Bulk metallic glass composite with good tensile ductility, high strength and large elastic strain limit

• DOI: 10.1038/srep05302
• Publication Date: 2014-06-16T13:22:36Z
• Authors: Fu-Fa Wu; K. C. Chan; Song-Shan Jiang; Shun-Hua Chen; Gang Wang
• Keywords: Ductility (Earth science); Strain hardening exponent; Fatigue limit

Bulk metallic glasses exhibit high strength and large elastic strain limit but have no tensile ductility. However, bulk glass composites reinforced by in-situ dendrites possess significantly improved toughness at the expense of limit. Here, we report a composite with strong strain-hardening capability It was found that, plastic predeformation, can both under tension. These unique mechanical properties are attributed to reversible B2↔B19' phase transformation plastic-predeformation-induced complicated stress state in matrix second phase. findings significant for design application excellent properties.