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High Temperature Tension HSB Device Based on Direct Electrical Heating

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Details

Original languageEnglish
Title of host publicationDynamic Behavior of Materials, Volume 1
Subtitle of host publicationProceedings of the 2014 Annual Conference on Experimental and Applied Mechanics
EditorsBo Song, Daniel Casem, Jamie Kimberley
PublisherSpringer
Pages227-233
Number of pages7
Volume65
ISBN (Electronic)978-3-319-06995-1
ISBN (Print)978-3-319-06994-4
DOIs
Publication statusPublished - 2015
Publication typeA4 Article in a conference publication
EventSociety for experimental mechanics annual conference & exposition on experimental and applied mechanics -
Duration: 1 Jan 1900 → …

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
PublisherSpringer
ISSN (Print)2191-5644

Conference

ConferenceSociety for experimental mechanics annual conference & exposition on experimental and applied mechanics
Period1/01/00 → …

Abstract

The effects of strain rate and temperature on the mechanical properties of various engineering materials have been extensively studied within the past few decades. However, the high temperature high strain rate tension Hopkinson Split Bar (HSB) testing is still quite challenging to perform due to the need to fix the sample to the stress bars. Mechanical fixing of a sheet material sample is not very convenient and can produce low quality results. Therefore, the sheet samples are typically glued directly to the stress bars. This glue joint, however, loses strength rapidly if the temperature of the glue joint increases above room temperature, which makes the high temperature testing more difficult. In this paper, we present a tension Hopkinson Split Bar device with a high temperature system that allows the sample to be heated while keeping the glue joint at or close to room temperature. The sample is rapidly heated by a powerful low voltage high amperage DC pulse. When testing stainless steels, test temperatures between 400 and 800 °C are reached in less than one second, and even the melting temperature of the material is reached in less than 2 s. The system is fully computer controlled allowing accurate timing and control of the different actions during the test including heating of the sample, pneumatic manipulation of the heating electrodes, releasing of the striker bar, and recording of the test results. The results obtained with the current high temperature system are high quality and the obtained high temperature stress strain curves are essentially oscillation free. © The Society for Experimental Mechanics, Inc. 2015.

Keywords

  • High strain rate, High temperature, Hopkinson split bar, Stainless steels, Tension testing

Publication forum classification

Field of science, Statistics Finland