About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
Effect of Ni-Nb Metallic Glass on Moderating the Shock Damage in Crystalline Ni-amorphous Ni62Nb38 Nanocomposite Structure: A Molecular Dynamics Study |
Author(s) |
Kontala Vijay Reddy, Snehanshu Pal |
On-Site Speaker (Planned) |
Kontala Vijay Reddy |
Abstract Scope |
In this atomistic simulation study, the influence of Ni-Nb metallic glass on the dynamic response of crystalline Ni-amorphous Ni62Nb38 nanocomposite under shock loading is investigated. Structural analyses are carried out via different methods i.e. pressure profile, kinetic energy maps, and atomic strain. Results show that lower velocity shocks have minimal impact on the structural transformation whereas higher velocities demonstrate FCC-to-BCC transformation in the specimen. Kinetic energy maps and atomic strain analysis reveal that presence of amorphous phase has helped in subduing the shock propagation by decreasing the shock intensity. Structural transformation in metallic glass is analyzed via Voronoi analysis which shows that icosahedral clusters are disintegrated and higher coordination number clusters are developed under shock loading. Overall, this work can provide fundamental understanding of the atomistic behaviour of crystalline-amorphous nanocomposites/nanolaminate structures under shock loading which can contribute towards designing metallic systems to withstand high impact loads. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |