Strength ranking for interfaces between a TiN hard coating and microstructural constituents of high speed steel determined by micromechanical testing

Materials & Design

Stefan Marsoner¹  Christian Mitterer²  Harald Leitner³  Gerald Ressel³  Martin Krobath³  Michael Wurmshuber⁴  Thomas Klünsner⁴  Verena Maier-Kiener⁴  Daniel Kiener⁴  Matthias Gsellmann⁴  Werner Ecker⁵ 

[1] Co KG – Mariazellerstraße 25, 8605 Kapfenberg, Austria;Corresponding author.;Department of Materials Science, Montanuniversität Leoben, Franz-Josef-Straße 18, 8700 Leoben, Austria;Materials Center Leoben Forschung GmbH (MCL), Roseggerstraße 12, 8700 Leoben, Austria;;Voestalpine Böhler Edelstahl GmbH &

关键词: Micropillar;    Interface strength;    Coating adhesion;    Carbides;    FEM simulation;   

DOI  :  

来源: DOAJ

【 摘 要 】

Knowledge about the adhesion of protective hard coatings on tool materials is of great importance to understand their failure mechanisms in metalworking. Until now, common techniques such as scratch and indentation tests are used to establish a qualitative ranking of a coating’s adhesion on various substrate materials. Nevertheless, there is a lack of quantitative measures to describe the strength of the interfaces between individual microstructural constituents of substrate-coating composites. The current work investigates the interfacial strength and thus the adhesion of TiN deposited as a hard coating on an MC-type carbide, an M6C-type carbide and on martensite being constituents of high speed steels. Tensile stresses were introduced at the interface between TiN and the individual microstructural constituents of a high speed steel via micromechanical testing of a novel MSC specimen within a scanning electron microscope. The tested MSC specimens were subsequently investigated in detail by scanning electron microscopy. Evaluation of the interface stress at fracture via finite element analysis yielded a ranking in interface strength and therefore coating adhesion in a sequence from high to low strength values from MC/TiN over M6C/TiN to martensite/TiN.

【 授权许可】

Unknown