CaltechAUTHORS
Published March 15, 2023 | Version public
Journal Article Metadata-only

Scaling Law for Impact Resistance of Amorphous Alloys Connecting Atomistic Molecular Dynamics with Macroscale Experiments

Creators

  • 1. ROR icon Institute of Mechanics
  • 2. ROR icon University of Chinese Academy of Sciences
  • 3. ROR icon China Academy of Engineering Physics
  • 4. ROR icon Institute of Physics
  • 5. ROR icon Iowa State University
  • 6. ROR icon California Institute of Technology

Abstract

Establishing scaling laws for amorphous alloys is of critical importance for describing their mechanical behavior at different size scales. In this paper, taking Ni₂Ta amorphous metallic alloy as a prototype materials system, we derive the scaling law of impact resistance for amorphous alloys. We use laser-induced supersonic micro-ballistic impact experiments to measure for the first time the size-dependent impact response of amorphous alloys. We also report the results of molecular dynamics (MD) simulations for the same system but at much smaller scales. Comparing these results, we determined a law for scaling both length and time scales based on dimensional analysis. It connects the time and length scales of the experimental results on the impact resistance of amorphous alloys to that of the MD simulations, providing a method for bridging the gap in comparing the dynamic behavior of amorphous alloys at various scales and a guideline for the fabrication of new amorphous alloy materials with extraordinary impact resistance.

Additional Information

© 2023 American Chemical Society. X.W. acknowledges support from National Natural Science Foundation of China (12272391, 12232020). W.A.G. acknowledges support from ONR (N00014-19-1-2081). Author Contributions. Y.C., J.D., and F.L. contributed equally to this work. X.W. and W.A.G. designed research. Y.C. performed MD simulation. Q.A., Y.S., and W.A.G. obtained force field. J.D. performed impact experiments. F.L. prepared materials. K.X., X.W., M.J., Y.L., and C.H. analyzed data. Y.C., X.W., Q.A., and W.A.G. wrote the paper. All authors reviewed the manuscript. The authors declare no competing financial interest.

Additional details

Identifiers

Eprint ID
121116
Resolver ID
CaltechAUTHORS:20230420-698969800.2

Funding

National Natural Science Foundation of China
12272391
National Natural Science Foundation of China
12232020
Office of Naval Research (ONR)
N00014-19-1-2081

Dates

Created
2023-05-03
Created from EPrint's datestamp field
Updated
2023-06-08
Created from EPrint's last_modified field

Caltech Custom Metadata

Other Numbering System Name
WAG
Other Numbering System Identifier
1560