Abstract
Metallic materials exhibit three stages of creep; a primary decelerating rate, a secondary constant rate and a tertiary accelerating rate. Fig. 1 illustrates the three stages in terms of a graph of creep strain, ∈, as a function of the dimensionless parameters t/tf, where t is time and tf the time to fracture. The life-fraction, t/tf, occupied by each stage is not invariant, even within a single alloy system : test data indicate that the relative fractions depend upon :
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i
metallurgical variables — trace element content and processing history
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ii
engineering variables — testing temperature, stress level and stress state. Chemical reactivity and pressure of the surrounding fluid phase.
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© 1987 ECSC, EEC, EAEC, Brussels and Luxembourg
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Dyson, B.F. (1987). Modelling Creep and Fracture in Engineering Alloys. In: Marriott, J.B., Merz, M., Nihoul, J., Ward, J. (eds) High Temperature Alloys. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-1347-9_2
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DOI: https://doi.org/10.1007/978-94-009-1347-9_2
Publisher Name: Springer, Dordrecht
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