Characterization and modeling of quenching-induced residual stresses in the nickel-based superalloy IN718

Dye, David; Conlon, K. T.; Reed, Roger C.

doi:10.1007/s11661-004-0079-7

Cited by 58 publications

(42 citation statements)

References 19 publications

(25 reference statements)

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“…In other words, using a strain hardening model and ignoring rate dependency at all temperatures is sufficient when computing the as-cast residual stresses. This result is consistent with both the findings of Bru et al, [34] who showed that the residual stresses in welding are mainly affected by the low-temperature mechanical properties, as well as the findings of Dye et al, [35] who examined residual stresses in quenched Ni-based superalloys. In both previous studies, the material investigated was quenched during cooling in order to achieve the desired final mechanical properties.…”

Section: B Sensitivity Analysissupporting

confidence: 93%

As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling

Drezet

Phillion

2010

Metall Mater Trans A

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The presence of thermally induced residual stresses, created during the industrial direct chill (DC) casting process of aluminum alloys, can cause both significant safety concerns and the formation of defects during downstream processing. Although numerical models have been previously developed to compute these residual stresses, most of the computations have been validated only against measured surface distortions. Recently, the variation in residual elastic strains in the steady-state regime of casting has been measured as a function of radial position using neutron diffraction (ND) in an AA6063 grain-refined cylindrical billet. In the present study, these measurements are used to show that a well-designed thermomechanical finite element (FE) process model can reproduce relatively well the experimental results. A sensitivity analysis is then carried out to determine the relative effect of the various mechanical parameters when computing the as-cast residual stresses in a cylindrical billet. Two model parameters have been investigated: the temperature when the alloy starts to thermally contract and the plasticity behavior. It is shown that the mechanical properties at low temperatures have a much larger influence on the residual stresses than those at high temperatures.

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Section: B Sensitivity Analysissupporting

confidence: 93%

As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling

Drezet

Phillion

2010

Metall Mater Trans A

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“…The measured thermo-physical data (Tab. 2) are similar to the values given by Dye et al [15] For proprietary reasons the applied yielding data as well as the thermal conductivity data cannot be disclosed.…”

Section: Reviewssupporting

confidence: 80%

Diffraction‐Based Residual Stress Analysis Applied to Problems in the Aircraft Industry

Staron¹,

Cihak

Clemens

et al. 2007

Adv Eng Mater

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Cost reduction and weight saving are most important principles governing design and construction of aircrafts. Advanced alloys and thermo‐mechanical treatments as well as new and optimized production processes are being developed. For example, welding of fuselage components like stringers or clips made of Al alloys can have several advantages over riveting. Retention of optimum weld microstructure and properties as well as control of welding related residual stresses and distortion is essential. In the context of risk analysis and damage tolerance it will be of growing importance to study residual stress fields in weld configurations and their influence on fatigue crack propagation. In this paper, methods to evaluate residual stresses in turbine discs and laser welded Al joints are reviewed.

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“…Also a variation of the value of h did not improve the predictions. A systematic variation of various input parameters of the simulation revealed that a more detailed knowledge of the heat transfer coefficient h as a function of temperature is required for improving the model in case of the thin plate [21]. The smaller thickness, leading to a faster cooling of the plate, seems to be responsible for a stronger influence of the exact function of h(T) on the predicted stress distribution.…”

Section: Resultsmentioning

confidence: 99%

Characterization of Residual Stresses in 718 Turbine Discs by Neutron Diffraction and Finite Element Modelling

Staron

Cihak

Clemens

et al. 2011

AMR

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Abstract.The results of our investigations on residual stresses in commercially produced forged IN 718 compressor discs are reviewed. The residual stresses in the discs with a diameter of 320 mm and a thickness of up to 25 mm were studied using neutron diffraction to verify the predictions of a finite element simulation, which was used to model forging and cooling of the discs. In addition to the disc, a thin plate of the same material was also studied for testing the influence of specimen geometry on the model predictions. While the model results for the disc were not strongly influenced by the heat transfer coefficient, the stress distributions in the thin plate could only be predicted satisfactorily by using a temperature-dependent heat transfer coefficient that was derived from temperature measurements during quenching. Eventually, this led to an improvement of the FE simulation used for optimizing the production process.

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Characterization and modeling of quenching-induced residual stresses in the nickel-based superalloy IN718

Cited by 58 publications

References 19 publications

As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling

As-Cast Residual Stresses in an Aluminum Alloy AA6063 Billet: Neutron Diffraction Measurements and Finite Element Modeling

Diffraction‐Based Residual Stress Analysis Applied to Problems in the Aircraft Industry

Characterization of Residual Stresses in 718 Turbine Discs by Neutron Diffraction and Finite Element Modelling

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