Development of a New Testing Procedure for Performing Tensile Tests on Specimens with Sub-Millimetre Dimensions

    Volume 41, Issue 4 (July 2013)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 21 May 2013

    Page Count: 12


    Rathmayr, Georg B.
    Erich Schmid Institute of Materials Science–Austrian Academy of Sciences, Leoben,

    Bachmaier, Andrea
    Erich Schmid Institute of Materials Science–Austrian Academy of Sciences, Leoben,

    Pippan, Reinhard
    Erich Schmid Institute of Materials Science–Austrian Academy of Sciences, Leoben,

    (Received 17 May 2012; accepted 4 February 2013)

    Abstract

    A new method to conduct tensile tests with specimens ranging from a few millimetres down to 100 μm is presented. The tensile specimens are fabricated using a newly developed water-cooled circular grinding process that guarantees a high-accuracy geometry by keeping the fabrication-related material change to a minimum. Furthermore, the grinding tool is equipped with a mechanical polishing unit to make well-polished surfaces. Besides the specimen fabrication, the test setup is modified to allow a specimen related displacement measurement. This image-based system does not require any additional specimen markings and enables the evaluation of true stress, true strain, and the reduction in area. The whole method is successfully demonstrated for different types of metals ranging from ductile nickel to very brittle tungsten. In addition to the quality of the tensile test in this specimen size range, another advantage is the enormous reduced time for specimen fabrication and testing.


    Paper ID: JTE20120175

    DOI: 10.1520/JTE20120175

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    Author
    Title Development of a New Testing Procedure for Performing Tensile Tests on Specimens with Sub-Millimetre Dimensions
    Symposium , 0000-00-00
    Committee E28