About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
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Symposium
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Additive Manufacturing of Metals: Microstructure, Properties and Alloy Development
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Presentation Title |
Effects of Process Parameters and Defects on S-N Fatigue of LPBF AlSi10Mg |
Author(s) |
Collin J. Sharpe, Austin Q. Ngo, Christopher J. Tuma, Michael Shinohara, Holly J. Martin, John J. Lewandowski |
On-Site Speaker (Planned) |
Collin J. Sharpe |
Abstract Scope |
The effects of changes in process parameters and resulting defects on tension and S-N fatigue behavior of additively manufactured AlSi10Mg have been determined through fatigue testing of cylindrical samples according to ASTM E466. Samples were prepared under the following conditions: nominal + HIP (A), large defects + HIP (B), small to medium defects + HIP (G), many defects + HIP (D), large defects with no HIP (E), and small to medium defects with no HIP (F). Optical and SEM images of the fracture surfaces have been captured and used to quantify fatigue-initiating defects, including those that did not produce catastrophe. Differences in the characteristics and number of defects that initiated fatigue cracking will be reviewed in conjunction with the tension and S-N data. |