| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Tension-compression Asymmetry in Plasticity of Nanoporous Gold |
| Author(s) |
Hansol Jeon, Eun-Ji Gwak, Hangeul Kim, Ju-Young Kim |
| On-Site Speaker (Planned) |
Hansol Jeon |
| Abstract Scope |
Mechanical behavior of nanoporous gold (np-Au) has been extensively studied by nanoindentation test, but 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. Three np-Au samples were prepared and the mechanical tests were performed using in-situ push-to-pull (P-to-P) devices for tensile testing and with the nanoindenter for compressive testing. We found two significant things related with tension-compression asymmetry; (1) the tensile yield strengths are higher than the compressive yield strengths and (2) the size effect exponent n in σy ∝ dL^-n where σy is the yield strength and dL is average ligament size is greater in compression. We discuss the effect of loading mode on deformation and size effect in strength. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |