|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Pan American Materials Congress: Nanocrystalline and Ultra-fine Grain Materials and Bulk Metallic Glasses
||Current-assisted-extrusion of Structural Amorphous Metals: Insight into Microstructure Formation and Mechanical Properties
||Ekaterina Novitskaya, Sebastian Diaz de la Torre, Tzipatly A. Esquivel-Castro, Guillermo R. Dieguez-Trejo, Olivia A. Graeve
|On-Site Speaker (Planned)
Bulk metallic glass (BMG) and BMG-matrix composites are currently investigated for structural applications because of the potential to produce a material that is both strong and tough. However, most BMGs are inherently brittle at room temperature, especially in tension, because of shear localization. In situ crystalline composites (formed by devitrification) or ex situ crystalline composites (formed by addition of a second phase) can improve ductility. In this study, we report on a current-assisted-extrusion process for the formation of long rods of the structural amorphous metal Fe49.7Cr17.7Mn1.9Mo7.4W1.6B15.2C3.8Si2.4 with a 2.5 wt% addition of yttria nanoparticles as a reinforcement phase. Detailed analysis of phase formation, devitrification, and microstructural evolution, verifies that these SAM2X5 materials can be successfully extruded up to several cm in length at a 1000°C extrusion temperature. Subsequent analysis of mechanical properties via microhardness testing demonstrates that the properties of the extruded SAM2X5 materials significantly surpasses those of common steels.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)