1. Ductile Zr-Based Bulk Metallic Glasses by Controlling Heterogeneous Microstructure from Phase Competition Strategy.
- Author
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Cheng, J. L., Wang, J. J., Rui, J. X., Yun, Y. L., Zhao, W., and Li, F.
- Subjects
COPPER-titanium alloys ,METALLIC glasses ,MICROSTRUCTURE ,AMORPHOUS substances ,ALLOYS ,DUCTILITY - Abstract
In this paper, we prepare the alloys of Zr
41.2 Ti13.8 Cu12.5 Ni10 Be22.5 , Zr44.4 Ti14.8 Cu14.3 Ni11.5 Be15 , and Zr38 Ti12.7 Cu9.6 Ni7.7 Be32 to show the effects of alloy composition on the inhomogeneity structures and mechanical properties of Zr-based bulk metallic glasses (BMGs). Compared with the best glass former Zr41.2 Ti13.8 Cu12.5 Ni10 Be22.5 , some nanoscale inhomogeneity structures can be induced by shifting the compositions towards a primary phase in the alloys of Zr44.4 Ti14.8 Cu14.3 Ni11.5 Be15 and Zr38 Ti12.7 Cu9.6 Ni7.7 Be32 . The room temperature compression tests reveal that theBMGs contained nanoscale inhomogeneity structures exhibit superior mechanical properties with the high strength of 1780 MPa and especially a remarkable plastic strain of over 9%. These findings provide a new perspective to enhance the ductility of BMGs by introducing nanoscale inhomogeneity structures based on the phase competition strategy. [ABSTRACT FROM AUTHOR]- Published
- 2019
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