dc.contributor.authorLiu, Dan
dc.contributor.authorPons, Dirk John
dc.contributor.authorWong, Ee-hua
dc.identifier.citationLiu, D., Pons, D. J., & Wong, E.-h. (2016). The Unified Creep-Fatigue Equation for Stainless Steel 316. Metals, 6(9), 219-. doi:10.3390/met6090219en_US
dc.description.abstractBackground—The creep-fatigue properties of stainless steel 316 are of interest because of the wide use of this material in demanding service environments, such as the nuclear industry. Need—A number of models exist to describe creep-fatigue behaviours, but they are limited by the need to obtain specialized coefficients from a large number of experiments, which are time-consuming and expensive. Also, they do not generalise to other situations of temperature and frequency. There is a need for improved formulations for creep-fatigue, with coefficients that determinable directly from the existing and simple creep-fatigue tests and creep rupture tests. Outcomes—A unified creep-fatigue equation is proposed, based on an extension of the Coffin-Manson equation, to introduce dependencies on temperature and frequency. The equation may be formulated for strain as εp=C0c(T,t,εp)N−β0 , or as a power-law εp=C0c(T,t)N−β0b(T,t) . These were then validated against existing experimental data. The equations provide an excellent fit to data (r2 = 0.97 or better). Originality—This work develops a novel formulation for creep-fatigue that accommodates temperature and frequency. The coefficients can be obtained with minimum experimental effort, being based on standard rather than specialized tests.en_US
dc.format.extent18 p.en_US
dc.rights© 2016 by The Author(s); licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.subjectDRNTU::Engineering::Mechanical engineeringen_US
dc.titleThe unified creep-fatigue equation for stainless steel 316en_US
dc.typeJournal Article
dc.contributor.researchEnergy Research Institute @NTUen_US
dc.description.versionPublished versionen_US

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