Study of Additive Manufacturing Intrinsic Defects on Fatigue Life of Ti-6Al-4V
The present work presents a new approach to studying the structural integrity of a Ti-6Al-4V alloy obtained by Selective Laser Melting (SLM). This approach is based on the intrinsic addictive manufacturing defects analysis obtained by nanotomography, the experimental S-N curve, and the small crack growth Murakami and Endo model. Also, two counting methods of 3D manufacturing intrinsic defects were considered. The simulation of S-N curves and the small crack propagation curves were successfully obtained. New models for predicted fatigue limit were developed, one using the (3D) variable area of the defects observed as the total area and the other using the total project area. The 3D total surface area counting method presents more conservative values on crack propagation studies, so it is recommended for integrity studies of Ti6Al4V alloy obtained by SLM.
Authors
- A.M. Pereira (ORCID: https://orcid.org/0000-0003-1219-0596)
- Rui F. Martins (ORCID: https://orcid.org/0000-0001-8155-0079)
- M.F.C. Pereira (ORCID: https://orcid.org/0000-0002-7932-8062)
- João Bosco da Mota Alves (ORCID: https://orcid.org/0009-0001-9951-7987)
- Teresa Morgado (ORCID: https://orcid.org/0000-0003-3294-042X)
Institutions
- University of Lisbon (PT)
- Instituto Politécnico de Leiria (PT)
- Universidade Politécnica de Lisboa (PT)
- Universidade Nova de Lisboa (PT)
- Escola Naval (PT)
Publication Details
- Published
- 2025-05-06
- DOI
- https://doi.org/10.3390/engproc2025090107
- Citations
- 1
- Primary Topic
- Additive Manufacturing Materials and Processes
- Type
- article
- Field-Weighted Citation Impact
- 0.71
Funders
- Centro de Recursos Naturais e Ambiente
- Universidade de Lisboa
- Universidade Nova de Lisboa
- UNIDEMI
- Instituto Superior Técnico