About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Origin of Super Plastic Behavior of Bulk Metallic Glass with Complex Icosahedral Order |
Author(s) |
Geun Hee Yoo, Wook Ha Ryu, Myeong Jun Lee, Eun Soo Park |
On-Site Speaker (Planned) |
Geun Hee Yoo |
Abstract Scope |
Bulk metallic glasses have limited plasticity even under compression, resulting from shear localization and work softening. However, like ductile crystalline alloys, several monolithic BMGs have shown extraordinary plasticity under compression without catastrophic failure (super plastic behavior). This super plastic behavior of metallic glass is often considered because of high Poisson ratio.
In the present study, we made bulk metallic glass with complex icosahedral order by adding BCC high-entropy alloy (Ti-Mo-Nb-Ta) in Zr-Cu-Ni-Al alloys. The developed metallic glass shows super plastic behavior and high fracture toughness despite the low Poisson ratio. We will report the effect of degree of icosahedral order on mechanical properties of metallic glass by systemically controlling BCC high entropy alloy contents through synchrotron high energy X-ray scattering. Through these attempts, we can figure out the role of icosahedral ordering in metallic glass and suggest an effective strategy for maximizing mechanical stability represented as super plastic behavior. |
Proceedings Inclusion? |
Planned: |
Keywords |
Phase Transformations, Mechanical Properties, |