Yield strength prediction in Ni-base alloy 718Plus based on thermo-kinetic precipitation simulation

Ahmadi, Mohammad Reza; Povoden-Karadeniz, Erwin; Whitmore, Lawrence; Stockinger, Martin; Falahati, Ahmad; Kozeschnik, Ernst

doi:10.1016/j.msea.2014.04.054

Cited by 84 publications

(25 citation statements)

References 28 publications

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“…Besides, according to Ref. [1], it shows that when the second phase precipitated from the matrix, the contribution of solid solution strengthening decreased approximately to 20 MPa due to consumption of the strengthening elements. Therefore, considering the influence of δ phase's precipitation on the solid solution strengthening, the reason of the decreasing yield strength when the rolling reduction is larger than 50% are grain refinement, precipitation of δ phase, disappear of texture and work hardening.…”

Section: Strength Variation After Solid Solutionmentioning

confidence: 95%

“…GH4169 alloy is a nickel base superalloy (modified IN718) strengthened by the precipitation of ordered body centered cubic (BCC) γ"-Ni 3 Nb and ordered face centered cubic (FCC) γ 1 -Ni 3 (Al, Ti) [1,2]. It is extensively used in aerospace, nuclear, and petrochemical industries because of its excellent mechanical properties, good oxidation resistance, and corrosion at elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Zhang

Cheng

et al. 2015

Metals

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Abstract:The mechanical properties of GH4169 alloy sheet after cold rolling (at 0%, 10%, 30%, 50% and 70%) and solid solution were investigated. The textures and Taylor factors were characterized using electron backscattering diffraction (EBSD). The fractions of δ phase were measured by X-ray diffraction. The contributions of δ phase, grain size, texture, and work hardening on the mechanical properties were also discussed. The results showed increases in the yield strength (YS) (0.2%) as well as the ultimate tensile strength (UTS) of GH4169 superalloy sheet after cold rolling, when rolling reduction was increased. In contrast, following solid solution treatment, YS and UTS were increased then subsequently decreased. The changes of yield strength of GH4169 superalloy were attributed to the texture and work hardening, followed by the grain refinement and precipitation of δ phase. When the rolling reduction was below 30%, the influence of δ phase was greater than grain refinement and when the rolling reduction was larger than 50%, the controversial results occur. The precipitation of δ phase promoted the improvement of yield strength, the relationship between the fraction of δ phase and improved yield strength satisfactory fit to the following equation: σ δ = 15.9W δ + 59.7.

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Section: Strength Variation After Solid Solutionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Zhang

Cheng

et al. 2015

Metals

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“…Except for the precipitation hardening stress, the contributions from the other mechanisms can be approximated using the chemical composition of the matrix phase, the grain diameter, d γ , and the initial dislocation density in the γ phase, ρ γ 0 , [2,57,60,72,73,82]:…”

Section: Yield Stressmentioning

confidence: 99%

“…where μ γ is the shear modulus (2). b is the magnitude of the Burger's vector which is l γ / √ 2 [19].…”

Section: Yield Stressmentioning

confidence: 99%

“…14a were proposed by Mishima et al which were obtained by the regression analyses of the compressive 0.2% flow stresses of the binary Ni alloys with 0 to 0.08 Al or 0 to 0.08 Cr at 77 K [60]. Although the temperature effect on solid solution strengthening is not included, this model has been successfully applied in different composition and temperature domains [2,9,49].…”

Section: Yield Stressmentioning

confidence: 99%

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A Computational Framework for Material Design

Kattner

Campbell

2017

Integr Mater Manuf Innov

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A computational framework is proposed that enables the integration of experimental and computational data, a variety of user-selected models, and a computer algorithm to direct a design optimization. To demonstrate this framework, a sample design of a ternary Ni-Al-Cr alloy with a high work-to-necking ratio is presented. This design example illustrates how CALPHAD phase-based, composition and temperature-dependent phase equilibria calculations and precipitation models are coupled with models for elastic and plastic deformation to calculate the stress-strain curves. A genetic algorithm then directs the search within a specific set of composition and processing constraints for the ideal composition and processing profile to optimize the mechanical properties. The initial demonstration of the framework provides a potential solution to initiate the material design process in a large space of composition and processing conditions. This framework can also be used in similar material systems or adapted for other material classes.Keywords Ni-based superalloy · Integrated computational materials engineering · Genetic algorithm · Material design

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From Melt Pool to Strength ‐ Application of ICME Methods for the Development of Rapid Manufacturing Technologies

Maiwald-Immer¹,

Göhler²,

Fischersworring‐Bunk³

2015

Proceedings of the 3rd World Congress on Integrated Computational Materials Engineering (ICME 2015)

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Yield strength prediction in Ni-base alloy 718Plus based on thermo-kinetic precipitation simulation

Cited by 84 publications

References 28 publications

Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

Effect of Cold Rolling and Heat Treatment on the Mechanical Properties of GH4169 Alloy Sheet at Room Temperature

A Computational Framework for Material Design

From Melt Pool to Strength ‐ Application of ICME Methods for the Development of Rapid Manufacturing Technologies

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