1.1 High-temperature residual stresses and phase transformations in CVD coatings
Developing and applying LSI-based diffraction methods to study Chemical Vapour Coatings of tools - providing knowledge, and a streamlined workflow for future industrial and academic R&I
Project summary
Wear resistant coatings are critical for the functionality and durability of cutting tool insert for machining of metals and, as they provide better performance and increases in tool lifetime up to several orders of magnitude compared to uncoated inserts. This in turns leads to more resource-efficent (fewer tools used, less scrapped part) and energy-efficient (less energy demanding machining parameters) manufacturing processes with increased sustainability (e.g. removing the need for coolants). For coatings deposited by chemical vapour deposition (CVD) the properties of the coatings are determined by the processing parameters through the resulting micro- and nanostructure, stress state, and post-deposition treatments. Timeresolved high-temperature measurements are critical for the understanding the development of the structure and stress in the coatings at the working temperature of tools, and will allow an
accelerated knowledge/model-driven research and innovation process targeting the critical processing parameter for property optimization.
The proposed project will develop, refine, and apply LSIbased diffraction methods for this purpose to a range of industrial coatings to provide both necessary knowledge, and a streamline workflow for future industrial and academic use. An important part is the exploration of in situ time-resolved measurements using laboratory-scale X-ray diffraction, aiming to push its limits as a complement to LSI techniques. The work will be complemented by traditional metallurgical investigations to verify observations.
Project duration
2024-2028
Key people
Project Leader: Magnus Hörnqvist Colliander (Chalmers University of Technology)
NEXT PhD student: Tijmen Jacobs (Chalmers University of Technology)
Project partners
Chalmers University of Technology, Linköping University, RISE Research Institutes of Sweden, Sandvik Coromant, Seco Tools, Walter Tools, Swerim