| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Rapid Qualification
|
| Presentation Title |
Strong and Fracture-resistant High-entropy Alloy Intrinsically Toughened by 3D-printing |
| Author(s) |
Punit Kumar, David Cook, Huang Sheng, Matthew Michalek, Mingwei Zhang, Pei Wang, Andrew M. Minor, Upadrasta Ramamurty, Robert Ritchie |
| On-Site Speaker (Planned) |
Punit Kumar |
| Abstract Scope |
Due to their exceptional fracture resistance, the "Cantor alloy" and its derivative face-centered cubic (fcc) high- and medium-entropy alloys (CrCoNi) show promise as future structural materials for use at ambient and cryogenic temperatures. However, their relatively low yield strengths limit their potential for many engineering applications. The laser powder bed fusion (LPBF) can provide an alternative microstructural design path to overcome the strength-toughness tradeoff by introducing micro- and mesoscale structures. These hierarchical micro-and mesostructures can strengthen materials while preserving (and in some instances enhancing) their fracture toughness. The resistance to crack growth of the LPBF fcc HEA from its hierarchical micro-and mesostructures was assessed using nonlinear-elastic fracture mechanics by measuring R-curve behavior (J-integral) as a function of crack extension. In this presentation, the specific features of the hierarchical structures of different length scales and their effect on the strength and intrinsic/extrinsic toughening mechanisms will be discussed in detail. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, High-Entropy Alloys |