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Mechanical and tribological properties of PVD-coated cemented carbide as evaluated by a new multi-pass scratch testing method
Dalarna University, School of Technology and Business Studies, Materials Technology. (Tribologi)
Seco Tools.
Seco Tools.
Dalarna University, School of Technology and Business Studies, Materials Technology. (Tribologi)
2012 (English)In: Advances in Tribology, ISSN 1687-5915, E-ISSN 1687-5923, no 305209Article in journal (Refereed) Published
Abstract [en]

A new test method based on multipass scratch testing has been developed for evaluating the mechanical and tribological properties of thin, hard coatings. The proposed test method uses a pin-on-disc tribometer and during testing a Rockwell C diamond stylus is used as the “pin” and loaded against the rotating coated sample. The influence of normal load on the number of cycles to coating damage is investigated and the resulting coating damage mechanisms are evaluated by posttest scanning electron microscopy. The present study presents the test method by evaluating the performance of Ti0.86Si0.14N, Ti0.34Al0.66N, and (Al0.7Cr0.3)2O3 coatings deposited by cathodic arc evaporation on cemented carbide inserts. The results show that the test method is quick, simple, and reproducible and can preferably be used to obtain relevant data concerning the fatigue, wear, chipping, and spalling characteristics of different coating-substrate composites. The test method can be used as a virtually nondestructive test and, for example, be used to evaluate the fatigue and wear resistance as well as the cohesive and adhesive interfacial strength of coated cemented carbide inserts prior to cutting tests.

Place, publisher, year, edition, pages
2012. no 305209
National Category
Manufacturing, Surface and Joining Technology
Research subject
Steel Forming and Surface Engineering
URN: urn:nbn:se:du-11438DOI: 10.1155/2012/305209OAI: diva2:576508

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Available from: 2012-12-13 Created: 2012-12-13 Last updated: 2015-12-15Bibliographically approved

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