|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||General Poster Session
||O-5: Analysis of Plastic Deformation in Ti-Zr-Ni Quasicrystals
||Geunhee Yoo, Eunsoo Park, Chaewoo Ryu, Jinyeon Kim
|On-Site Speaker (Planned)
Quasicrystals exhibit very unique properties such as high hardness, wear-resistance, and high hydrogen storage ability due to absence of translational symmetry in atomic packing. However, the absence of translational symmetry in quasicrystals causes brittle fracture and unique deformation mechanisms unlike simple ductile crystalline metals. Although there have been several attempts to clarify the deformation mechanism of quasicrystals, it is still undisclosed. In the present study, we will report the effect of microstructure and strain rate on plastic deformation of Ti-Zr-Ni quasicrystals. We have analyzed statistically the serration of plastic flow by nanoindentation test to reveal the variation of mechanical signal depending on cooling rate as well as composition. After then, we measure strain rate sensitivity of each sample and connect mechanical response to microstructure of quasicrystal via cooling history as well as composition. Our attempt might be an effective route for improving the damage tolerance of quasicrystals upon plastic flow.
||Planned: Supplemental Proceedings volume