About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Self-organizing Nano-architectured Materials
|
Presentation Title |
Mechanical Behavior of Nanoporous Gold with Ligament-size Effect under Tension and Compression |
Author(s) |
Hansol Jeon, Eunji Song, Ju-Young Kim |
On-Site Speaker (Planned) |
Hansol Jeon |
Abstract Scope |
For the mechanical behavior of nanoporous gold (np-Au), systemic analysis on the deformation of np-Au in both tension and compression is not fully carried out. In this study, we investigated mechanical behavior of np-Au in tension and compression. By preparing micro-scale samples without grain boundaries and cracks, we could focus on the mechanical properties only. Four np-Au samples were prepared, and the mechanical tests were performed using in-situ push-to-pull (P-to-P) devices, the nanoindenter, and custom-built micro-mechanical tester. We found two significant things related with tension-compression asymmetry; (1) the tensile yield strengths are higher than the compressive yield strengths except for the greatest ligament size dL and (2) Tensile yield strengths can be described with one-size effect exponent m in σy ∝ dL-m, while compressive yield strengths show no ligament size-effect beyond dL greater than 402 nm. We discuss the effect of loading mode and dislocation activities in the ligaments. |
Proceedings Inclusion? |
Undecided |
Keywords |
Mechanical Properties, Nanotechnology, Other |