Evolution of mechanical anisotropy in nano-scale metallic-glass thin films under indentation

Yun Che Wang, Chun Yi Wu

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

The mechanical behavior of Cu-Zr-Al metallic-glass thin films under indentation was studied with the molecular dynamics simulation methodology to investigate changes of microstructures through degrees of elastic anisotropy. In this work, the (Cu50Zr50)100-xAlx, where x is measured by atomic percentage, was studied by molecular dynamics (MD) simulation. Our metallic-glass models were first sputter-deposited on crystalline substrate byMDwith consideration argon working gas. The interaction between argon working gas and metallic atoms was modeled by the pair-wise Moliere potential. The as-deposited films were amorphous after equilibration, and their mechanical properties were characterized by ultra-nano-indentation simulations by MD with a right-Angle diamond conical indenter tip, as well as a strain perturbation method to identify full elastic constants under the tip. Through region-byregion probes of the elastic properties of the film after being indented, it is found that local elastic anisotropy changes in relation to locations and penetration depth.

Original languageEnglish
Pages (from-to)575-578
Number of pages4
JournalProcedia Engineering
Volume79
DOIs
Publication statusPublished - 2014
Event37th National Conference on Theoretical and Applied Mechanics, NCTAM 2013, Conjoined with the 1st International Conference on Mechanics, ICM 2013 - Hsinchu, Taiwan
Duration: 2013 Nov 82013 Nov 9

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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