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Open AccessArticle

Ductile Zr-Based Bulk Metallic Glasses by Controlling Heterogeneous Microstructure from Phase Competition Strategy

by J.L. Cheng 1,2,*, J.J. Wang 1, J.X. Rui 1, Y. L. Yun 1, W. Zhao 1,2,3 and F. Li 4,*
1
School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China
2
Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 211167, China
3
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
4
School of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China
*
Authors to whom correspondence should be addressed.
Nanomaterials 2019, 9(12), 1728; https://doi.org/10.3390/nano9121728
Received: 4 November 2019 / Revised: 30 November 2019 / Accepted: 2 December 2019 / Published: 3 December 2019
In this paper, we prepare the alloys of Zr41.2Ti13.8Cu12.5Ni10Be22.5, Zr44.4Ti14.8Cu14.3Ni11.5Be15, and Zr38Ti12.7Cu9.6Ni7.7Be32 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 Zr41.2Ti13.8Cu12.5Ni10Be22.5, some nanoscale inhomogeneity structures can be induced by shifting the compositions towards a primary phase in the alloys of Zr44.4Ti14.8Cu14.3Ni11.5Be15 and Zr38Ti12.7Cu9.6Ni7.7Be32. 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.
Keywords: amorphous materials; deformation and fracture; ductility; phase competition amorphous materials; deformation and fracture; ductility; phase competition
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MDPI and ACS Style

Cheng, J.; Wang, J.; Rui, J.; Yun, Y.L.; Zhao, W.; Li, F. Ductile Zr-Based Bulk Metallic Glasses by Controlling Heterogeneous Microstructure from Phase Competition Strategy. Nanomaterials 2019, 9, 1728.

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