Effects of intermediate temperature on the grain boundary and γ' precipitates of nickel-based powder superalloy under interrupted cooling

Feng, Qingshuai; Wu, You; Li, Jikang; Cai, Yong; Zhang, Yuanyuan; Liu, Jiantao; Liu, Tong

doi:10.1016/j.jallcom.2022.166310

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…The phases present in the microstructure of the alloy are the highly alloyed solid solution matrix G; Ni-Ti-Al compounds; G', precipitated after the structural hardening treatment; and the Cr, Co, and Mo carbides precipitated in the grain boundary [9][10][11][12][13][14]. The SEM-EDS analyses highlighted the distribution of the G' phase in the form of small particles in the grain boundary and in the form of large intragranular particles.…”

Section: Discussion Of Resultsmentioning

confidence: 99%

“…The structure of the alloy shows a γ austenitic type, a solid solution matrix, with a fcc network. The superior hardening of this alloy is induced by aging, through the secondary precipitation at the grain boundary of the γ solid solution, rich in Cr, Co, and Mo, of the intermetallic compounds that form between Ni, Al, and Ti of the Ni x Al y or Ni x (Al Ti) y type, called the γ' phase [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Cyclic Thermal Shocks at High Temperatures on the Microstructure, Hardness and Thermal Diffusivity of the Rene 41 Alloy

Ungureanu Arva,

Negrea,

Galatanu

et al. 2024

Materials

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The precipitation-hardenable nickel-based superalloy Rene 41 exhibits remarkable mechanical characteristics and high corrosion resistance at high temperatures, properties that allow it to be used in high-end applications. This research paper presents findings on the influence of thermal shocks on its microstructure, hardness, and thermal diffusivity at temperatures between 700 and 1000 °C. Solar energy was used for cyclic thermal shock tests. The samples were characterized using microhardness measurements, optical microscopic analysis, scanning electron microscopy coupled with EDS elemental chemical analysis, X-ray diffraction, and flash thermal diffusivity measurements. Structural transformations and the variation of properties were observed with an increase in the number of shocks applied at the same temperature and with temperature variation for the same number of thermal shocks.

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