Remaining life prediction of high temperature materials

Cane, B. J.; Williams, John A.

doi:10.1179/imr.1987.32.1.241

Cited by 44 publications

(22 citation statements)

References 30 publications

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“…The approach described above provides a basic framework for simulating the effect of these on the creep strain-time plots of metals and alloys. Having established validity of this approach with respect to the available experimental data 1) on section size effect in 0.5CrMoV steel it is worthwhile to examine the influence Table 2. Geometry independent damage expression.…”

Section: Discussionmentioning

confidence: 99%

“…1) Therefore fine cracks are developed in these layers and the effective cross section area of specimen decreases. As a result it is reasonable to assume that, the stress on the specimen continues to increase with time be-cause of the reduction in its load bearing section size.…”

Section: Damage Modelmentioning

confidence: 99%

“…It has been found that a specimen having a large cross sectional area gives a longer creep life because of the above interaction. 1) A clear understanding of the effects of section size and specimen geometry on creep properties is, therefore, of considerable technological significance to the design of engineering components. The effect of section size and specimen geometry in an oxidising environment has been reported by many researchers in literature.…”

Section: Introductionmentioning

confidence: 99%

“…On the otherhand, for steel specimens having more than 50 mm diameter, almost identical creep strain-time plots are obtained both in air and in vacuum. 1) The objective of the present work is to suggest a set of constitutive equations of creep in oxidising environment for predicting the performance of a component in actual service. A large volume of existing data on nickel base superalloys and steels having different section sizes have been used for validation.…”

Section: Introductionmentioning

confidence: 99%

“…The effect of section size and specimen geometry in an oxidising environment has been reported by many researchers in literature. [1][2][3][4] Usually a specimen having smaller section size exhibits a higher creep rate and consequently a shorter life. The effect is more pronounced as the section size decreases.…”

Section: Introductionmentioning

confidence: 99%

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Modelling of Interaction between Creep and Oxidation Behaviour for Engineering Materials

2001

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Mechanical test data for design of high temperature components are mainly collected from tests conducted in air even though these are used in different environment. Therefore, in order to predict accurately the performance of a component in actual service it is necessary to develop appropriate constitutive equations taking into consideration the environmental effect. The paper briefly describes how our current knowledge on Continuum Damage Mechanics (CDM) can be utilized to formulate the same. In absence of sufficient experimental data, most of the existing approaches provide only qualitative support for their models. Creep test on specimens having different section sizes, under identical conditions, can provide valuable information on creep/environment interaction. A simple analytical method has been developed to extract the material parameters determining the kinetics of environmental attack from a creep strain-time plot. It has been shown that the material constants thus obtained provide good explanation of the observed section size and geometry effects in steels and nickel base superalloys.

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Section: Discussionmentioning

confidence: 99%

Section: Damage Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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