| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing:
Incorporating Breakthrough Functionalities for Building Large Scale Components
|
| Presentation Title |
Notch Strengthening of Powder-DED Processed 316L Stainless Steel with Inconel 718 |
| Author(s) |
Kenneth Britton DeGarmo, Dwight Smith, Calvin Stewart |
| On-Site Speaker (Planned) |
Kenneth Britton DeGarmo |
| Abstract Scope |
The objective of this study is to empirically demonstrate the concept of notch strengthening through directed energy deposition (DED) multi-material additive manufacturing (MMAM). Emerging capabilities of MMAM allow for spatial tailoring of materials within a single part, overcoming drawbacks of traditional subtractive manufacturing. Spatial Materials Design (SMD) then becomes feasible, wherein materials are deposited in specific topological regions within a part to strengthen against various phenomena while reducing cost and weight. In this study, DED and wire EDM are employed to produce notch-strengthened specimens where SS316L is sharply transitioned into IN718 in the notch. Tensile results show that notch strengthening was achieved, with the notch-strengthened samples demonstrating superior ultimate tensile strength to those of pure SS316L. Differences in elasticity, yielding, and cross-section between the materials result in unique ductility for the notch-strengthened samples, demonstrating the potential for ductility enhancement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Other |