Dynamic compressive behavior of a single crystal nickel-base superalloy at ultra-high temperature: mechanism investigation with a modified electric synchronous SHPB technique

Li, Penghui; Yuan, Kai; Guo, Weiguo; Wang, Ruifeng; Chen, Longyang; Gao, Meng; Du, Peng

doi:10.1016/j.jmrt.2022.02.121

Cited by 9 publications

(2 citation statements)

References 51 publications

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“…The Hopkinson bar has been widely used to obtain dynamic material properties for various materials such as metals [17,18], concretes [19] and composites [20,21]. It can be also modified to measure dynamic behavior in ultra-high [22] or ultra-low temperatures [23]. Recently, there have been efforts to apply peridynamic modeling in SHPB analysis to achieve more accurate simulation results [24,25].…”

Section: Introductionmentioning

confidence: 99%

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Kim,

Park,

Kim

2023

Metals

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The split Hopkinson pressure bar (SHPB) is a machine used for obtaining dynamic material properties at high strain rates of 102–104 s−1. In the SHPB test, the material properties obtained vary depending on the shape of the specimen. In other words, it is important to understand the behavior of the specimen when selecting the specimen dimensions. However, specific standards, such as the size of specimens and bars for the SHPB, have not yet been established. This study investigates the effect of changing the specimen diameter on strain and stress results. Comparison and verification with experimental results were performed using the LS-DYNA program. Specimens are cylindrical titanium grade 1. The specifications of bars and length (L) of the specimens were not changed. The results revealed that the reflected ratio increased, and the transmitted ratio decreased as the area of the specimen decreased. The ratios of these strains are affected by impedance (Z=ρAC). The area reduction of specimens under the same conditions made it possible to obtain dynamic properties at a higher strain rate. It was shown that the impedance relationship and strain rate can be altered by varying the diameter of the specimen without changing the dimensions or material of the bar itself.

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Section: Introductionmentioning

confidence: 99%

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Kim,

Park,

Kim

2023

Metals

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“…Therefore, high-speed aircraft's non-ablative thermal protection materials must have excellent mechanical properties, high physical and chemical stability, and very low ablation rate at high temperatures. The materials expected to meet the requirements of thermal protection structural materials for high-temperature resistance mainly include superalloys [4], C/C composites [5], and ultra-high-temperature ceramics [6]. Although superalloys are relatively easy to process and have good thermal shock resistance, metal materials usually have high density and severe creep and oxidation behavior at high temperatures [7].…”

Section: Introductionmentioning

confidence: 99%

Efficient fabrication of light C _f/SiHfBOC composites with excellent thermal shock resistance and ultra-high-temperature ablation up to 1800 °C

Lyu,

Han,

Zhao

et al. 2023

Journal of Advanced Ceramics

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In this paper, a high-yield Hf-modified SiHfBOC ceramic precursor was developed, and a high-pressure assisted impregnation pyrolysis method was proposed to achieve the preparation of 3D PyC-C f /SiHfBOC composites. This high-pressure assisted impregnation method significantly improves impregnation filling effect of the precursor in and between fiber bundles compared to dozens of traditional impregnation cycles. After undergoing just 9 precursor infiltration pyrolysis (PIP) cycles, the composites achieved relative density of approximately 90% and density of 1.64 g/cm 3 . The critical temperature difference of the 3D PyC-C f /SiHfBOC composites after the shock of room temperature (RT)-1000 ℃ is as high as 650 ℃, which is twice that of traditional ceramic materials, showing good thermal shock resistance. Under the effect of Hf modification, a dense HfO 2 -SiO 2 oxide layer (thickness of 93 μm) was formed in situ on the surface of the 3D PyC-C f /SiHfBOC composites, effectively preventing further erosion of the composite matrix by high-temperature oxidation gas. Even in the ultra-high-temperature oxygen-containing environment at 1800 ℃, it still exhibits an excellent non-ablative result (with a linear ablation rate of 0.83×10 −4 mm/s). This work not only enriches the basic research on lightweight ultra-high-temperature ceramic composites converted from Hf ceramic precursors, but also provides strong technical support for their applications in ultra-high-temperature non-ablative thermal protection materials for high-speed aircraft.

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Study on the Dynamic Instantaneous Precipitation of ZK60-T4 Magnesium Alloy Under High Strain-Rate Loading

Yang,

Zhan,

et al. 2024

JOM

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Dynamic compressive behavior of a single crystal nickel-base superalloy at ultra-high temperature: mechanism investigation with a modified electric synchronous SHPB technique

Cited by 9 publications

References 51 publications

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Efficient fabrication of light C _f/SiHfBOC composites with excellent thermal shock resistance and ultra-high-temperature ablation up to 1800 °C

Study on the Dynamic Instantaneous Precipitation of ZK60-T4 Magnesium Alloy Under High Strain-Rate Loading

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Dynamic compressive behavior of a single crystal nickel-base superalloy at ultra-high temperature: mechanism investigation with a modified electric synchronous SHPB technique

Cited by 9 publications

References 51 publications

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Influence of Specimen Diameter for Titanium Grade 1 on SHPB Tests and Its Verification Using FEM

Efficient fabrication of light C f/SiHfBOC composites with excellent thermal shock resistance and ultra-high-temperature ablation up to 1800 °C

Study on the Dynamic Instantaneous Precipitation of ZK60-T4 Magnesium Alloy Under High Strain-Rate Loading

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Efficient fabrication of light C _f/SiHfBOC composites with excellent thermal shock resistance and ultra-high-temperature ablation up to 1800 °C