Kinetics of creep damage accumulation induced by a room-temperature plastic deformation introduced during processing of AM1 Ni-based single crystal superalloy

Utada, Satoshi; Rame, Jérémy; Hamadi, Sarah; Delautre, J.; Villechaise, Patrick; Cormier, Jonathan

doi:10.1016/j.msea.2020.139571

Cited by 16 publications

(7 citation statements)

References 55 publications

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“…According to a previous study, pores can nucleate and grow during microstructure evolution associated with dislocation climb. [69] After the heat treatment, and as expected from the experiment design, a high density of c/c¢ interfacial dislocation networks (white arrows), coarsened c¢ precipitates, and tertiary c¢ precipitates within c matrix (black arrows) are visible in the ECCI image of this sample (see Figure 14(c)). [65] These features are all in accordance with previous studies on pre-strain effect on Ni-based SX superalloys.…”

Section: B Recrystallization Of Pre-strained Sx Superalloysupporting

confidence: 54%

“…This concept is taken from pre-straining studies on Ni-based SX superalloys that showed elastic strain around slip bands that accelerates the development of a c/c¢ interfacial dislocation network and c¢ precipitate coarsening. [65,[67][68][69] Tensile deformation was performed on CMSX-4Ò at room-temperature (RT) using the ETMT system and interrupted at 7 pct plastic strain. The same CMSX-4Ò sample was then heat-treated at 1100 °C for 6 hours by DC current in the ETMT to develop a dislocation network and coarsen precipitates.…”

Section: B Recrystallization Of Pre-strained Sx Superalloymentioning

confidence: 99%

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In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies

Utada

Sasaki

Reed

et al. 2022

Metall Mater Trans A

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In this study, resistivity measurements are made during continuous heating and cooling on four different Ni-based superalloys of different grain structures and with different phases (i.e., γ′ and carbide). The results are directly compared with differential scanning calorimetry (DSC) profiles to identify the material’s resistivity response. The resistivity measurements have been performed using an electro-thermal mechanical testing (ETMT) system having a capability of heating and cooling a sample at a rate of up to 100 K/s by Joule heating, which is not possible with standard heating methods used in previous in-situ microstructure analysis approaches. By comparing different precipitate variations and thermal histories, γ′ volume fraction and precipitate number density are found to be the most important factors determining the resistivity of the materials. In-situ resistivity measurement was applied to several case studies to show that it can provide microstructural information in complex high temperature experiments.

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Section: B Recrystallization Of Pre-strained Sx Superalloysupporting

confidence: 54%

Section: B Recrystallization Of Pre-strained Sx Superalloymentioning

confidence: 99%

In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies

Utada

Sasaki

Reed

et al. 2022

Metall Mater Trans A

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“…Moreover, recrystallized grain boundaries were observed inside γ precipitates near the fracture surface as indicated by the white arrows in Figure 9. Although recrystallization was not confirmed in the present results using techniques such as EBSD, similar observations have been reported in other studies [16,42].…”

Section: Mirostructure Analysessupporting

confidence: 79%

“…Recrystallization of the SX superalloy during creep testing at a low stress condition has been reported in a limited number of studies [17,61]. The size of recrystallized grains shown in Figure 9 is less than 1 µm, which agrees with recrystallization observed in Rene N5 after creep testing at 982 • C / 206 MPa [61] and pre-deformed AM1 tested at 1050 • C/140 MPa that locally accumulates very high strain [16,42]. Therefore, dynamic recrystallization is suggested to occur during the very last stages of creep deformation due to the local strain accumulation where substantial necking occurs.…”

Section: Creep Deformation Mechanisms Of Ni-based Sx Superalloys At 1250 • Csupporting

confidence: 79%

Ultra-High Temperature Creep of Ni-Based SX Superalloys at 1250 °C

Utada

Despres

Cormier

2021

Metals

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Very high temperature creep properties of twelve different Ni-based single crystal superalloys have been investigated at 1250 °C and under different initial applied stresses. The creep strength at this temperature is mainly controlled by the remaining γ′ volume fraction. Other parameters such as the γ′ precipitate after microstructure evolution and the γ/γ′ lattice parameter mismatch seem to affect the creep strength to a lesser degree in these conditions. The Norton Law creep exponent lies in the range 6–9 for most of the alloys studied, suggesting that dislocation glide and climb are the rate limiting deformation mechanisms. Damage mechanisms in these extreme conditions comprise creep strain accumulation leading to pronounced necking and to recrystallization in the most severely deformed sections of the specimens.

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“…Another area, where those measurements are also highly utilized are electrochemical batteries and energy storage cells, where temperature control is used to monitor device performance and stability during charging cycles, therefore preserving its properties for as long as possible and estimating its lifetime [ 12 , 13 ]. Monitoring temperature is also useful during plastic or metal production to ensure the quality of the products and workplace security [ 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

ZnO ALD-Coated Microsphere-Based Sensors for Temperature Measurements

Listewnik

Bechelany

Jasiński

et al. 2020

Sensors

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In this paper, the application of a microsphere-based fiber-optic sensor with a 200 nm zinc oxide (ZnO) coating, deposited by the Atomic Layer Deposition (ALD) method, for temperature measurements between 100 and 300 °C, is presented. The main advantage of integrating a fiber-optic microsphere with a sensing device is the possibility of monitoring the integrity of the sensor head in real-time, which allows for higher accuracy during measurements. The study has demonstrated that ZnO ALD-coated microsphere-based sensors can be successfully used for temperature measurements. The sensitivity of the tested device was found to be 103.5 nW/°C when the sensor was coupled with a light source of 1300 nm central wavelength. The measured coefficient R2 of the sensor head was over 0.99, indicating a good fit of the theoretical linear model to the measured experimental data.

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Kinetics of creep damage accumulation induced by a room-temperature plastic deformation introduced during processing of AM1 Ni-based single crystal superalloy

Cited by 16 publications

References 55 publications

In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies

In-Situ Monitoring of Phase Transition and Microstructure Evolution in Ni-Based Superalloys by Electrical Resistivity: Direct Comparison With Differential Scanning Calorimetry and Application to Case Studies

Ultra-High Temperature Creep of Ni-Based SX Superalloys at 1250 °C

ZnO ALD-Coated Microsphere-Based Sensors for Temperature Measurements

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