Thermal fatigue behavior of K125L superalloy

Ning, Likui; Zheng, Zhi; An, Feng-Quan; Tang, Song; Jian, Tong; Ji, Hui-Si; Yu, Huiwen

doi:10.1007/s12598-014-0254-y

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…Therefore, the carbon contents were slightly adjusted to ensure an effective carbon content in these steels was approximately 0.14 wt%. [ 16 ]…”

Section: Experimental Methodologymentioning

confidence: 99%

Wettability between Titanium‐Containing Steels and TiC Ceramic Substrate

Yan,

Zhang,

Wang

et al. 2023

steel research int.

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TiC particles, known for their extremely high hardness, are commonly used in metal‐matrix composite to enhance wear resistant. Precipitating TiC particles during the solidification stage of steel proves to be an effective method for improving product properties. Herein, TiC particles are determined to precipitate during the solidification process of titanium‐containing steels (Ti>0.3 wt%) through in situ observation experiment and energy spectrum analysis. To investigate the crucial factor of wettability, which significantly affects mechanical properties, the wetting experiments between TiC substrates (15 × 15 × 2 mm) and the steel specimens (Φ3 × 3 mm) with different titanium contents (0.01, 0.31, and 0.68 wt%) are simultaneously conducted employing a modified sessile drop method, combining with an electron probe microanalyzer. The results reveal that the molten steel infiltrates into the TiC substrate along its interconnected internal pores, driven by capillary force, with elements diffusion occurring and no reaction products are found in this process. Thermodynamic calculations confirm that TiC has a higher solubility in liquid steel compared to TiN, thus validating the superior wettability of TiC–steel system over the TiN–steel system. These findings provide valuable insights for studying wettability between TiC particles and high‐titanium steel, as well as for designing high‐titanium wear‐resistant steel compositions.

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“…Therefore, the carbon contents were slightly adjusted to ensure an effective carbon content in these steels was approximately 0.14 wt%. [ 16 ]…”

Section: Experimental Methodologymentioning

confidence: 99%

Wettability between Titanium‐Containing Steels and TiC Ceramic Substrate

Yan,

Zhang,

Wang

et al. 2023

steel research int.

View full text Add to dashboard Cite

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“…When the aeroengine is starting, climbing, cruising, or stopping, the combustion chamber components of the aeroengine will produce large temperature gradient and large instantaneous thermal stress, because of the heterogeneous temperature distribution and various material properties of each components. 1,2 During the heating and cooling cycle of components, the cycle of thermal stress produced will lead to crack initiation and thermal fatigue failure, which will significantly shorten the life of combustion chamber components. 3,4 As the engine inlet temperature increased, the hightemperature performance requirements of combustion chamber components and structures are also higher and higher.…”

Section: Introductionmentioning

confidence: 99%

“…Thermal fatigue is one of the principal loads that lead to the failure of key high‐temperature structural components of aeroengines. When the aeroengine is starting, climbing, cruising, or stopping, the combustion chamber components of the aeroengine will produce large temperature gradient and large instantaneous thermal stress, because of the heterogeneous temperature distribution and various material properties of each components 1,2 . During the heating and cooling cycle of components, the cycle of thermal stress produced will lead to crack initiation and thermal fatigue failure, which will significantly shorten the life of combustion chamber components 3,4 .…”

Section: Introductionmentioning

confidence: 99%

Thermal fatigue crack initiation and propagation behaviors of GH3230 nickel‐based superalloy

Zhang,

Hou,

Jin

et al. 2023

Fatigue Fract Eng Mat Struct

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The drastic severe temperature cycle in an aero‐engine combustion chamber leads to large thermal fatigue stress, which may induce thermal fatigue failure of the combustion chamber. In this paper, thermal fatigue crack initiation and propagation behaviors of GH3230 nickel‐based superalloy sheet specimens with V‐notch were studied under different peak temperatures 800°C, 900°C, and 1,000°C using self‐built thermal fatigue equipment. The temperature, stress, and crack propagation driving force of the V‐notch specimen were discussed in detail. Results show that the thermal fatigue crack initiation life gradually decreases with the increase of the peak temperature. Oxidation caused by high temperature will weaken alloy's strength and accelerate its crack propagation. Higher peak temperature will make the crack propagate faster and the thermal deformation at V‐notch end easier to accumulate. At last, there is a good consistency between fitting curves from the modified Paris formula and the experiment results.

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