Preparation of High Strength and High Toughness Metal-Amorphous Composites by Ultra-High Speed Heat Treatment View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2016-2018

FUNDING AMOUNT

200000.0 CNY

ABSTRACT

Metallic glass composites, which is fabricated by in situ introducing second ductile crystals into the glassy matrix, has shown excellent mechanical properties at the room temperature and has been paid great attention in the field of metallic glasses. However, it is very difficult to use traditional preparation methods to effectively control the precipitation of second ductile crystals in the glassy matrix and to further improve mechanical properties of metallic glass composites, which has been a stumbling block for practical structural application. Therefore, the ultra-fast heating and chilling treatment is adapted to in situ fabricate high strong and ductile metallic glass composites in Fe-based and CuZr-based alloys. By controlling annealing process parameters, the formation of nano or micro scale ductile α-Fe in Fe-based alloys or B2 CuZr in CuZr-based alloys, and the content of free volume in glassy matrix can be effectively controlled, respectively. The present project could provide a new strategy to fabricate metallic glasses composites with good deformability. Furthermore, the crystallization kinetics of Fe-based and CuZr-based metallic glasses under ultra-fast heating conditions will be clarified. The changes of free volume in the glassy matrix under different heat treatment conditions will be clearly studied. The correlation between the microstructural features and mechanical properties of the present composites will be systematically investigated in order to provide a deep understanding of the formation and deformation mechanisms of the investigated composites. More... »

URL

http://output.nsfc.gov.cn/conclusionProject/a9ef58944f572225235f52abe57e73b5

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