| AVS 66th International Symposium & Exhibition | |
| Thin Films Division | Monday Sessions |
| Session TF+SE-MoA |
| Session: | HiPIMS and Reactive HiPIMS for Novel Thin Films |
| Presenter: | Md.Masud-Ur Rashid, KTH Royal Institute of Technology, Plasmatrix Materials AB, Sweden |
| Authors: | M.M. Rashid, KTH Royal Institute of Technology, Plasmatrix Materials AB, Sweden C.M. Nicolescu, KTH Royal Institute of Technology, Plasmatrix Materials AB, Sweden A. Archenti, KTH Royal Institute of Technology, Sweden G. Shuai, KTH Royal Institute of Technology R. Tomkowski, KTH Royal Institute of Technology, Sweden |
| Correspondent: | Click to Email |
Vibrations in metal cutting process such as turning have detrimental effect on productivity, finished surface roughness of workpiece and cutting insert life. During machining process high frequency vibration (equal to or above 10000 Hz) causes micro cracks to the cutting insert, which facilitate the failure of cutting insert and consequently resulted in higher roughness on workpiece surface. In this study a reactive high power impulse magnetron sputtering (R-HiPIMS) deposition process was used to deposit a thick copper and copper-carbon nitride (Cu:CuCNx) multilayered nano-structured composite coating, with higher stiffness and damping properties, on the shim. This coated shim was then used to suppress the high frequency vibration during rough turning operation. Scanning electron microscopy (SEM) of the coating cross section as well as energy dispersive x-ray spectroscopy (EDS) mapping of the cross-section confirms the multilayered structure with the presence of different rations of copper (Cu), carbon (C), and nitrogen (N). The Cu:CNx coating thickness was measured to be approximately 100 µm. The average surface hardness (SH) and cross-sectional hardness (CSH), measured by Vickers-microhardness indention, were found to be 353.2 HV and 149.5 HV respectively. Insert wear measurement after 30 minutes of rough turning process, reveals that the studied 100 µm Cu:CuCNx multi-layered composite coating material can reduce the tool wear by 60.5%. The average roughness value (Ra) of the work piece material is also reduced by 8.76% in case of using Cu:CNx coated shim comparing to conventional shim.