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Hard X-ray photoelectron spectroscopy study of oxide films on additively manufactured stainless steel

Reference number
Coordinator SWERIM AB - Material- och Processutveckling
Funding from Vinnova SEK 500 000
Project duration March 2020 - April 2022
Status Completed
Venture Research infrastructure - utilisation and collaboration
Call Industrial pilot projects for the utilisation of neutron and photon based techniques at large-scale infrastructures - Autumn 2019

Purpose and goal

The project was carried out by Alfa Laval, Quintus Technologies, and Swerim. The HAXPES station at P22 beamline (Petra III) was successfully used for the characterization of the surface oxide on additively manufactured materials with different post-processing. The project demonstrated that the synchrotron-based HAXPES provides detailed information about the chemical composition and structure of the inner and outer layers of the oxide scale, which can be used for the prediction of corrosion behavior. The data analysis pipeline was created and successfully implemented.

Expected results and effects

The results of HAXPES measurements allowed us to obtain detailed information about the chemical composition and structure of the inner and outer layers of the oxide scale for 316L additively manufactured steel with different surface treatments. The ability of the instrument to perform highly-automatized measurements within a short time was confirmed. The data analysis routines were implemented. The results will be further evaluated by Alfa Laval, Quintus Technologies, and Swerim to explain and predict the stress corrosion cracking behavior of the tested materials.

Planned approach and implementation

The experiment has been performed at P22 beamline (Petra III, Hamburg). Samples of AM 316L SS were cut from the printed columns and mounted on the sample holder. The HAXPES spectra were measured using 7.5 keV and 2.5 keV photon energies and at two incidence angles. The samples after high-pressure high-temperature treatment shot peening and pickling were tested (13 samples, about 400 spectra during 40h beamtime). The participating companies were familiarized with the technique and will consider using it in their research and development work.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 27 May 2022

Reference number 2019-05301

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