Investigation and Measurement of Nanomechanical Properties of the HSS Powder Metallurgy ASP2017 and ASP2055 Steels

Abstract

The intention of the team of authors in the presented scientific article was experimental measurement with subsequent evaluation of nanomechanical properties of selected microstructural components of the investigated high-speed steels type ASP2017 and ASP2055 produced by powder metallurgy. The whole experiment was performed under laboratory conditions on an experimental apparatus called Hysitron TI 950 Triboindeneter. The used device is a part of the laboratory equipment of the Center for Diagnostics and Quality Testing of Materials. The proposed process of experimental research of the mentioned properties of PM steels was carried out precisely because of the relatively high require-ments for the use of this type of steel for the needs of special applications in the engineering industry. Therefore, the research of nanomechanical properties such as nanohardness H and the reduced and real Young's modulus Er and the Young's modulus of elasticity Es were therefore the subject of the authors' research. The authors proposed the use of a Berkovich geometry tip as a test or indentation body, respectively. In terms of the proposed structure of the article, the authors describe the current state of research from the assigned problem using database sources. The experimental part of their research already solves the obtained nanomechanical properties of individual components of the struc-ture of the tested PM steels, as well as the distribution of individual positions of indents. These were designed using so-called SPM scans (Scanning Probe Microscopy). Nanoindentation curves were generated from them using the Triboscan evaluation software. Based on the performed measurements and the Er obtained from them, and the Es was also calculated using mathematical relations. The authors graphically expressed the final values of nanomechanical quantities and described them in a discussion of the experiments.