About this Abstract |
| Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
| Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
| Presentation Title |
Role of Defect Interaction and Multi-Site Damage in Fatigue Life of Additively Manufactured Metals |
| Author(s) |
Seyedmostafa Nasrollahpourshirvani, Aref Yadollahi |
| On-Site Speaker (Planned) |
Seyedmostafa Nasrollahpourshirvani |
| Abstract Scope |
Fatigue failure in additively manufactured (AM) metals is heavily influenced by the interaction of closely spaced process-induced defects and multi-site crack growth. Single-crack models were shown to overestimate fatigue life, particularly in low-cycle and mid-life regimes, by neglecting defect interactions. By incorporating nearest neighbor distance analysis and employing a multi-site crack growth framework, fatigue-life predictions aligned more closely with experimental results in these regimes. Multi-crack configurations captured the accelerated failure mechanisms driven by defect interaction and coalescence. This work proposes a defect-based predictive approach that integrates spatial defect data into fatigue-life estimation using a crack-growth-based model. The findings highlight the critical need to account for defect interactions in fatigue modeling to improve performance prediction and support the qualification and certification of AM components for fatigue-critical applications. |
| Proceedings Inclusion? |
Planned: Post-meeting proceedings |