| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Heterostructured and Gradient Materials (HGM VI): Principle, Processing and Properties
|
| Presentation Title |
Effects of Strong Interfaces and Intermetallic Layers on Strength Properties of ARB Processed Reactive Metals |
| Author(s) |
Rodney J. McCabe, Yifan Zhang, Miroslav Zecevic, Emma A Gordon, Hi Vo, Tom Nizolek |
| On-Site Speaker (Planned) |
Rodney J. McCabe |
| Abstract Scope |
We have developed modified accumulative roll bonding processes to successfully produce NMLs from the reactive metal combinations Ti-Al4Mg and Fe-Al4Mg with average layer thicknesses as fine as 50nm. We use micro-mechanical testing in an SEM coupled with EBSD, TKD, and TEM to characterize the mechanical properties and microstructures of these as-rolled materials and specimens that are annealed to form metal-intermetallic laminates. The high interface strengths in the as-rolled NMLs result in strengths of the Ti-Al4Mg and Fe-Al4Mg composites that are higher than Hall-Petch (50nm grain size) calculated strengths of the stronger Ti and Fe phases, respectively; whereas traditional ARB NMLs (i.e. Cu-Nb) typically have strengths that are intermediate to the Hall-Petch calculated strengths of the stronger and weaker phases. The annealed Ti-Al4Mg metal-intermetallic composites exhibit yield strengths as high as 3GPa. Efforts to improve the fracture toughness of the metal-intermetallic laminates will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Mechanical Properties |