About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Heterostructured and Gradient Materials (HGM V): New Mechanistic Discoveries Enabling Superior Properties
|
Presentation Title |
High Strength and Ductility in a Heterostructured Nanotwinned Ni Film |
Author(s) |
Rohit Berlia, Jagannathan Rajagopalan |
On-Site Speaker (Planned) |
Jagannathan Rajagopalan |
Abstract Scope |
We report the synthesis and mechanical behavior of two nanotwinned (NT) Ni films, one with a uniform distribution of twin widths and the other with a heterogeneous distribution of twin widths. The NT Ni films, deposited on Si (111) substrates with an Ag buffer layer, are composed of two crystallographic variants with (111) out-of-plane orientation, which results in the formation of twin boundaries between them. While both films exhibited an ultimate tensile strength of over 1 GPa, the film with heterogeneous twin structure showed significant strain hardening as well, which led to uniform elongation of ~10%. These results suggest that by introducing heterogeneity in the twin width distribution it is possible to realize a synergistic combination of strength and ductility in NT metal films. |
Proceedings Inclusion? |
Planned: |
Keywords |
Thin Films and Interfaces, Mechanical Properties, Copper / Nickel / Cobalt |