Lifing the thermo-mechanical fatigue (TMF) behaviour of the polycrystalline nickel-based superalloy RR1000

Jones, Jonathan; Whittaker, Mark; Lancaster, Robert

doi:10.1051/matecconf/20141419001

Cited by 3 publications

(3 citation statements)

References 15 publications

(19 reference statements)

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“…In many instances, the properties of these alloys can be further tailored or engineered by modifying the grain boundary structure or character distribution [4][5][6]. For example, the fatigue properties of high strength, polycrystalline Ni-based superalloys are highly sensitive to both the grain size and grain boundary character distributions [7][8][9]. In recent years, demand for increasing performance requirements and operating temperatures for advanced turbine engines has pushed the capabilities of existing polycrystalline Ni-based superalloys toward their limitations.…”

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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“…Based on the previous work on RR1000 specifically, it can be seen that TMF life is dependent on a currently undefined relationship between phase angle and strain range. For IP and OOP tests of ∆ε=0.8-1.4% and T= 300-700°C, the OOP cycle showed a longer life than IP for ∆ε>1%, but was reversed at lower ∆ε [9]. SC-TMF tests performed at phase angles between IP and OOP showed a consistent increase in TMF life for ∆ε=1% when phase angle progresses from IP to OOP [10].…”

Section: Introductionmentioning

confidence: 82%

A holistic approach to Thermo-Mechanical Fatigue phase angle effects for an aerospace nickel superalloy

Gray

Jones

Whittaker

et al. 2022

International Journal of Fatigue

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“…It is supposed to help with the modelling of the laminate failure prediction, which is still under the consideration of science [ 37 , 38 ]. For laminates, the modelling methods used mainly in the case of brittle materials are adapted [ 39 ], but also those applied for nanomaterials [ 40 , 41 ], as well as behavior modelling by long-term [ 42 ] or cyclic [ 43 , 44 ] loads. In order to predict and model the above, it is necessary to understand the structure of the material in laminates; methods similar to those used for the classic materials are used [ 45 ].…”

Section: Introductionmentioning

confidence: 99%

Failure Progress of 3D Reinforced GFRP Laminate during Static Bending, Evaluated by Means of Acoustic Emission and Vibrations Analysis

Kozioł

Figlus

2015

Materials

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The work aimed to assess the failure progress in a glass fiber-reinforced polymer laminate with a 3D-woven and (as a comparison) plain-woven reinforcement, during static bending, using acoustic emission signals. The innovative method of the separation of the signal coming from the fiber fracture and the one coming from the matrix fracture with the use of the acoustic event’s energy as a criterion was applied. The failure progress during static bending was alternatively analyzed by evaluation of the vibration signal. It gave a possibility to validate the results of the acoustic emission. Acoustic emission, as well as vibration signal analysis proved to be good and effective tools for the registration of failure effects in composite laminates. Vibration analysis is more complicated methodologically, yet it is more precise. The failure progress of the 3D laminate is “safer” and more beneficial than that of the plain-woven laminate. It exhibits less rapid load capacity drops and a higher fiber effort contribution at the moment of the main laminate failure.

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Lifing the thermo-mechanical fatigue (TMF) behaviour of the polycrystalline nickel-based superalloy RR1000

Cited by 3 publications

References 15 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

A holistic approach to Thermo-Mechanical Fatigue phase angle effects for an aerospace nickel superalloy

Failure Progress of 3D Reinforced GFRP Laminate during Static Bending, Evaluated by Means of Acoustic Emission and Vibrations Analysis

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