2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 2: Dubois Intl. Symp. / Complex Metallic Systems
| Editors: | Kongoli F, Kobe S, Calin M, Dong C |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 130 pages |
| ISBN: | 978-1-987820-38-6 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Fe-based Bulk Metallic Glasses with Novel Mechanical Properties
Baolong Shen1;1SOUTHEAST UNIVERSITY, Nanjing, China;
Type of Paper: Invited
Id Paper: 424
Topic: 36
Abstract:
Fe-based bulk metallic glasses (BMGs) have been attracted great attention since the first synthesis in 1995 due to their unique magnetic and mechanical properties. In this talk, FeNiPC alloys with high strength and unprecedented compressive plasticity at room temperature, which have not been obtained in conventional Fe-based crystalline alloys, will be reported. The mechanism of ductile-to-brittle transition for Fe-based BMGs was also investigated. It was discovered that the ductile Fe-based BMG is composed of unique clusters mainly linked by less directional metal-metal bonds which are inclined to accommodate shear strain and absorbed energy in the front of the crack tip. This conclusion was further verified by the X-ray photoelectron spectroscopy and ultraviolet photoelectron spectroscopy experiments of brittle to ductile Fe-based glassy systems. The results also indicate a strong correlation between the p-d hybridization and plasticity, verifying that the transition from brittle to ductile is due to the change of bonding characteristics in atomic configurations.