About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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Symposium
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AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
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Presentation Title |
Implications of X-CT Reliability to Determine Anomaly Distribution for Fatigue Assessment |
Author(s) |
Stefano Beretta, Behnam Salehnasab, Shaharyar Baig, Shuai Shao, Nima Shamsaei |
On-Site Speaker (Planned) |
Stefano Beretta |
Abstract Scope |
The probabilistic analyses are essential tools for structural integrity assessment of additively manufactured (AM) parts under cyclic loading, according to NASA TM-20240002004. The distribution of volumetric anomalies can be determined via: i) non-destructive evaluation (NDE); ii) polished sectioning; iii) distribution of defects at the fracture origin of fatigue specimens. X-ray Computed Tomography (X-CT) emerged as the reference technique for measuring the defects in AM materials.
In this study, the distribution of volumetric anomalies in AlSi10Mg samples manufactured by laser-powder bed fusion is presented. Machined samples were subjected to X-CT at 6/10/20 micron voxel sizes before testing. The specimens were then subjected to fatigue tests and the fracture surfaces were analyzed under SEM to measure the critical defect size. Statistical analyses of the detected anomalies revealed the effect of X-CT resolution on extreme defects by comparing the extrapolated distributions with the fractographic outcomes and the probability of detection (PoD) curves. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, |