Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 685, Issue -, Pages 322-330Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2016.05.290
Keywords
Bulk metallic glass composite; Intrinsic properties; Work-hardening; Shear bands; Ti-based alloy
Categories
Funding
- Natural Science Foundation of China [51371149]
- Huo Yingdong Young Teacher Fund [151048]
- Aeronautical Science Foundation of China [2015ZF53066]
- Free Research Fund of State Key Lab. of Solidification Processing [92-QZ-2014]
- project of Shaanxi Young Stars of Science and Technology [2015KJXX-10]
- National Basic Research Program of China (973 Program) [2011CB610403]
- National Science Funds for Distinguished Young Scientists [51125002]
- Fundamental Research Funds for the Central Universities [3102015BJ(II) CG005]
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Bulk metallic glass (BMG) composites have demonstrated enormous potential for improved ductility and toughness over the traditional BMGs by in-situ formed crystalline phase in glass-matrix, which brings about delocalized strain and can inhibit shear bands rapid propagation in glass-matrix. However, an early onset of necking after yielding arises upon tension loading process. Enhancing work-hardening of bulk metallic glass (BMG) composites is therefore vitally important for practical applications. By tailoring the intrinsic properties of a Ti47Zr25Nb6Cu5Be17 BMG composite with an addition of Sn to reduce the shear and the elastic modulus of dendrite-phase, the current work gives full play to strain-induced work-hardening of dendrite phase and makes it succeed the completion with strain-induced work-softening of glass-matrix. Because of the significant enhancement of work-hardening by dislocation deformation in dendrite-phase, and the stabilized plastic flow in glass-matrix, large tensile ductility (tensile strain till necking epsilon(u) approximate to 10%) and high tensile strength (sigma(u) approximate to 1.5 GPa) are attained simultaneously by the Sn2 BMG composite. (C) 2016 Elsevier B.V. All rights reserved.
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