On the Development of ICME Tools for Creep and Aging of CMSX®‐8

Rodas, Ernesto A. Estrada; Gorgannejad, Sanam; Neu, Richard W.; Dyer, Z.; Draa, Phillip; Shinde, and S.R.

doi:10.1002/9781119075646.ch71

Cited by 2 publications

(3 citation statements)

References 41 publications

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“…Interesting, when the oxidation‐assisted fatigue mechanism is operating under zero‐compression loadings, the differences in lives between lower Re and 3% Re superalloys are much less than a factor of two, suggesting that the main benefit of the Re is reducing creep and stabilizing the precipitates. The coarsening and rafting of the γ′ precipitates is faster when there is less Re, which can be predicted by CALPHAD models that account for the increase in diffusivity when Re is reduced …”

Section: Introductionmentioning

confidence: 91%

“…12 Interesting, when the oxidation-assisted fatigue mechanism is operating under zero-compression loadings, the differences in lives between lower Re and 3% Re superalloys are much less than a factor of two, 12 suggesting that the main benefit of the Re is reducing creep and stabilizing the precipitates. The coarsening and rafting of the γ′ precipitates is faster when there is less Re, 12,29,34 which can be predicted by CALPHAD models that account for the increase in diffusivity when Re is reduced. 29,34 This paper presents new experimental results on CMSX-8 that aim to show how several of these critical parameters, in particular, temperature, crystallographic orientation, and strain ratio, influence the CF behaviour.…”

Section: Introductionmentioning

confidence: 96%

“…The coarsening and rafting of the γ′ precipitates is faster when there is less Re, 12,29,34 which can be predicted by CALPHAD models that account for the increase in diffusivity when Re is reduced. 29,34 This paper presents new experimental results on CMSX-8 that aim to show how several of these critical parameters, in particular, temperature, crystallographic orientation, and strain ratio, influence the CF behaviour. Two crystallographic orientations, <001> and <111>, having the greatest difference in elastic properties are studied.…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Creep‐fatigue behaviour of single‐crystal Ni‐base superalloy CMSX‐8

Rodas

Gorgannejad

Neu

2019

Fatigue Fract Eng Mat Struct

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The creep‐fatigue behaviour of a lower cost, reduced rhenium Ni‐base superalloy, CMSX‐8, a variant of CMSX‐4, cast in a single crystal was experimentally evaluated over a broad range of conditions, from room temperature to 1100°C, and for two loading orientations: <001> and <111>. The fatigue lives depend on the orientation, cycle type, and temperature. The relative importance of these parameters on influencing the life is identified and discussed. From this understanding, a simple life model is constructed to capture the influence of these broad test conditions. The results are compared with those of the higher Re superalloy, CMSX‐4.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

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Creep‐fatigue behaviour of single‐crystal Ni‐base superalloy CMSX‐8

Rodas

Gorgannejad

Neu

2019

Fatigue Fract Eng Mat Struct

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Employing sequential experiments to gain insights on the interaction between creep and fatigue damage in Ni‐base superalloys

Gorgannejad

Rodas

Neu

2022

Fatigue Fract Eng Mat Struct

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The interaction between creep and fatigue damage in Ni-base superalloy CMSX-8 was explored using a sequential workflow that decouples creep and fatigue steps to quantify how accumulated creep damage interacts with subsequent isothermal low-cycle fatigue (LCF) and vice versa. Two workflows were considered: creep followed by LCF and LCF followed by creep. For the first workflow, the subsequent LCF was evaluated at temperatures of 20 C, 750 C, and 1100 C. It was found that the extent of deleterious interaction of prior creep on LCF depended on increasing subsequent fatigue test temperature. For the LCF followed by creep, fatigue tests were first conducted at 20 C and 1100 C to 60% of life, and then creep was conducted at 800 C, where primary creep is promoted, or 900 C, where primary creep is absent. LCF damage accumulated at 1100 C accelerated creep and decreased ductility, while fatigue damage at room temperature had minimal effect on the creep behavior.

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On the Development of ICME Tools for Creep and Aging of CMSX®‐8

Cited by 2 publications

References 41 publications

Creep‐fatigue behaviour of single‐crystal Ni‐base superalloy CMSX‐8

Creep‐fatigue behaviour of single‐crystal Ni‐base superalloy CMSX‐8

Employing sequential experiments to gain insights on the interaction between creep and fatigue damage in Ni‐base superalloys

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