High-cycle fatigue of nickel-based superalloy ME3 at ambient and elevated temperatures: Role of grain-boundary engineering

Gao, Yu-Ji; Ritchie, Robert O.; Kumar, Mukul; Nalla, Ravi K.

doi:10.1007/s11661-005-0007-5

Cited by 129 publications

(48 citation statements)

References 33 publications

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“…When applied to Ni-based superalloys, grain boundary engineering has been shown to increase resistance to fatigue crack growth and extend the high cycle fatigue life [19,20]. When either a large grain or a cluster of grains within a polycrystalline microstructure are favorably oriented for planar slip, cyclic deformation conditions may lead to the formation of persistent slip bands that effectively serve as precursors for nucleation of fatigue cracks [21].…”

Section: Introductionmentioning

confidence: 99%

Tailoring the Properties of a Ni-Based Superalloy via Modification of the Forging Process: an ICME Approach to Fatigue Performance

Detrois

Rotella

Hardy

et al. 2017

Integr Mater Manuf Innov

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Traditionally, material design and property modifications are usually associated with compositional changes. Yet, subtle changes in the manufacturing process parameters can also have a dramatic effect on the resulting material properties. In this work, an integrated computational materials engineering (ICME) framework is adopted to tailor the fatigue performance of a Ni-based superalloy, RR1000. An existing fatigue model is used to identify microstructural features that promote enhanced fatigue life, namely a uniform, fine grain size distribution, random orientation, a distinct grain boundary distribution (specifically high twin boundary density and limited low-angle grain boundaries). A deformation mechanism map and process models for grain boundary engineering of RR1000 are used to identify the optimal thermo-mechanical processing parameters to realize these desirable microstructural features. For validation, small-scale forgings of RR1000 were produced and heat-treated to attain fine grain and coarse grain microstructures that represent the conventionally processed and grain boundary engineered (GBE) conditions, respectively. For each of the four microstructural variants of RR1000, the twin density and grain size were characterized and were in agreement with the desired microstructural attributes. In order to validate the deformation mechanisms and fatigue behavior of the material, high-resolution digital image correlation was performed to generate strain maps relative to the microstructural features. The high density of twin boundaries was confirmed to inhibit the length of slip bands, which is directly attributed to extended fatigue life. Thus, this study demonstrated the successful role of models, both process and performance, in the design and manufacture of Ni-based superalloy disk forgings.

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Section: Introductionmentioning

confidence: 99%

Tailoring the Properties of a Ni-Based Superalloy via Modification of the Forging Process: an ICME Approach to Fatigue Performance

Detrois

Rotella

Hardy

et al. 2017

Integr Mater Manuf Innov

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“…The as-received microstructure comprised a bimodal distribution of -20 nm fand 100 to 200 nm ordered (L12) precipitates within the equiaxed matrix as described by Nembach and Neite (1985). The matrix grain size (dg), was 1.3 and 15 µm in the two asreceived conditions for the GE and NASA heats, respectively (Gao et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

“…These unique characteristics (Gao et al, 2005) are: exceptional elevated temperature strength, high resistance to creep, oxidation, corrosion (Jiang et al, 2015), and good fracture toughness.…”

Section: Introductionmentioning

confidence: 99%

“…This is of high significance because of passengers and crew lives and aerospace vehicle integrity. In the presented study, investigation of mechanical fatigue at elevated temperatures, maximum exposure time and temperature allowed for nickel-base super alloy "ME3" in aerospace gas turbine engines with employment of experimental data (Gao et al, 2005;Misra, 2012;Anvari, 2014;Gabb et al, 2002;Gabb et al, 2009;Assoul et al, 2008), giving rise to analytical solutions. The results of analytical method can contribute to an improvement of the safety and reliability of aerospace gas turbine engines including nickel-base super alloy, ME3.…”

Section: Introductionmentioning

confidence: 99%

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Failure of Nickel-based super alloy (ME3) in aerospace gas turbine engines

Anvari¹

2017

J. Chem. Eng. Mater. Sci.

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The significant goal of this study is to develop a system to determine the margin of safety for ME3 super alloy in aerospace gas turbine engines. This margin of safety can be defined as critical temperature, force stress, exposure time, and cycles. In this research, by applying analytical solutions and using experimental data, equations are obtained to predict the life of a nickel-base super alloy in aerospace gas turbine engines. The experimental data that are applied to obtain the equations are achieved by gas turbine environment simulation experiments. This environment is contained with mechanical cycles at high temperature. The results that are achieved by these solutions are compared with the data from an experiment on a composite material. This comparison has proved that the results of this study seem logical. Ultimately, by employing of convex, concave, and linear equations, many results to predict the life of ME3 are obtained. Main reasons in ME3 failure at gas turbine engine environment is determined by this method. Based on the results of this research, the most important cause of ME3 failure is due to maximum mechanical force at high temperatures close to 763°C.

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“…Grain boundary engineering has been used to increase the fraction of "special grain boundaries", usually defined in terms of coincidence lattice site (CSL) boundaries. A high fraction of low Σ CSL boundaries {Σ (≤ 29)} has been shown to improve resistance to intergranular crack propagation in Inconel 600 [2,3] and to substantially improve the elevated temperature crack growth resistance of a nickel-based superalloy [4]. For type 304 stainless steel and alloy 600, high Σ CSL boundary fractions resulted in reduced crack growth rates.…”

Section: Introductionmentioning

confidence: 99%

Quantitative assessment of strain and heat treatment on twin formation in commercially pure nickel

Li¹,

Cahoon²,

Richards³

2007

WIT Transactions on Engineering Sciences, Vol 57

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Thermomechanical treatment comprising cold working to 6% strain followed by annealing at temperatures in the range 700 o C to 1000 o C greatly increases the fraction of special boundaries, primarily Σ3 type. The accompanying generation of annealing twins is analysed using the accident growth model due to Gleiter and the phenomenological model of Pande et al. It is shown that Gleiter's model, which contains no scaling factors, when used correctly, predicts the twin density in Cu alloys and pure nickel. The model due to Pande et al also predicts the twin density in Ni but this model incorporates two scaling factors that detract from its generality.

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High-cycle fatigue of nickel-based superalloy ME3 at ambient and elevated temperatures: Role of grain-boundary engineering

Cited by 129 publications

References 33 publications

Tailoring the Properties of a Ni-Based Superalloy via Modification of the Forging Process: an ICME Approach to Fatigue Performance

Tailoring the Properties of a Ni-Based Superalloy via Modification of the Forging Process: an ICME Approach to Fatigue Performance

Failure of Nickel-based super alloy (ME3) in aerospace gas turbine engines

Quantitative assessment of strain and heat treatment on twin formation in commercially pure nickel

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