Role of microstructural instability in long time creep life prediction

Claeys, Sandra; Jones, John W.

doi:10.1179/030634584790419764

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…It is therefore particularly important that full use be made of all the data that is available for each material of engineering importance. A areat deal of research has been conducted, primarily for metallic materials, on the modelling and understanding of creep behavior such as that of Brown et al (1986), Woodford (1974), Johnson et al (1977), Krishnamacheri and Notis (1977), Melton (1983), Chin and Straalsund (1983), and Claeys and Jones (1984). Of these approaches, one of the most promising seems to be that of Wilshire and his colleagues (Brown et al, 1986), in which the full curve of creep strain versus time is modelled as the sum of two terms, one representing the primary creep behavior, and the other the tertiary creep, with the secondary creep zone being nothing more than an inflection between these two zones.…”

Section: Introductionmentioning

confidence: 99%

Stress Rupture of Ceramics: Time-Temperature Relationships

Jones

1987

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation;

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Ceramic materials, such as Silicon Carbide and Silicon Nitride, have been considered as replacements for metals in many components of modern engines, as opportunities have arisen to make use of their unique properties. Improved production capabilities and end-product defect control have contributed to this progress, but limited information on the effect of these parameters on long term behavior, such as creep and stress rupture, may have contributed to some of the difficulties. This paper will examine the stress-rupture behavior of some ceramic materials, to demonstrate a unique relationship between the time to failure, at a given stress, and the temperature. The outcome is a single parameter combining the time to failure and temperature variables, which can allow designers to predict the useful life of ceramic components more accurately than insufficient data would otherwise allow.

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