Interdiffusion in L12-Ni3Al Alloyed with Re

Garimella, N.; Ode, Machiko; Ikeda, Mayumi; Murakami, Hideyuki; Sohn, Yong Ho

doi:10.1007/s11669-009-9499-9

Cited by 18 publications

(7 citation statements)

References 61 publications

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“…2, for the diffusion couples listed in Table 1. The average effective interdiffusion coefficients reported in Table 2 are similar in magnitude and relatively consistent with the ternary interdiffusion coefficients, binary interdiffusion coefficients and tracer interdiffusion coefficients reported in earlier studies [1][2][3]…”

Section: Average Effective Interdiffusion Coefficientssupporting

confidence: 87%

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Garimella

Choi

Sohn

2010

DDF

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Diffusion in L12-Ni3Al with ternary alloying additions of Ir, Ta and Re was investigated at 1200°C using solid-to-solid diffusion couples, and examined with respect to site preference in ordered intermetallic compound. In addition to determination of average ternary interdiffusion coefficients [1-3], average effective interdiffusion coefficients were determined directly from the experimental concentration profiles. Ni has the largest magnitude of average effective interdiffusion coefficient, followed by Al, Ir, Re and Ta. The average effective interdiffusion coefficients for Ir, Re and Ta are much smaller than those for Ni and Al. Tracer diffusion coefficients determined by extrapolation technique, and available literature also followed the same trend. The relative tendency of Ni, Al, Ir, Re and Ta to occupy the -Ni and -Al sites are correlated to these diffusion coefficients, with due consideration for diffusion mechanisms and coordination of atoms.

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Section: Average Effective Interdiffusion Coefficientssupporting

confidence: 87%

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Garimella

Choi

Sohn

2010

DDF

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“…Many experiments were undertaken to understand the mechanical properties, [6][7][8][9] as well as the locations and diffusion of Ta, [10][11][12] W, [13,14] and Re [15,16] in superalloys. Ta and Re atoms prefer to substitute Al sites in γ phase, while W atoms show no preference and can appear in both γ and Al sites in γ phases.…”

Section: Introductionmentioning

confidence: 99%

Spin and spin–orbit coupling effects in nickel-based superalloys: A first-principles study on Ni₃Al doped with Ta/W/Re

Liu¹,

Cao²,

Guo³

et al. 2022

Chinese Phys. B

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Heavy elements (X = Ta/W/Re) play an important role in the performance of superalloys, which enhance the strength, anti-oxidation, creep resistance, and anti-corrosiveness of alloy materials in a high-temperature environment. In the present research, the heavy element doping effects in FCC-Ni (γ) and Ni3Al (γ') systems are investigated in terms of their thermodynamic and mechanical properties, as well as electronic structures. The lattice constant, bulk modulus, elastic constant, and dopant formation energy in non-spin, spin polarized, and spin-orbit coupling (SOC) calculations are compared. The results show that the SOC effects are important in accurate electronic structure calculations for alloys with heavy elements. We find that including spin for both γ and γ' phases is necessary and sufficient for most cases, but the dopant formation energy is sensitive to different spin effects, for instance, in the absence of SOC, even spin-polarized calculations give 1% to 9% variance in the dopant formation energy in our model. Electronic structures calculations indicate that spin polarization causes a split in the metal d states, and SOC introduces a variance in the spin-up and spin-down states of the d states of heavy metals and reduces the magnetic moment of the system.

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“…Presently, there exist a large number of experimental works on self-diffusion and solute diffusion in model Ni 3 Al intermetallic compound measured in a wide temperature range. [12][13][14][15][16][17][18][19][20][21] Some of these data sets were studied using tracer techniques. [12][13][14] Unfortunately, direct experimental measurements on the Al self-diffusion in Ni 3 Al suffer from the lack of a suitable radiotracer Al.…”

Section: Introductionmentioning

confidence: 99%

First-principles study of solute diffusion in Ni ₃ Al

Liu

Wang

2017

Chinese Phys. B

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Using first-principles calculations in combination with Wagner-Schottky and kinetic Monte Carlo methods, the diffusion behaviors of solutes via various vacancy-mediated diffusion mechanisms in L1 2 γ -Ni 3 Al were investigated. The formation energies of the point defects and the migration energies for solutes were calculated. Adding alloying elements can decrease the defect-formation energies of Ni Al , increase the defect-formation energies of Al Ni , and have little effect on the formation energy of V Ni . The migration energies of solutes are related with the site preference and the diffusion mechanism. The diffusion coefficients of Ni, Al, and solutes were calculated, and the concentration of antisite defects plays a crucial role in the elemental diffusion.

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Interdiffusion in L12-Ni3Al Alloyed with Re

Cited by 18 publications

References 61 publications

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Spin and spin–orbit coupling effects in nickel-based superalloys: A first-principles study on Ni₃Al doped with Ta/W/Re

First-principles study of solute diffusion in Ni ₃ Al

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Interdiffusion in L12-Ni3Al Alloyed with Re

Cited by 18 publications

References 61 publications

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Site Preference and Diffusion in Ni<sub>3</sub>Al Alloyed with Ir, Ta or Re at 1200°C

Spin and spin–orbit coupling effects in nickel-based superalloys: A first-principles study on Ni3Al doped with Ta/W/Re

First-principles study of solute diffusion in Ni 3 Al

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Spin and spin–orbit coupling effects in nickel-based superalloys: A first-principles study on Ni₃Al doped with Ta/W/Re

First-principles study of solute diffusion in Ni ₃ Al