| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
|
| Presentation Title |
Microstructure-property Development During Directed Energy Deposition of Austenitic Stainless Steels |
| Author(s) |
Chris San Marchi, Thale Smith, Josh Sugar, Julie Schoenung |
| On-Site Speaker (Planned) |
Chris San Marchi |
| Abstract Scope |
The development of microstructure and properties during metal additive manufacturing is the result of the complex thermomechanical history imposed on the material. In the case of directed energy deposition (DED) of austenitic stainless steels, solidification and subsequent thermomechanical deformation strongly influence the microstructural evolution and resulting properties of the deposited material. While knowledge of analogous conventional processes like welding provide some insight to the microstructure-property relationships, the distinct length and time scales of DED must be considered to understand the unique multiscale microstructures that develop. Importantly, the large transient thermal gradients during deposition induce a complex elastic-plastic strain history, nonuniformity of mechanical properties (induced in part by plastic strains) and substantial residual stresses (intrinsically elastic). In this talk, DED of austenitic stainless steels is discussed with attention to microstructural evolution and strengthening mechanisms. |
| Proceedings Inclusion? |
Undecided |