Dataset: Nitrogen Enrichment of Timetal 834 via Laser Surface Treatment for Improved High-Temperature Oxidation Resistance: A Proof of Concept

This record contains all files generated in the preparation process of the following publication: D. Kuczyńska-Zemła, L. Lavisse, M.R. Zemła, J.M. Jouvard, P. Wieciński, P. Bazarnik, P. Berger, V. Optasanu, S. Sorieul, J. Jouve, F. Herbst and M.C. Marco de Lucas "Nitrogen Enrichment of Timetal 834 via Laser Surface Treatment for Improved High-Temperature Oxidation Resistance: A Proof of Concept", submitted to Surface and Coatings Technology. Abstract: This study explores the application of nanosecond Laser Surface Treatment to improve the high-temperature oxidation resistance of the near-𝛼 Timetal 834 (Ti-Al-Sn-Zr-Nb-Mo-Si-C). LSTs were conducted using different laser parameters to deliberately increase the nitrogen content in the surface layer, resulting in samples with distinct surface colors. Oxidation results at 650 °C for 100 hours in an ambient air atmosphere revealed a reduction in the value of the mass gain after exposure to high-temperature of LST samples, highlighting the potential of the performed treatment for developing oxidation-resistant surfaces. To explain the observed phenomenon, the surface layer of modified Ti834 samples was analyzed in terms of morphology, roughness, phase and chemical composition, as well as its microstructure. Particular emphasis was placed on examining the nitrogen content, its phase, quantity, and arrangement in the surface layer. The nitrogen content of each LST sample was quantified by nuclear reaction analysis (NRA), and the interrelationship with its oxidation resistance was investigated. Notably, the sample with the highest nitrogen content (TiO𝑥N𝑦) also exhibited the best performance after 100 hours of high-temperature oxidation. Cross-sectional analysis of the best samples revealed that the LST zone affects 2 μm of the Ti834 surface layer. Grain refinement, along with accompanying changes in the surface layer – including nitrogen enrichment – may have contributed to improved high-temperature oxidation resistance Designations: Ti834 - near alpha titanium alloy Timetal 834 (Ti-5.8Al-4.0Sn-3.5Zr-0.7Nb-0.5Mo-0.35Si-0.06C)LST - Laser surface treatment UM - unmodifiedUC - uncoloredY - yellowP - purpleB1 - blue 1stB2 - blue 2ndcs - cross-section Folders content: Mass gain - file with the mass gain, obtained from the oxidation test (.txt)Light microscopy - images of the surface from Light microscopy (.jpg)NRA - file with the NRA results (.txt)Optical profilometry - images of the surface from optical profilometry and a file with Sa roughness (.txt, .jpg)Raman - files with the Raman spectra for all investigated samples (.txt)SEM cross-section - images of the cross-section from the Scanning Electron Microscope (.jpg)SEM surface - images of sample surfaces from Scanning Electron Microscope (.jpg)STEM cross-sections - images of the cross-section from Scanning Transmission Electron Microscope (.jpg)STEM mapping - chemical composition analysis of the cross-sections (.jpg)XRD - data of XRD analysis This research was funded in whole by [The National Science Center, Poland] [2023/48/C/ST11/00265]