Abstract
We report fabrication and nanomechanical tension experiments on as-fabricated and helium-implanted ∼130 nm diameter Ni73P27 metallic glass nanocylinders. The nanocylinders were fabricated by a templated electroplating process and implanted with He+ at energies of 50, 100, 150, and 200 keV to create a uniform helium concentration of ∼3 atom % throughout the nanocylinders. Transmission electron microscopy imaging and through-focus analysis reveal that the specimens contained ∼2 nm helium bubbles distributed uniformly throughout the nanocylinder volume. In situ tensile experiments indicate that helium-implanted specimens exhibit enhanced ductility as evidenced by a 2-fold increase in plastic strain over as-fabricated specimens with no sacrifice in yield and ultimate tensile strengths. This improvement in mechanical properties suggests that metallic glasses may actually exhibit a favorable response to high levels of helium implantation.
Original language | English (US) |
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Pages (from-to) | 5176-5183 |
Number of pages | 8 |
Journal | Nano letters |
Volume | 14 |
Issue number | 9 |
DOIs | |
State | Published - Sep 10 2014 |
Bibliographical note
Publisher Copyright:© 2014 American Chemical Society.
Keywords
- Amorphous
- Ni-P
- ductility
- irradiation
- mechanical properties