RT Journal Article
T1 Reactivity of PVD cathodic arc coated hardmetal tools with Inconel 718: 												Correlation between diffusion couples and tool wear in drilling tests
A1 Ardila-Téllez, L. C.
A1 Jiménez, A.
A1 Moreno-Téllez, C. M.
A1 Arizmendi, M.
A1 Mujica-Roncery, L.
A1 Sánchez, J. M.
AB The reactivity of Al0.66Ti0.33N, Al0.31Ti0.62Si0.07N, Al0.60Cr0.40N, and Al0.38Cr0.54Si0.07N cathodic arc-coated hardmetal tools with Inconel 718 has been evaluated by using diffusion couple experiments at 900 °C and 1100 °C. As expected, a strong reaction occurs at these temperatures between Inconel 718 and uncoated hardmetal samples leading to the formation of η phases; mainly M12C and M6C carbides. PVD coatings act as diffusion barriers limiting the presence of such reactions as long as they maintain their structure in contact with Inconel 718 at high temperatures. Diffusion couple experiments confirm that Cr-containing coatings are significantly more unstable than Al0.66Ti0.33N or Al0.31Ti0.62Si0.07N materials, thus leading to notable differences in cutting performance. The relation between diffusion couple results and drill wear mechanisms in drilling Inconel 718 with different coating materials are also analysed. The best results are obtained either with Al0.66Ti0.33N or Al0.31Ti0.62Si0.07N coated drills, where the coating remains longer time at the cutting edge leading to more efficient protection, especially at the drill corner.
SN 0257-8972
YR 2023
FD 2023-10-25
LK https://hdl.handle.net/11556/3104
UL https://hdl.handle.net/11556/3104
LA eng
NO Ardila-Téllez , L C , Jiménez , A , Moreno-Téllez , C M , Arizmendi , M , Mujica-Roncery , L & Sánchez , J M 2023 , ' Reactivity of PVD cathodic arc coated hardmetal tools with Inconel 718 : Correlation between diffusion couples and tool wear in drilling tests ' , Surface and Coatings Technology , vol. 471 , 129892 . https://doi.org/10.1016/j.surfcoat.2023.129892
NO Publisher Copyright: © 2023 Elsevier B.V.
DS TECNALIA Publications
RD 1 ago 2024