About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Temperature Effects in the Microscale Deformability of Yttria Stabilized Zirconia Prepared by Spark Plasma Sintering |
Author(s) |
Jaehun Cho, Jin Li, Qiang Li, Jie Ding, Han Wang, Sichuang Xue, Amiya Mukherjee, Haiyan Wang, Xinghang Zhang |
On-Site Speaker (Planned) |
Jaehun Cho |
Abstract Scope |
3 mol % yttria-stabilized zirconia (3YSZ) has been extensively used as a structural material due to high strength and superb fracture toughness. Here, we prepared 3YSZ by means of spark plasma sintering technique to produce ultrafine grains and investigated temperature dependent deformation mechanisms (25 ~ 670 degree C) at microscale using in-situ microcompression tests. Martensitic transformation toughening dominates the mechanical behaviors of YSZ below 400 degree C. However, it is gradually superseded by grain boundary sliding triggered by ultrafine grains above 400 degree C. When tested at 670 degree C, significantly enhanced plastic flow resulting from dislocation activity along with grain boundary sliding was observed. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |