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JMR Abstracts: June 1998
Article
An experimental device for depth-sensing indentation tests in mm-scale
N. Huber*, Ch. Tsakmakis+#
(*Universität Karlsruhe, +Forschungszentrum Karlsruhe, #Technische Hochschule Darmstadt)
A device for spherical indentation using a tip radius of 2 mm and loads up to 10 kN is presented. This facility can be applied e.g. to verify methods for characterizing the behavior of materials exhibiting homogeneous and isotropic constitutive properties. The indentation device can be driven both load- and depth-controlled. The accuracy of measurements is about 1 N for load and 0.2 <>mm for depth at a total depth of 200 <>mm.
Two materials, an austenitic steel and an aluminum alloy, have been tested and their Young's moduli have been determined. For determining the Young's modulus from spherical indentation data, use is made of a so- called Lt-method, which had been developed in Reference 1. Results obtained in this way are compared with corresponding values measured by one-dimensional homogeneous tensile experiments.
Keywords: metals; mechanical properties; nanoindentation
Order No.: JA806-029 © 1998 MRS
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