Computer simulation of phase transformation and plastic deformation in IN718 superalloy: Microstructural evolution during precipitation

Zhou, Ning; Lv, Duchao; Zhang, Hailong; McAllister, Donald; Zhang, F.; Mills, Michael J.; Wang, Y.

doi:10.1016/j.actamat.2013.10.069

Cited by 110 publications

(35 citation statements)

References 66 publications

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“…8a). The current results correspond to simulations carried out by Zhou et al [35]. Further increase in the temperature of annealing leads primarily to the growth of precipitates (Fig.…”

Section: Discussionsupporting

confidence: 89%

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy After Annealing

Maj

Adamczyk‐Cieślak

Slesik

et al. 2017

Archives of Metallurgy and Materials

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Inconel 718 is a precipitation hardenable nickel-iron based superalloy. It has exceptionally high strength and ductility compared to other metallic materials. This is due to intense precipitation of the γ' and γ" strengthening phases in the temperature range 650-850°C. The main purpose of the authors was to analyze the aging process in Inconel 718 obtained in accordance with AMS 5596, and its effect on the mechanical properties. Tensile and hardness tests were used to evaluate the mechanical properties, in the initial aging process and after reheating, as a function of temperature and time respectively in the ranges 650°-900°C and 5-480 min. In addition, to link the mechanical properties with the microstructure transmission microscopy observations were carried out in selected specimens. As a result, factors influencing the microstructure changes at various stages of strengthening were observed. The authors found that the γ'' phase nucleates mostly homogenously in the temperature range 650-750°C, causing the greatest increase in strength. On the other hand, the γ' and δ phases are formed heterogeneously at 850°C or after longer annealing in 800°C, which may weaken the material.

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“…8a). The current results correspond to simulations carried out by Zhou et al [35]. Further increase in the temperature of annealing leads primarily to the growth of precipitates (Fig.…”

Section: Discussionsupporting

confidence: 89%

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy After Annealing

Maj

Adamczyk‐Cieślak

Slesik

et al. 2017

Archives of Metallurgy and Materials

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“…Therefore, the diffusion length is adopted as half of the SDAS in this work, and the local solidification velocity is defined as Accordingly, a modified dimensionless microsegregation index (MMSI) is extended into Eq. [6] based on the MSI criterion proposed by Nastac:…”

Section: Relationship Between the Microsegregation And Laves Phasementioning

confidence: 99%

“…The segregation and Laves phase increase the hot tearing sensitivity of INCONEL718 alloy castings and harmfully influence their final properties owing to the depletion of potent solution strengthening elements for Ni-rich matrix. [5,6] Therefore, the cooling rate is one of the most important technological parameters that should be controlled during manufacturing complex thin-wall components.…”

Section: Introductionmentioning

confidence: 99%

Study of Microsegregation and Laves Phase in INCONEL718 Superalloy Regarding Cooling Rate During Solidification

Ling

Han

Zhou

et al. 2014

Metall Mater Trans A

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Cooling rate is an important and controllable variable in casting processing. The effect of cooling rate on the microsegregation and Laves phase in INCONEL718 superalloy castings was studied by high-temperature-laser confocal scanning microscopy and quantitative metallography in this study. The transformation rate of solid phase with a feature of Gaussian distribution in the solidifications at the cooling rates of 0.10 to 14 K/s is acquired. The solidification time and secondary dendrite arm spacing (SDAS) as a function of cooling rate are analyzed. The amount of Laves phase presents a maximum value at a threshold cooling rate of 3 K/s owing to the opposite effects of cooling rate on the solidification time and SDAS. A modified dimensionless microsegregation index criterion was used for the scaling of solute segregation and Laves phase depending on cooling rates. The prediction of maximal microsegregation and the amount of Laves phase by MSI and experiments provide a guide for cooling rate control in the casting applications.

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“…The origin of this effect cannot be explained by differences in the elastic moduli of matrix and precipitate, since these do not differ greatly from phase to phase. Instead, it is the fault energies associated with anti-phase boundaries (APBs) and stacking faults (SFs) which are responsible for it [4,5]. Their magnitudes severely limit the penetration of the c 0 phase achieved by the dislocations introduced during deformation, and thus bulk plastic flow.…”

Section: Introductionmentioning

confidence: 98%

Modelling of the influence of alloy composition on flow stress in high-strength nickel-based superalloys

et al. 2014

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Computer simulation of phase transformation and plastic deformation in IN718 superalloy: Microstructural evolution during precipitation

Cited by 110 publications

References 66 publications

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy After Annealing

The Precipitation Processes and Mechanical Properties of Aged Inconel 718 Alloy After Annealing

Study of Microsegregation and Laves Phase in INCONEL718 Superalloy Regarding Cooling Rate During Solidification

Modelling of the influence of alloy composition on flow stress in high-strength nickel-based superalloys

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