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Preparation of Samples for In Situ Deformation Testing and Analysis of Microstructure Development

In- situ testing is a new and progressive method of material analysis, which can offer new information about behavior of individual phases and structural components in metals. Local mechanical properties or strain distribution can be directly obtained for fine multiphase microstructures. The second application of in-situ stages lies in observation of phase transformations that occur either during heating, cooling or straining of metals. EBSD analysis can be also performed during in-situ testing if the stage allows tilting of the sample toward EBSD detector. Preparation of samples for in-situ testing is of the utmost importance for successful analysis. This work concentrated on sample preparation techniques used for flat samples of 42SiCr steel. Preliminary in-situ cold deformation tests of this steel with EBSD acquisition and observation of microstructure development were also carried out.