro structures and wear characteristics of the TPMS (Triply Periodic Minimal Surface) Gyroid structures with optimized porosity percentage for Bio medical application. Methods: Micro Hardness tester is used to find the micro hardness of the as cast Ti-6AL-4V and Gyroid Ti-6Al-4V Sample. Wear tests using pin-on-disc tribometer was used to assess the Gyroid Ti-6Al-4V wear samples for various loads and sliding velocity. The wear test parameters were test as load of 10, 30 & 50 N, with the sliding velocity of 0.5, 1.0 7 1.5 m/s. Atomic force microscope has been used for finding the surface roughness of the as cast and Gyroid Ti-6Al-4V samples before and after wear test. Findings: According to the test results. It is found that Gyroid Ti-6Al-4V samples posses more wear resistance than as cast Ti-6Al-4V. The micro hardness test results depicted clearly that, the Gyroid Ti-6Al-4V alloy posses' micro hardness of 408 HV in comparison with as cast Ti-6Al-4V alloys' hardness of 358 HV. The morphological characteristics of the worn-out samples were investigated using scanning electron microscope. At higher sliding conditions occurrence of large friction events lead to higher wear rates and the periodic localised fracture of transfer layer. At low sliding conditions, the Gyroid Ti-6Al-4V samples experienced ploughing, peeling off, plastic deformation types of wear mechanism. Novelty: The wear modes were categorised by the Fuzzy C-means algorithm, and a novel PNN tool in MATLAB created a wear map mechanism suitable for the Gyroid Ti alloy. The research conducted in this paper demonstrates a novel methodology for investigating wear mapping using a Probabilistic Neural Network on wear samples with a Gyroid lattice structure.

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“…Regardless of the production process, it is crucial to optimize the process parameters to achieve the best performance [14,15]. In the LC process, high-energy laser beam radiation is used to melt cladding materials and deposit them on the substrate.…”

Section: Influence Of Lc Process Parametersmentioning

confidence: 99%

Corrosion of Laser Cladding High-Entropy Alloy Coatings: A Review

et al. 2022

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Material corrosion is a common phenomenon. Severe corrosion not only causes material failure, but may also lead to unexpected catastrophic accidents. Therefore, reducing the loss caused by corrosion has become a problem faced by countries around the world. As a surface modification technology, laser cladding (LC) can be used to prepare coatings that can achieve metallurgical bonding with the substrate. High-entropy alloys (HEAs) are a new material with superior anti-corrosion ability. Therefore, HEA coatings prepared by LC have become a research hotspot to improve the anti-corrosive ability of material surfaces. In this work, the effects of LC process parameters, post-processing, and the HEA material system on the anti-corrosion ability of HEA coatings and their mechanisms are reviewed. Among them, the LC process parameters influence the anti-corrosion ability by affecting the macroscopic quality, dilution rate, and uniformity of the coatings. The post-processing enhances the anti-corrosion ability of the coatings by improving the internal defects and refining the grain structure. The anti-corrosion ability of the coatings can be improved by appropriately adding transition metal elements such as Ni, Cr, Co, and rare earth elements such as Ce and Y. However, the lattice distortion, diversification of phase composition, and uneven distribution caused by excess elements will weaken the corrosion protection of the coatings. We reviewed the impact of corrosion medium on the anti-corrosion ability of coatings, in which the temperature and pH value of the corrosion medium affect the quality of the passive film on the surface of the coatings, thereby affecting the anti-corrosion ability of the coatings. Finally, to provide references for future research, the development trend of preparing HEA coatings by LC technology is prospected.

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Influence of Scanning Speed on the Microstructure and Wear Resistance of Laser Alloying Coatings on Ti-6Al-4V Substrate

Cited by 5 publications

References 36 publications

Effect of Nano Nd2O3 on the Microstructure and High-Temperature Resistance of G@Ni Laser Alloying Coatings on Ti-6Al-4V Alloy

Effect of Nano Nd2O3 on the Microstructure and High-Temperature Resistance of G@Ni Laser Alloying Coatings on Ti-6Al-4V Alloy

Evaluation of Micro Hardness and Wear Characteristics of Gyroid Designed Ti-6Al-4V Fabricated Through DMLS Technique

Corrosion of Laser Cladding High-Entropy Alloy Coatings: A Review

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