| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior Related to Interface Physics IV
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| Presentation Title |
High Strength and Ductility in Metal Nanolaminates With Ultra-Thin Amorphous Ceramic Interfaces |
| Author(s) |
Xavier Maeder, Amit Sharma, Simon Tsianikas, Tijmen Vermeij, Vivek Devulapalli, Chunhua Tian, Johann Michler |
| On-Site Speaker (Planned) |
Xavier Maeder |
| Abstract Scope |
Nanolaminates can show an enhancement of both strength and ductility related to the structure and properties of the interfaces between the layers, as well as the thicknesses and properties of the individual layers. In this work, we precisely control the nature of the interfaces by adding a few nm of amorphous ALD Al2O3 interlayers in different Cu- and FeCoCrNi HEA- based nanolaminate systems. We additionally control the stacking fault energy, grain size and phases by Al addition in Cu and FeCoCrNi, respectively. The nanolaminates are made in a hybrid deposition chamber that alternate PVD and ALD without breaking the vacuum. The nanolaminates are tested by micropillar compression, nanoindentation, in situ tensile TKD in SEM as well as 4D STEM in TEM. All tested systems show exceptional yield stress and ductility. The multiple roles of the thin amorphous Al2O3 interface in the mechanical properties of the nanolaminates will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Thin Films and Interfaces, High-Entropy Alloys, Mechanical Properties |