SUDDEN- Effect of surface phenomenon and defects on mechanical properties in additive manufacturing of Ti-6Al-4V
| Reference number | |
| Coordinator | GKN Aerospace Sweden AB - Avd 9633 R&T Engineering Methods |
| Funding from Vinnova | SEK 7 638 000 |
| Project duration | November 2017 - June 2023 |
| Status | Completed |
| Venture | National Aeronautical Research Program 7 |
| Call | 2017-02942-en |
Purpose and goal
Syftet med projektet SUDDEN var, förutom att utbilda en självständig forskare, att förstå hur defekter i additivt tillverkad metall påverkar utmattningslivslängden. Viktor Sandell har inom SUDDEN fullbordat sin forskarutbildning och han disputerade 2023-05-26. Genom att använda avancerade experimentella och statistiska metoder har Viktor framgångsrikt utvecklat en metodik för att bestämma en minsta utmattningslivslängd för en komponent tillverkad med den additiva metoden pulverbäddsteknik.
Expected results and effects
The project has resulted in six scientific articles of which four have already been published and two are to be submitted for publication. Furthermore, a licentiate thesis and a doctoral thesis have been written and defended. In addition to this, results from the project have also been disseminated in the form of presentations at national and international conferences and seminars. The research conducted within SUDDEN has resulted in an approved project within NFFP 8.1, AMFat.
Planned approach and implementation
The material investigated was the titanium material Ti 6-4, which was manufactured using powder bed technology and electron beam. The material was examined with respect to surface finish and defects within the material. The effect of defects and surface finish on fatigue life has been characterized using tensile and flexural fatigue. Based on the size of the defect that caused crack initiation, surface condition and/or defect population, the fatigue life was predicted and compared to the measured life.