Pressure and temperature effects on the decomposition of arc evaporated Ti0.6Al0.4N coatings during metal cutting
2012 (English)In: Surface & Coatings Technology, ISSN 0257-8972, E-ISSN 1879-3347, Vol. 209, 203-207 p.Article in journal (Refereed) Published
The isostructural decomposition of arc evaporated Ti0.6Al0.4N coatings at the elevated temperatures and high stresses occurring during metal cutting have been studied. Comparisons are made with short time (t=10 min) anneals at temperatures typical for steel turning operations. The evolution of the decomposed domain sizes are studied by analytical transmission electron microscopy from samples originating from the rake face. Temperature and force measurements during turning allowed for separation of the effects of the temperature and stresses on domain size evolution. The results show a peak temperature of around 900 °C and a peak normal stress of around 2 GPa during cutting. The overall domain size is larger after cutting compared to the annealed sample at the same temperature. The results suggest that pressures generated during cutting promote coherent isostructural decomposition which is in line with theoretical studies but for considerably higher pressures.
Place, publisher, year, edition, pages
2012. Vol. 209, 203-207 p.
IdentifiersURN: urn:nbn:se:liu:diva-78825DOI: 10.1016/j.surfcoat.2012.08.068ISI: 000310656200029OAI: oai:DiVA.org:liu-78825DiVA: diva2:536088
Funding Agencies|Swedish Foundation for Strategic Research (SSF) project Designed Multicomponent Coatings, Multifilms||2012-06-212012-06-212015-06-01Bibliographically approved