A miniaturized thin‐plate low cycle fatigue test method at elevated temperature

Abstract

This study aims to develop a high-temperature low cycle fatigue test method using a nonstandard miniature thin-plate specimen in order to characterize the cyclic viscoplasticity behavior of a component material. For demonstration, fully reversed strain-range controlled low cycle fatigue and creep-fatigue tests at 600 C have been performed for a martensitic steel using standard-sized fullscale specimens and miniaturized thin-plate specimens, respectively. Because the displacement is not directly measured from the uniform gauge section of the miniaturized specimen, a geometry-dependent scaling factor is obtained and used to convert the uniaxial strain. The results obtained are shown that the miniaturized test method developed in this work has exhibited a clear possibility to produce comparable low cycle fatigue data with those that are normally obtained by conventional standard specimen tests.

Analytical and inverse method for determining high temperature properties of materials using small punch creep: a review

“…Thus, neural network has the promising to evolve as one of the accurate methods to achieve better curve fitting for the latter portion of the deflection responses. Besides, most of the inverse approaches focus on the small punch tensile test; however, the inverse method is still scarce in the SPCT and miniature fatigue testing (Li et al ., 2022). More work is needed in these scopes to improve the territory of inverse method in the future as well.…”