About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Bulk Metallic Glasses XVII
|
Presentation Title |
Microstructural, Mechanical and Thermal Characterization of Mg65Ni25Y5M5 (M= Si, B, La) Amorphous Alloy by Melt Spinning |
Author(s) |
Celal Kursun, Dan Thoma, John H. Perepezko |
On-Site Speaker (Planned) |
Celal Kursun |
Abstract Scope |
Mg65Ni25Y5M5 (M= Si, B, La) alloys were synthesized by melt spinning at a wheel speed of 55 ms-1. Structural evolutions, thermal behaviors and mechanical properties of these alloys were systematically characterized through X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), flash differential scanning calorimetry (Flash DSC) and Vickers microhardness (HV). The XRD, SEM and TEM results revealed that the melt spun ribbons have an amorphous structure. According to Flash DSC results, the amorphous Mg65Ni25Y5M5 (M= Si, B, La) alloys exhibited a distinct glass transition temperature (𝑇𝑔) and a wide supercooled liquid region (Δ𝑇𝑥 = 𝑇𝑥 − 𝑇𝑔) before crystallization. The 𝑇𝑔 ranges from 199-223 ˚C for the different M components and Δ𝑇𝑥 ranges from 61-72 ˚C. The microhardness of the as-quenched ribbons was measured in the range of 315 HV – 336.8 HV. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |