Microstructure and stress-rupture life of high W-content cast Ni-based superalloy after 1000–1100 °C thermal exposures

Zhou, Tongming; Ding, Hongsheng; Ma, Xiuping; Feng, Wei; Zhao, H.; Meng, Yi; Zhang, Huaxia; Lv, Yongmin

doi:10.1016/j.msea.2018.04.037

Cited by 18 publications

(2 citation statements)

References 35 publications

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“…Nickel-based superalloy with high tungsten (W) content has excellent oxidation resistance and mechanical properties [1][2][3][4][5]. Tungsten has prominent solid solution strengthening effect on nickel-based superalloys and the price of tungsten is much lower than other precious metals, such as Re and Ru.…”

Section: Introductionmentioning

confidence: 99%

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Chen

Xie

Shu

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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The effect of long-term thermal exposure on the tensile behavior of a high W content nickel-based superalloy K416B was investigated. The microstructure and the deformation characteristics were observed by scanning electron microscopy and transmission electron microscopy, and the phase transformation of the alloy during long-term thermal exposure was analyzed by X-ray diffraction patterns and differential thermal analysis. Results showed that after thermal exposure at 1000 °C, the MC carbides in the K416B alloy decomposed into M 6 C. During tensile deformation, dislocations slipping in γ matrix crossed over the M 6 C by Orowan bowing mechanism. With the increase of thermal exposure time, the secondary M 6 C reduced greatly the yield strength of the alloy at room temperature. Meanwhile, the continuous distribution of the secondary M 6 C with great brittleness in the grain boundary could become the main source of crack, which might change the fracture characteristic of the alloy from trans-granular to intergranular.

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Section: Introductionmentioning

confidence: 99%

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Chen

Xie

Shu

et al. 2020

Acta Metall. Sin. (Engl. Lett.)

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“…However, the application of the nickel-based superalloys containing Re and Ru is limited, mainly due to the prices of these two elements being much more expensive than the others. The element W, by contrast, has a lower price and could well improve the high temperature properties of the alloy [8,9] , which is thought to be an ideal alloying element to some extent to replace Re and Ru [10] . W mainly distributes in γ matrix Abstract: K416B Ni-based superalloy with high W content has good high temperature properties and low cost, which has a great development potential.…”

mentioning

confidence: 99%

Room temperature tensile deformation behavior of a Ni-based superalloy with high W content

et al. 2021

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Due to their good oxidation resistance, high heatresistant capability and good mechanical properties, Ni-based superalloys have been widely used for preparing the parts of aero-engine, such as turbine guide-vane, turbine disks and other bearing parts [1][2][3] . The microstructure of the Ni-based superalloy mainly consists of γ matrix, γ' phase and carbides [4][5][6] . To increase the solid solution strengthening level of the alloy, alloying elements with high melting points, such as W, Re, Ru, and so on, are commonly added during composition designs [7] . However, the application of the nickel-based superalloys containing Re and Ru is limited, mainly due to the prices of these two elements being much more expensive than the others. The element W, by contrast, has a lower price and could well improve the high temperature properties of the alloy [8,9] , which is thought to be an ideal alloying element to some extent to replace Re and Ru [10] . W mainly distributes in γ matrix Abstract: K416B Ni-based superalloy with high W content has good high temperature properties and low cost, which has a great development potential. To investigate the room temperature tensile property and the deformation feature of K416B superalloy, tensile testing at room temperature was carried out, and optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used to analyze the deformation and damage mechanisms. Results show that the main room temperature tensile deformation features of the K416B nickel-based superalloy are dislocations slipping in the matrix and shearing into γ' phase. The <110> super-dislocations shearing into γ' phase can form the anti-phase boundary two coupled (a/2)<110> partial-dislocations or decompose into the configuration of two (a/3)<112> partial dislocations plus stacking fault. In the later stage of tensile testing, the slip-lines with different orientations are activated in the grain, causing the stress concentration in the regions of block carbide or the porosity, and cracks initiate and propagate along these regions.

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On the Optimization of the Microstructural and Mechanical Properties of Model Ni-Based Superalloys Through the Alloying Effects of Refractory Mo and W Elements

Eriş

Akdeniz

Mekhrabov

2022

Metall Mater Trans A

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Microstructure and stress-rupture life of high W-content cast Ni-based superalloy after 1000–1100 °C thermal exposures

Cited by 18 publications

References 35 publications

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Room temperature tensile deformation behavior of a Ni-based superalloy with high W content

On the Optimization of the Microstructural and Mechanical Properties of Model Ni-Based Superalloys Through the Alloying Effects of Refractory Mo and W Elements

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Microstructure and stress-rupture life of high W-content cast Ni-based superalloy after 1000–1100 °C thermal exposures

Cited by 18 publications

References 35 publications

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Effect of Long-Term Thermal Exposures on Tensile Behaviors of K416B Nickel-Based Superalloy

Room temperature tensile deformation behavior of a Ni-based superalloy with high W content

On the Optimization of the Microstructural and Mechanical Properties of Model Ni-Based Superalloys Through the Alloying Effects of Refractory Mo and W Elements

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Microstructure and stress-rupture life of high W-content cast Ni-based superalloy after 1000–1100 °C thermal exposures