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Open AccessArticle

Martensitic Transformation and Plastic Deformation of TiCuNiZr-Based Bulk Metallic Glass Composites

1
School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China
2
Department of Physics, School of Science, Northwestern Polytechnical University, Xi’an 710072, China
3
Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, A-8700 Leoben, Austria
4
Department Materials Physics, Montanuniversität Leoben, A-8700 Leoben, Austria
*
Authors to whom correspondence should be addressed.
Metals 2018, 8(3), 196; https://doi.org/10.3390/met8030196
Received: 7 February 2018 / Revised: 15 March 2018 / Accepted: 16 March 2018 / Published: 20 March 2018
(This article belongs to the Special Issue Metallic Glasses: Pathways to Viable Applications)
In this study, the microstructural evolution and mechanical properties of TiCuNiZr-based bulk metallic glass (BMGs) composites were systematically investigated in order to optimize both the strength and the ductility of BMGs. By tailoring the glass-forming compositions, TiCuNiZr-based BMG composites with different volume fractions of B2 (Ti,Zr)(Cu,Ni) crystals precipitating in the glassy matrix exhibit not only macroscopic ductility but also high strength as well as work-hardening, which is due to the formation of multiple shear bands and martensitic transformation during deformation. Optimized mechanical properties can be achieved when the crystalline volume fraction is at least higher than 44 vol. %, which is attributed to the sizeable difference between Young’s moduli of the B2 (Ti,Zr)(Cu,Ni) crystals and the glassy matrix, and the precipitation of Ti2Cu intermetallic compounds at the B2 crystal boundaries. Our study provides a complementary understanding of how to tailor mechanical properties of TiCu-based BMG composites. View Full-Text
Keywords: bulk metallic glasses; composites; martensitic transformation; shear bands; composites; mechanical properties bulk metallic glasses; composites; martensitic transformation; shear bands; composites; mechanical properties
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MDPI and ACS Style

Sun, H.; Song, K.; Han, X.; Xing, H.; Li, X.; Wang, S.; Kim, J.T.; Chawake, N.; Maity, T.; Wang, L.; Eckert, J. Martensitic Transformation and Plastic Deformation of TiCuNiZr-Based Bulk Metallic Glass Composites. Metals 2018, 8, 196.

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