About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XX
|
Presentation Title |
Employment of Joule Heating and Simple Mechanical Loading to Stretch Bulk Metallic Glass Rod into Wire |
Author(s) |
Fiachra Robinson, Philip Meagher, David J. Browne |
On-Site Speaker (Planned) |
David J. Browne |
Abstract Scope |
Rods of a bulk amorphous Zr-based alloy, diameter 3 mm and 5mm, were manufactured by arc melting and suction casting. The supercooled liquid range and thermal stability were determined by DSC. The vertical rods were heated by applying a voltage across two electrodes along their axis, causing Joule heating. A calibrated infrared camera was used to estimate the rod temperature. When the target temperature was reached the power was cut and an attached weight was released to cause thermoplastic elongation and thinning of the rod. Natural cooling occurred simultaneously, so as the produced wire temperature dropped below the glass transition the strain rate dropped to zero. The process is explained and difficulties in its control are presented, along with suggestions on how to overcome them. It is believed that alloy fragility is an influencing factor. Strain rates achieved so far are insufficient to rejuvenate the BMG. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Shaping and Forming, Process Technology |