In-situ TEM deformation of free-standing thin films and molecular dynamics simulations

0548723 - ÚFM 2023 RIV US eng C - Conference Paper (international conference)
Bajtošová, L. - Králík, R. - Křivská, B. - Veselý, J. - Fikar, Jan - Cieslar, M.
In-situ TEM deformation of free-standing thin films and molecular dynamics simulations.
AIP Conference Proceedings. Vol. 2411. Melville: Amerikan Institute of Physics, 2021 - (Sitek, J.; Vajda, J.; Jamnický, I.), č. článku 030002. ISBN 978-0-7354-4138-5. ISSN 0094-243X.
[APCOM 2021 - International Conference on Applied Physics of Condensed Matter /26./. Štrbské Pleso (SK), 23.06.2021-25.06.2021]
Institutional support: RVO:68081723
Keywords : thin films, nanocrystals, molecular dynamics * nanocrystals * molecular dynamics
OECD category: Coating and films

Mechanical properties of nanocrystalline films have been found to differ from typical features exhibited in bulk coarse grained materials. To gain insight for the casuses of higher yield and tensile strength and lower ductility measured in these films, experiments allowing direct observations of the deformation mechanisms such as in-situ transmission electron microscopy tensile testing as well as molecular dynamics computer simulations can be employed. A restricted time and size scale of molecular dynamics simulations results in simulations using strain rates several orders higher than strain rates and sample sizes smaller that generally used in real deformation experiments. In-situ tensile experiments of free-standing 50 nm thick nanocrystalline Al films have been realized and results were compared with the molecular dynamic simulation designed to approach the conditions of performed experiment in a reasonable computational time.
Permanent Link: https://hdl.handle.net/11104/0334682