| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Effects of Process Parameters, Post-processing, and Defects on Tension and Fatigue Properties of LPBF AlSi10Mg |
| Author(s) |
Austin Q. Ngo, Collin Sharpe, Varthula Jayasekera, Brett Conner, Holly Martin, Christopher Tuma, John J Lewandowski |
| On-Site Speaker (Planned) |
Austin Q. Ngo |
| Abstract Scope |
Mechanical testing specimens of AlSi10Mg were fabricated via LPBF. Specimens were built in XY and Z orientations using multiple parameter sets, including optimized parameter sets to establish the baseline material properties and sub-optimal parameter sets to systematically induce lack of fusion defects of varying sizes. Multiple types of post-processing heat treatments were applied to the baseline and defect-induced specimens to study the effects of T6 heat treatment and/or HIP on defect population and mechanical properties. Specimens were machined for tension testing, constant amplitude fatigue testing, and three-point bend fatigue crack growth testing. Defect characteristics collected by metallography and fractography are compared across build parameter sets. Crack front plastic zone size is calculated and discussed in terms of interactions with defects and microstructure. The effects of build parameters, build orientation, post-processing, and lack of fusion defects on the subsequent mechanical properties will be covered. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Aluminum |