Solidification characteristics and as-cast microstructures of a Ru-containing nickel-based single crystal superalloy

Cao, Kaili; Yang, Wenchao; Zhang, Jiachen; Liu, Chen; Qu, Pengfei; Su, Haijun; Zhang, Jun; Liu, Lin

doi:10.1016/j.jmrt.2021.01.043

Cited by 29 publications

(8 citation statements)

References 42 publications

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“…On other occasion, Vinosha et al, (2021) investigated nickel substitution in cobalt ferrite nanoparticles to enhance magneto-optical, electrical, and acoustical properties. Furthermore, the study of nickelbased superalloys were reported for many applications using various mechanical and heat treatments to yield acceptable limit material performance (Cao et al, 2021;Ding et al, 2020;Gudivada and Pandey, 2023).…”

Section: Introductionmentioning

confidence: 99%

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Dahani,

Sundari,

Nugraheni

et al. 2024

ijcsrr

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Indonesia is a country rich in laterite mining especially in Celebes island and northern Moluccas. Laterite is a mineral rich with precious nickel. Nitric acid leaching has been used for nickel extraction from laterite under the influence of nitric acid concentration (2.0 M, 4.0 M, and 6.0 M) and leaching temperature (65oC, 70oC, and 75oC) during 60 min. at 300 rpm. The preliminary study aims to apply multiple linear regression (MLR) method to examine the dominant effect between acid concentration and leaching temperature on nickel extraction, and also Pearson correlation to study significant correlation between the variables involved (acid concentration, leaching temperature, and nickel concentration). The method and results is related to acid leaching at varied temperature set up as predictors and nickel concentration as dependent variable in the MLR equation using the enter method. The MLR method showed that acid concentration gave significant effect on nickel concentration, however, the leaching temperature showed no significant effect on nickel extraction at t ≤ 0.05. The Pearson correlation showed acid concentration correlated significantly with nickel concentration. The Kolmogrov-Smirnov (K-S) test showed normality for distribution of nickel concentration. The acid leaching method is potential for nickel extraction from laterite using extensive range of acid concentrations and leaching temperatures to improve nickel extraction.

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Section: Introductionmentioning

confidence: 99%

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Dahani,

Sundari,

Nugraheni

et al. 2024

ijcsrr

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“…The solidification of the SC blades is starting with the development of the columnar dendrite matrix phase, i.e. γ phase, and the residual liquid is mainly solidified as the γ/γ' eutectic phase and a minor of intermetallic precipitates [3]. A study by Brewster et al [4] found that a thin layer of γ/γ' eutectics accumulated on the external surface of the casting along the solidification length.…”

Section: Introductionmentioning

confidence: 99%

Potential eutectic accumulation in single crystal turbine blade due to geometry effect: a numerical study

Zhang

Liu

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Inhomogeneous distribution of the eutectic phase in single crystal (SC) turbine blades is detrimental to its mechanical properties. In a recent publication, it was reported that an accumulation of eutectics was observed on the upper surface of solidification units (e.g. shroud of a turbine blade), whereas fewer eutectics were detected at the bottom. This kind of casting defect brings a huge challenge to the production of turbine blades since the accumulated eutectics cannot be dissolved completely by heat treatment. A sample with three pairs of platforms/shrouds was designed to study the geometry effect on eutectic accumulation. In the current study, the simulation was performed by coupling ProCAST with our previously developed multiphase volume-average solidification model. In the first step, the thermal field including radiation in the furnace and heat conductivity in the casing and mould was calculated via ProCAST. Then, the obtained temperature profiles were set as thermal boundary conditions of the casting to predict the eutectic accumulation and formation of freckles. Based on the simulation results, convective plumes arising from the thermosolutal buoyancy transport solute-enriched liquid upward, which causes the solute pile-up and the final eutectic accumulation at the top surface in each platform. Freckles accompanied with eutectic accumulation was also observed at the corner of the sample. The calculated inhomogeneous distribution of the eutectics agrees well with experimental observations. Knowledge about the geometrical effect on eutectic accumulation is extended.

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“…For example, in turbine engines, severe wear between the dovetail and slot of NBSC superalloys blades can lead to failure and compromise flight safety. Adding certain insoluble elements can enhance the creep resistance of alloy materials, such as the addition of W, Nb, and Re, among others [5][6][7][8]. Currently, there are several types of TCP phases identified in nickel-based single crystal alloys, primarily including Laves phase, σ phase, μ phase, P phase, and R phase [9][10][11][12].…”

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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Solidification characteristics and as-cast microstructures of a Ru-containing nickel-based single crystal superalloy

Cited by 29 publications

References 42 publications

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Application of MLR Method and Pearson Correlation on Nickel Extraction from Laterite Using Nitric Acid

Potential eutectic accumulation in single crystal turbine blade due to geometry effect: a numerical study

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

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