Effect of stress on additive manufactured metals and their corrosion properties (SAMCO)
| Reference number | |
| Coordinator | SWERIM AB - Swerim AB, Kista |
| Funding from Vinnova | SEK 3 898 500 |
| Project duration | November 2019 - May 2024 |
| Status | Ongoing |
| Venture | The strategic innovation programme for Metallic material |
Purpose and goal
The project aim is to evaluate stress corrosion cracking (SCC) properties of additive manufactured (AM) stainless steel (SS) components, AM 316L SS, and thereby open up a new market in end-user applications where there is risk a for SCC, by: - Addressing AM 316L SS limitations in terms of SCC resistance for a given application and hence supporting end users to achieve top performance of the material. - Investigating the link between SCC and different surface states/residual stress from post-processing treatments of AM and conventional 316L SS.
Expected results and effects
The project results will contribute to safe usage of AM 316L SS materials in harsh environments where there is a risk for stress corrosion cracking, by evaluating and optimising their SCC resistance. This in turn will allow for made to measure components, more complex geometries in field service and possibly reduced requirement for time consuming and costly post-processing actions as well as avoiding long lead times of customised service items.
Planned approach and implementation
The project is divided in work packages that includes the following tasks: - Production of test specimens: AM and conventional 316L SS - Post-processing treatments of test material - Microstructural characterisation after post-processing - Characterisation of residual stress after post-processing using laboratory XRD, EBSD and synchrotron/neutron diffraction - Evaluation of SCC sensitivity by laboratory testing - Evaluation of SCC sensitivity by field-testing (in end-user application) - Post-characterisation after SCC testing (laboratory and field-tests)