About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Bulk Metallic Glasses XVII
|
Presentation Title |
Mechanical Deformation of Iron-based <i>in situ</i> Metallic Glass Matrix Composites |
Author(s) |
Arash Yazdani, Darren Dewitt, Wei Huang, Günther W.H. Höhne, Scott T. Misture, Javier E. Garay, David Kisailus, Olivia A. Graeve |
On-Site Speaker (Planned) |
Arash Yazdani |
Abstract Scope |
SAM2×5 is an amorphous steel with a chemical composition of Fe<sub>49.7</sub>Cr<sub>17.7</sub>Mn<sub>1.9</sub>Mo<sub>7.4</sub>W<sub>1.6</sub>B<sub>15.2</sub>C<sub>3.8</sub>Si<sub>2.4</sub>. In this study, dense samples were prepared using the spark plasma sintering technique at varying temperatures ranging from 615 to 675°C. Room and high temperature X-ray diffraction results showed that increasing the SPS temperature resulted in the devitrification of mainly carbide-based phases from the amorphous matrix. TEM observations showed that crystalline phases with sizes of less than 20 nm are uniformly distributed within the amorphous matrix. The crystallinity of the sintered samples was calculated using a novel differential scanning calorimetry-based technique, spanning from 21 wt.% to 82 wt.%. The average macro- and micro-compressive strength values ranged between 1.7 and 2.2 GPa, respectively, and were independent of sintering temperature. Moreover, brittle fracture along with formation of shear bands were identified as the failure mechanism. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |