Competitive deformation induced by TCP precipitation and creep inconsistency on dendritic structures in a nickel-based single crystal superalloy crept at high temperatures

Xia, Wanshun; Zhao, Xinbao; Yue, Quanzhao; Wang, Xuan; Pan, Qinghai; Wang, Jiangwei; Ding, Qingqing; Bei, Hongbin; Zhang, Ze

doi:10.1016/j.matchar.2022.111855

Cited by 18 publications

(6 citation statements)

References 71 publications

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“…The findings indicated the potential suitability of the Fe 2 Nb-type Laves phase as an effective reinforcement agent for the ferritic matrix. Xia et al [21] explored the creep behavior of a fourth-generation nickel-based single crystal alloy (Ni-SX) at temperatures of 1150 °C and 1100 °C. The study revealed that at 1150 °C, the alloy demonstrated a significantly higher nucleation rate of TCP phases, whereas at 1100 °C, the nucleation of TCP phases was limited.…”

Section: Introductionmentioning

confidence: 99%

Atomic-scale study of linear reciprocating friction of TCP/γ phase in nickel-based single crystal alloy

Chen,

Sun,

Feng

et al. 2023

Phys. Scr.

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In order to systematically investigate the role of TCP (topologically close-packed) phases in the fretting wear process of nickel-based single crystal alloys (NBSC), this study employed molecular dynamics to conduct comparative analyses of mechanical properties, atomic displacements, wear depth, defects, dislocation density, and the influence of temperature under constant load on the friction process in material wear. The research revealed that during the repetitive friction process, the friction force exhibited a peak at the extreme positions of reciprocating friction on the workpieces, and this peak increased with the number of friction cycles. The dislocation density in the worn area increased, resulting in hardening, and the removal rate of material decreased. At the initial stages of friction, the presence of interfaces notably hindered the transfer of temperature, defects, and atomic displacements in the workpiece, and this inhibitory effect weakened with an increasing number of friction cycles. The TCP phases experienced stratification due to the overall deformation they underwent. Furthermore, as the relaxation temperature increased, the workpiece exhibited enhanced plastic deformation capacity, an increase in dislocation density, and adhesion between abrasive particles and the grinding ball occurred.

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Section: Introductionmentioning

confidence: 99%

Atomic-scale study of linear reciprocating friction of TCP/γ phase in nickel-based single crystal alloy

Chen,

Sun,

Feng

et al. 2023

Phys. Scr.

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“…Re atoms, which have the lowest diffusion coefficient in Ni-based superalloys, slow down diffusion-controlled processes in the microstructure, therefore increasing its stability during exposure to high temperatures [ 4 , 9 ]. It has been shown that Re atoms enrich gamma dendrites in multicomponent Ni alloys [ 7 , 10 , 11 , 12 , 13 , 14 ], leading to a non-homogeneous distribution of elements between dendritic and interdendritic regions. Moreover, Re leads to the formation of TCP phases, which are harmful to high-temperature properties [ 4 , 5 , 11 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…It has been shown that Re atoms enrich gamma dendrites in multicomponent Ni alloys [ 7 , 10 , 11 , 12 , 13 , 14 ], leading to a non-homogeneous distribution of elements between dendritic and interdendritic regions. Moreover, Re leads to the formation of TCP phases, which are harmful to high-temperature properties [ 4 , 5 , 11 , 15 , 16 ]. Although Re’s tendency toward microsegregation [ 7 , 10 , 11 , 12 , 13 , 14 ] and crystal lattice occupying sites [ 17 ] is well established, a quantitative analysis of Re’s interactions in multicomponent Ni-based superalloys requires a more thorough examination.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, Re leads to the formation of TCP phases, which are harmful to high-temperature properties [ 4 , 5 , 11 , 15 , 16 ]. Although Re’s tendency toward microsegregation [ 7 , 10 , 11 , 12 , 13 , 14 ] and crystal lattice occupying sites [ 17 ] is well established, a quantitative analysis of Re’s interactions in multicomponent Ni-based superalloys requires a more thorough examination.…”

Section: Introductionmentioning

confidence: 99%

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Effect of the Addition of Re on the Microstructure and Phase Composition of Haynes 282: Ab Initio Modelling and Experimental Investigation of Additively Manufactured Specimens

et al. 2023

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Interactions in a multicomponent Ni-Cr-Mo-Al-Re model alloy were determined by ab initio calculations in order to investigate the Re doping effect on Haynes 282 alloys. Simulation results provided an understanding of short-range interactions in the alloy and successfully predicted the formation of a Cr and Re-rich phase. The Haynes 282 + 3 wt% Re alloy was manufactured using the additive manufacturing direct metal laser sintering (DMLS) technique, in which the presence of the (Cr17Re6)C6 carbide was confirmed by an XRD study. The results provide useful information about the interactions between Ni, Cr, Mo, Al, and Re as a function of temperature. The designed five-element model can lead to a better understanding of phenomena that occur during the manufacture or heat treatment of modern, complex, multicomponent Ni-based superalloys.

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“…Therefore, to guarantee the creep performance of SC superalloys, it is necessary to investigate the evolution of the TCP phase, as well as its influence on the deformation behavior. TCP phases are extensively studied in traditional Ni-based single crystal superalloys, such as the morphology of the TCP phase [18], the orientation relationships between TCP phases and matrix [19], and the effect of time and temperature on the TCP precipitation [20]. In recent years, single crystal superalloys with high Al and Mo contents draw more researchers' attention.…”

Section: Introductionmentioning

confidence: 99%

Topologically Closed Packed Phase and Its Interaction with Dislocation Movement in Ni–Based Superalloy during High–Temperature Creep

Guo

Zhao

et al. 2022

Crystals

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In superalloys, topologically close–packed (TCP) phases, which contain refractory elements, usually significantly influence the mechanical properties. The current work investigates the structure and composition of the TCP phase in an Al–Mo–rich Ni–based single crystal superalloy. It is shown that after 40 h of thermal exposure, a large number of strip–like TCP phases are formed, which are enriched in Mo and Re. The structure of the TCP phase is identified as the tetragonal σ phase with the lattice parameter a being 0.93 nm and c being 0.50 nm. During the creep process, the single crystal tilts obviously and leads to orientation variation from <1 1 0> direction. Two groups of dislocations are observed in the deformed sample. One group contains straight dislocation lines and another group contains dislocation networks. The interaction between TCP phase and dislocation in the single crystal superalloy is studied to reveal the effect of the TCP phase on the deformation behavior. During creep, the σ phase hinders the dislocation movement, which may contribute to the propagation of the cracks and the final fracture.

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Competitive deformation induced by TCP precipitation and creep inconsistency on dendritic structures in a nickel-based single crystal superalloy crept at high temperatures

Cited by 18 publications

References 71 publications

Atomic-scale study of linear reciprocating friction of TCP/γ phase in nickel-based single crystal alloy

Atomic-scale study of linear reciprocating friction of TCP/γ phase in nickel-based single crystal alloy

Effect of the Addition of Re on the Microstructure and Phase Composition of Haynes 282: Ab Initio Modelling and Experimental Investigation of Additively Manufactured Specimens

Topologically Closed Packed Phase and Its Interaction with Dislocation Movement in Ni–Based Superalloy during High–Temperature Creep

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