Microstructure and mechanical properties of parts formed by ultrasonic vibration-assisted laser cladding of Inconel 718

Zhu, Lida; Yang, Zhichao; Xin, Bo; Wang, Shuhao; Meng, Guiru; Ning, Jinsheng; Xue, Pengsheng

doi:10.1016/j.surfcoat.2021.126964

Cited by 97 publications

(31 citation statements)

References 30 publications

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Section: Resultsmentioning

confidence: 99%

“…Due to the metallurgical reaction occurring at the bottom of the layer, or to the protective Ar gas involved in the melting process, the generated or involved gas fails to be discharged in time. Therefore, pores appeared in the heat affected zone at the bottom of the layer, forming porosity defects [18,19]. The WC/Ni-composite layer was prepared on the surface of the aluminum alloy by synchronous powder-feeding in Ar (25 L/min) configured for 1.2 kw power, 4.6 mm/s scanning speed, 1.5 mm spot diameter, and 20% overlapping.…”

Section: Microstructure Of Multi-track Wc/ni Layermentioning

confidence: 99%

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Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

Zhang

2021

Materials

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The microstructural and wear properties of laser-cladding WC/Ni-based layer on Al–Si alloy were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersive spectrometer (EDS) and wear-testing. The results show that, compared with the original specimen, the microhardness and wear resistance of the cladding layer on an Al–Si alloy were remarkably improved, wherein the microhardness of the layer achieved 1100 HV and the average friction coefficient of the layer was barely 0.14. The mainly contributor to such significant improvement was the generation of a WC/Ni-composite layer of Al–Si alloy during laser cladding. Two types of carbides, identified as M7C3 and M23C6, were found in the layer. The wear rate of the layer first increased and then decreased with the increase in load; when the load was 20 N, 60 N and 80 N, the wear rate of layer was1.89 × 10−3 mm3·m−1, 3.73 × 10−3 mm3·m−1 and 2.63 × 10−3 mm3·m−1, respectively, and the average friction coefficient (0.14) was the smallest when the load was 60 N.

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Section: Resultsmentioning

confidence: 99%

Section: Microstructure Of Multi-track Wc/ni Layermentioning

confidence: 99%

Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

Zhang

2021

Materials

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“…In recent years, ultrasonic vibration technology has been applied in laser engineering net shaping of ceramic and metal parts [17][18][19] and preparation of metal-based coatings by laser cladding [20][21][22] due to its characteristics such as refining crystal grains, reducing macro/micro defects, and improving mechanical properties. Cong et al [17][18][19] proposed to use ultrasonic vibration-assisted laser net shaping to avoid the manufacturing defects of metal and ceramic parts, and found that ultrasonic vibration could reduce porosity, refine crystal grain size, and improve mechanical properties such as hardness.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of TiC/TiB Composite Ceramic Coatings In-Situ Synthesized by Ultrasonic Vibration-Assisted Laser Cladding

Chen

Deng

et al. 2022

Coatings

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Laser cladding coating has many advantages in surface modification, such as a small heat-affected zone, and good metallurgical bonding. However, some serious problems such as pores, and poor forming quality still exist in the coating. To suppress these problems, a novel process of ultrasonic vibration-assisted laser cladding process was adopted to in-situ synthesize TiC/TiB composite ceramic coating on the surface of titanium alloy. Results showed that the introduction of ultrasonic vibration effectively improved the surface topography of the coating, reduced the number of pores in the coating, refined the crystal grains of the coating, decreased the residual tensile stress in the coating, and increased the micro-hardness of the coating. The tribological properties of the coating were significantly improved by the ultrasonic vibration, the wear resistance of the coating fabricated with ultrasonic vibration at power of 400 W increased about 1.2 times compared with the coating fabricated without ultrasonic vibration, and the friction coefficient decreased by 50%.

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“…Inconel 718 is widely used as feedstock material. The tribological properties of laser-clad coatings have already been investigated by several groups [18,19]. For a corrosive and tribological load collective, adaptive solution concepts are necessary for the component surface.…”

Section: Introductionmentioning

confidence: 99%

Boriding of Laser-Clad Inconel 718 Coatings for Enhanced Wear Resistance

et al. 2021

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Nickel-based superalloys are particularly suitable for applications under corrosive conditions. Economic advantages can be achieved by limiting the use of materials to the surface region. Furthermore, the tribological property profile can be significantly improved by surface hardening. In the present study, the possibility of a process combination comprising a coating and a surface hardening technology was investigated. For this purpose, Inconel 718 coatings were applied to austenitic stainless steel by laser cladding. Subsequently, a thermochemical surface hardening by boriding was carried out. Scanning electron microscopic (SEM) examinations were performed to evaluate the microstructure. The phase composition was determined by means of X-ray diffraction (XRD) for the different states of the coating system. The influence of thermochemical hardening was investigated for different wear conditions. The increase in microhardness and wear resistance clearly demonstrates the utilization potential of the presented process combination.

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Microstructure and mechanical properties of parts formed by ultrasonic vibration-assisted laser cladding of Inconel 718

Cited by 97 publications

References 30 publications

Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

Microstructure and Wear Properties of Laser Cladding WC/Ni-Based Composite Layer on Al–Si Alloy

Microstructure and Mechanical Properties of TiC/TiB Composite Ceramic Coatings In-Situ Synthesized by Ultrasonic Vibration-Assisted Laser Cladding

Boriding of Laser-Clad Inconel 718 Coatings for Enhanced Wear Resistance

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