MODEL FOR TERTIARY-CREEP IN Mo- AND CrMo-STEELS

Sandström, R.; Kondyr, A. I.

doi:10.1016/b978-1-4832-8414-9.50052-3

Cited by 16 publications

(6 citation statements)

References 3 publications

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“…Results for fitting creep curves for 0.5Mo, 1Cr0.5Mo, and 2.25Cr1Mo gave the relation [16] Ω 4 = 5.6/ε R (10) which is in close agreement with Equation (9).…”

Section: Creep Strainsupporting

confidence: 73%

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Basic Analytical Modeling of Creep Strain Curves

Sandström

2023

Materials

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Creep strain versus time curves (creep curves) have traditionally been described with the help of empirical models where a number of adjustable parameters are involved. These models are simple to use, but they cannot be applied for prediction. For understanding the general behavior of primary and tertiary creep, they are still useful. In fact, the phi model can represent primary creep, and the Omega model tertiary creep for a number of materials. However, in recent years, basic analytical models have been formulated that can predict and describe creep strain data without using fitting parameters. In the paper, a review of these models is given. A number of applications of the models are also given. It is demonstrated that the basic models can quantitatively predict observations. They also provide derivations of some empirical findings.

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“…Results for fitting creep curves for 0.5Mo, 1Cr0.5Mo, and 2.25Cr1Mo gave the relation [16] Ω 4 = 5.6/ε R (10) which is in close agreement with Equation (9).…”

Section: Creep Strainsupporting

confidence: 73%

“…ε tert is the creep rate in the tertiary stage, ε is the creep strain, and Ω 3 and Ω 4 are constants. This model was proposed many years ago [15,16]. Later the model was called the Omega (Ω) model [17].…”

Section: Empirical Models For Creep Curvesmentioning

confidence: 99%

Basic Analytical Modeling of Creep Strain Curves

Sandström

2023

Materials

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“…Many of these comprise components originating from a small number of classical representations of primary, secondary, and/or tertiary creep deformation (e.g. [17][18][19][20][21][22][23][24][25][26], Table 1). …”

Section: Model Equation Optionsmentioning

confidence: 99%

Factors influencing creep model equation selection

Holdsworth

Askins

Baker³

et al. 2008

International Journal of Pressure Vessels and Piping

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“…They simply assumed that the cavities represented voids that reduced the loading capacity. The most interesting feature of the method is that it is consistent with behaviour of creep strain during the tertiary creep, that is, the final stage before rupture [6,7]. This dependence is nowadays referred to as the omega method [8].…”

Section: Introductionmentioning

confidence: 99%

Survey of Creep Cavitation in fcc Metals

Sandström¹,

He²

2017

Study of Grain Boundary Character

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Cavitation plays an important role in plants operating at high temperatures since the cavitation controls the creep failure of engineering alloys. In the past it has been difficult to predict the cavitation behaviour with the help of basic models, since critical models have been missing. Recently new models have been formulated for grain boundary sliding, cavity nucleation and cavity growth to fill this gap. These models are reviewed in this chapter. It is shown that the new models can quantitatively predict cavitation for austenitic stainless steels, where detailed experimental information is available.

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MODEL FOR TERTIARY-CREEP IN Mo- AND CrMo-STEELS

Cited by 16 publications

References 3 publications

Basic Analytical Modeling of Creep Strain Curves

Basic Analytical Modeling of Creep Strain Curves

Factors influencing creep model equation selection

Survey of Creep Cavitation in fcc Metals

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