Nonlinear surface wave measurements on aged and laser shock surface-treated Inconel 718 superalloy

With excellent properties, high-temperature superalloys have become the main application materials for aircraft engines, gas turbines, and many other devices. However, superalloys are typically difficult to machine, especially for the thread cutting. In this article, an ultrasonic vibration–assisted turning system is proposed for thread cutting operations in superalloys. A theoretical analysis of ultrasonic vibration–assisted thread cutting is carried out. An ultrasonic vibration–assisted system was integrated into a standard lathe to demonstrate thread turning in Inconel 718 superalloy. The influence of ultrasonic vibration–assisted machining on workpiece surface quality, chip shape, and tool wear was analyzed. The relationship between machining parameters and ultrasonic vibration–assisted processing performance was also explored. By analyzing the motion relationship between tool path and workpiece surface, the reasons for improved workpiece surface quality by ultrasonic vibration–assisted machining were explained.

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Influence of Thermally Assisted Machining Parameters on the Machinability of Inconel 718 Superalloy

Silicon ◽

10.1007/s12633-017-9568-3 ◽

2017 ◽

Vol 9 (6) ◽

pp. 867-877 ◽

Cited By ~ 4

Author(s):

G Venkatesh ◽

D Chakradhar

Keyword(s):

Inconel 718 ◽

Machining Parameters ◽

Inconel 718 Superalloy

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Effect on microstructural and mechanical properties of Inconel 718 superalloy fabricated by selective laser melting with rescanning by low energy density

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2020.12.053 ◽

2021 ◽

Vol 10 ◽

pp. 785-796

Author(s):

Jung Hyun Park ◽

Gyung Bae Bang ◽

Kee-Ahn Lee ◽

Yong Son ◽

Won Rae Kim ◽

...

Keyword(s):

Mechanical Properties ◽

Energy Density ◽

Selective Laser Melting ◽

Inconel 718 ◽

Low Energy ◽

Laser Melting ◽

Inconel 718 Superalloy

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Influence of grain inhomogeneity and precipitates on the stress rupture properties of Inconel 718 superalloy fabricated by selective laser melting

Materials Science and Engineering A ◽

10.1016/j.msea.2020.140702 ◽

2021 ◽

Vol 803 ◽

pp. 140702

Author(s):

Shuya Zhang ◽

Xin Lin ◽

Lilin Wang ◽

Xiaobin Yu ◽

Haiou Yang ◽

...

Keyword(s):

Selective Laser Melting ◽

Inconel 718 ◽

Stress Rupture ◽

Laser Melting ◽

Stress Rupture Properties ◽

Inconel 718 Superalloy ◽

Rupture Properties

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Microstructure and Corrosion Properties of La2Zr2O7/NiCoAlY Thermal Barrier Coatings Deposited on Inconel 718 Superalloy by Laser Cladding

Coatings ◽

10.3390/coatings11010101 ◽

2021 ◽

Vol 11 (1) ◽

pp. 101

Author(s):

Kaijin Huang ◽

Wei Li ◽

Kai Pan ◽

Xin Lin ◽

Aihua Wang

Keyword(s):

Corrosion Resistance ◽

Thermal Barrier Coating ◽

Laser Cladding ◽

Inconel 718 ◽

Electrochemical Techniques ◽

Thermal Barrier ◽

Nacl Solution ◽

Corrosion Performance ◽

Barrier Coating ◽

Inconel 718 Superalloy

In order to improve the seawater corrosion resistance of Inconel 718 superalloy, a La2Zr2O7/NiCoCrAlY thermal barrier coating corrosion resistant to 3.5 wt.% NaCl aqueous solution was prepared by laser cladding on Inconel 718 superalloy. X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and electrochemical techniques were used to study the microstructure and the corrosion performance of the coating in 3.5 wt.% NaCl solution. The results show that the thermal barrier coating is mainly composed of primary La2Zr2O7 phase and γ + laves/δ phase eutectic structure. The corrosion potential and corrosion current of the coating in 3.5 wt.% NaCl solution are higher and lower than that of the Inconel 718 substrate, respectively, indicating that the corrosion performance of the coating is better than that of the Inconel 718 substrate. The presence of La2Zr2O7 phase in the thermal barrier coating is the main reason for its corrosion resistance to 3.5 wt.% NaCl solution.

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