Effect Factors of Internal Stress and Deformation Mechanism for Single Crystal Nickel-Base Superalloys during Creep

Yu, Xing Fu; Tian, Su Gui; Wang, Ming Gang; Du, Hong Qiang; Meng, Fan Lai; Hu, Ziyang

doi:10.4028/www.scientific.net/msf.539-543.2972

Cited by 1 publication

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“…In order to reduce the number of plane-wave basis vectors, the ultra-soft pseudo-potential (USPP) scheme [29] was used to describe the interaction potential between the real ion and the valence electrons. As shown in Figure 1a,b, the Ni-based single crystal consists of two phases, namely singlecrystal Ni as the matrix phase (γ-phase) and Ni 3 Al (γ'-phase) as the strengthening phase, both of which exhibit the face-centered-cubic structure [30]. For the γ-phase, the kinetic energy cutoff value is 440 eV, and the number of k-point sampling grids is 12 × 12 × 12; for the γ'-phase, the kinetic energy cutoff value is 400 eV, and the number of k-point sampling grids is 8 × 8 × 8.…”

Section: First-principles Calculation Of Ni-based Alloys and Insulati...mentioning

confidence: 99%

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

et al. 2022

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In this study, thin-film thermocouples (TFTCs) were combined with a smart bolt to design a smart bolt that can directly test high temperature in service monitoring and parameter calculation for gas turbine structure design. The first-principles calculation was used to analyze the design of the surface properties of nickel-based alloys and insulating layers, and finite element analysis was used to optimize dimension parameters by controlling the thermal stress matching of insulating layers and sensitive layers. The effect of the glass powder with different particle sizes on the microstructure of the ITO and In2O3 films was studied via SEM. The preferred particle size of the additive glass powder is 400 nm. The XRD pattern shows the (222) peak has the highest intensity. The intensities of the (222) and (622) peaks increase after the heat treatment. The calibration results show that the average Seebeck coefficient of the TFTCs can reach 64.9 μV/°C at 1100 °C with a maximum voltage of 71.4 mV. The repeatability error of the cycles of the sensor after heat treatment is ±1.05%. The repeatability of the sensor is up to 98.95%. The smart bolts were tested for application in small aero engines. It can be seen that under the impact of 1000 °C, the thermal response of the prepared smart bolt is better than that of the K-type armored thermocouple, and the thermal balance is achieved faster. The intelligent bolt sensor proposed in this work has better engineering application prospects owing to its convenience of installation in harsh environments.

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Section: First-principles Calculation Of Ni-based Alloys and Insulati...mentioning

confidence: 99%

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

et al. 2022

View full text Add to dashboard Cite

show abstract

Effect Factors of Internal Stress and Deformation Mechanism for Single Crystal Nickel-Base Superalloys during Creep

Cited by 1 publication

References 4 publications

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

High-Temperature-Sensing Smart Bolt Based on Indium Tin Oxide/In2O3 Thin-Film Thermocouples with Nickel-Based Single-Crystal Superalloy via Screen Printing

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