About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Design, Materials, Manufacturing, Challenges and Applications
|
| Presentation Title |
Role of Minor Composition Changes in Driving Uncertainty in the Mechanical Properties of AM Fabricated Materials |
| Author(s) |
Ian J. Wietecha-Reiman, Todd Palmer |
| On-Site Speaker (Planned) |
Ian J. Wietecha-Reiman |
| Abstract Scope |
Standard alloy compositions, like 316L austenitic stainless steel and Inconel 625, have been designed with relatively wide compositional ranges that, when combined with proper temper, produce consistent microstructures during wrought and cast manufacture. Lot-to-lot scatter in tensile properties is often on the order of 10’s of MPa. However, when these same alloy compositions are implemented in additive manufacturing (AM), the lot-to-lot scatter of tensile properties can be on the order of 100 MPa. One of the factors that differentiates these lots of materials are the species of secondary phases that precipitate during solidification. Understanding how seemingly minor changes in within-standard composition drive the formation of unexpected phases will be crucial in fabricating reliable components using AM techniques. |