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Open AccessArticle

Short-Term Characterization of Spherical 100Cr6 Steel Samples Using Micro Compression Test

1
Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, 28359 Bremen, Germany
2
Leibniz Institute for Materials Engineering–IWT, Badgasteiner Straße 3, 28359 Bremen, Germany
*
Author to whom correspondence should be addressed.
Materials 2020, 13(3), 733; https://doi.org/10.3390/ma13030733
Received: 19 December 2019 / Revised: 31 January 2020 / Accepted: 4 February 2020 / Published: 6 February 2020
(This article belongs to the Section Structure Analysis and Characterization)
For the establishment of a novel development process of new structural materials, short-term characterization methods capable of testing hundreds of spherical micro samples are needed. This paper introduces a compression test on spherical micro samples as a short-term characterization method to investigate the elastic-plastic deformation behavior. To demonstrate the potential of this newly developed method, the micro compression test is performed with a maximum loading of 300 N on 100Cr6 (AISI 52100 bearing steel) samples, with a diameter of 0.8 mm, in 15 different heat treatment conditions. The austenitizing temperature is varied between 800 and 1150 °C. Tempering of the samples is carried out in a differential scanning calorimetry process with temperatures of 180, 230 and 300 °C. Out of force-displacement curves and stress-strain relations, so-called descriptors (characteristic values) which are sensitive to the applied heat treatment can be extracted. The change of mechanical properties due to heat treatment and the resulting microstructure is presented by the trend of a stress descriptor in dependence of austenitizing and annealing temperature, which can be compared to the trend of the tensile strength as a material property obtained by conventional tensile tests. The trend of the descriptor determined in the compression test on spherical samples indicates the validity of this approach as a short-term characterization method. View Full-Text
Keywords: compression test; spherical micro samples; mechanical descriptor; force–displacement curves; bearing steel 100Cr6; microstructure compression test; spherical micro samples; mechanical descriptor; force–displacement curves; bearing steel 100Cr6; microstructure
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MDPI and ACS Style

Sonnenberg, H.; Clausen, B. Short-Term Characterization of Spherical 100Cr6 Steel Samples Using Micro Compression Test. Materials 2020, 13, 733. https://doi.org/10.3390/ma13030733

AMA Style

Sonnenberg H, Clausen B. Short-Term Characterization of Spherical 100Cr6 Steel Samples Using Micro Compression Test. Materials. 2020; 13(3):733. https://doi.org/10.3390/ma13030733

Chicago/Turabian Style

Sonnenberg, Heike; Clausen, Brigitte. 2020. "Short-Term Characterization of Spherical 100Cr6 Steel Samples Using Micro Compression Test" Materials 13, no. 3: 733. https://doi.org/10.3390/ma13030733

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