|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIII
||Protocols for Multi-step Thermoplastic Processing of Metallic Glasses
||Punnathat Bordeenithikasem, Sungwoo Sohn, Ze Liu, Jan Schroers
|On-Site Speaker (Planned)
Thermoplastic forming (TPF) of bulk metallic glasses (BMGs) has been extensively explored as an effective fabrication method for BMG application development. As more complex geometries are designed, a combination of TPF steps is required. The study of the effect that prior TPF steps has on subsequent steps, especially in terms of crystallization behavior, is essential to the design of multi-step TPF processes. Isothermal annealing at multiple temperatures and sequences was used to emulate temperature profiles of multi-step TPF of BMGs. When a single annealing temperature was used, the time to crystallization is additive. When the sample is first annealed at a higher temperature and quenched to a lower temperature, time till crystallization is increased, and vice versa. The temperature dependence of nucleation and growth rates is used to explain these phenomena. Technologically, the revealed multi-step protocols allow TPF where a higher formability is achieved, compared to a simply additive process.
||Planned: A print-only volume