Photo of Lina Rogström

Lina Rogström

Associate Professor, Docent

Presentation

My research focuses on hard, wear resistant coatings used for example by the tooling industry. Many tools for metal machining are covered with a thin layer (1-10 µm) of a hard material that increases the lifetime of the tool substantially. During metal machining, the tool is exposed to both high temperatures and pressures and the tool surface is worn when hard particles in the the chip slides across the surface. Coatings with high temperature stability and wear resistance are required to enhance the cutting performance and increase the cutting speed while reducing the need for cooling fluids.

To find materials that have a high wear resistance and that can be used at high temperatures an increased knowledge of the material behavior of the tool during use is needed. I use a combination of several experimental techniques to study the coating properties under conditions similar to the conditions the tool experiences in a metal machining operation. In addition, I use high-energy x-ray techniques to study the behavior of the tool in real time during machining.

Publications

2023

Janella Salamania, Alireza Farhadizadeh, K. M. Calamba Kwick, I. C. Schramm, Tun-Wei Hsu, Lars Johnson, Lina Rogström, Magnus Odén (2023) Influence of nitrogen vacancies on the decomposition route and age hardening of wurtzite Ti1−xAlxNy thin films Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films, Vol. 41, Article 063413 Continue to DOI
Maiara Moreno, Jon M. Andersson, Rachid MSaoubi, Vyacheslav Kryzhanivskyy, Mats P. Johansson-Jöesaar, Lars J. S. Johnson, Magnus Odén, Lina Rogström (2023) Adhesive wear of TiAlN coatings during low speed turning of stainless steel 316L Wear, Vol. 524-525, Article 204838 Continue to DOI
Naureen Ghafoor, Samira Dorri, Justinas Palisaitis, Lina Rogström, Babak Bakhit, Grzegorz Greczynski, Lars Hultman, Jens Birch (2023) Phase separation paths in metastable Zr1-xAlxN monolithic layers compared to multilayers with TiN: Growth versus annealing temperatures Materialia, Vol. 28, Article 101758 Continue to DOI
Janella Salamania, Katherine Calamba Kwick, Davide Giuseppe Sangiovanni, Ferenc Tasnadi, Igor A. Abrikosov, Lina Rogström, Lars Johnson, Magnus Odén (2023) High-resolution STEM investigation of the role of dislocations during decomposition of Ti1-xAlxNy Scripta Materialia, Vol. 229, Article 115366 Continue to DOI
Lina Rogström, Maiara Moreno, J. M. Andersson, M. P. Johansson-Jöesaar, Magnus Odén, K. Klementiev, Lars-Åke Näslund, Martin Magnuson (2023) Structural changes in Ti1-xAlxN coatings during turning: A XANES and EXAFS study of worn tools Applied Surface Science, Vol. 612, Article 155907 Continue to DOI