Publication:
An enhanced method to evaluate tensile yield stress by small punch tests using deflection curves

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Date

2020-06-01

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Mdpi

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Abstract

While force-displacement curves are often preferred in Small Punch (SP) tests due to the ease of the experimental set-up, they encompass significant uncertainties arising from frame compliance. In this work, a methodology is presented to predict yield stresses from the force vs. deflection curves. The present method relies on determining different force levels from the initial part of the force-deflection curve to reflect both the slope and the curvature instead of using a single force level only. The predicted yield stresses for different types of materials, that is, low- and high-strength alloys, are found to be in good agreement with the actual proof stresses with a maximum error of 16%.

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Mechanical-properties, Creep-properties, P91 weldment, Fracture, Specimen, Steels, Small punch test, Deflection, Yield stress, Finite element method, Science & technology, Physical sciences, Technology, Chemistry, physical, Materials science, multidisciplinary, Metallurgy & metallurgical engineering, Physics, applied, Physics, condensed matter, Chemistry, Materials science, Metallurgy & metallurgical engineering, Physics

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