| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Mechanical Behavior of Induced Lack of Fusion Flaws in AlSi10Mg |
| Author(s) |
Brett P. Conner, John J Lewandowski, Austin Ngo, Varthula De Silva Jayasekera, Griffin Jones, Kenneth C Meinert |
| On-Site Speaker (Planned) |
Brett P. Conner |
| Abstract Scope |
It is desirable to use laser powder bed fusion to fabricate replacement parts that are flight critical. In order to gain confidence in the additive process during qualification and certification, it is important to understand the effects of rogue flaws on the properties and service life of a part fabricated by laser powder bed fusion. The performance of nominal (defect-free) material must be compared to material with readily detectable flaws as well as material with difficult to detect flaws. Here, several sizes of lack of fusion defects are created in AlSi10Mg parts by systematically varying process parameters to create insufficient melt pool overlap. Parts are fabricated with selective placement of flaws of various sizes. Nondestructive evaluation is conducted using computed tomography, radiographic testing, and phase compensated resonance testing. Next, tensile strength, constant amplitude fatigue strength, fracture toughness, and fatigue crack growth resistance are measured and reported. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |