期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 820, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.153165
关键词
Bulk metallic glass composite; Long-term room-temperature aging treatment; High-resolution transmission electron microscopy; Auto-correlation function; Mechanical property
资金
- National Natural Science Foundation of China [51871076, 51671070, 51827801, 51671067, 51671071]
- State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, China [AWJ-16-Z02]
- China Scholarship Council
- DFG [PA 2275/4-1, PA 2275/6-1, PA 2275/2-1]
In this work, a long-term room-temperature aging treatment of the order of years is applied to a B2 phase-reinforced CuZr-based bulk metallic glass composite (BMGC). Presumably governed by residual stress, B19' CuZr martensitic phase gradually precipitates in the crystals after such long-term aging, while structural relaxation takes place in the glassy matrix, which finally induces precipitation of Cu10Zr7 nanocrystals. Tensile tests prove that these time-dependent structural changes have a measurable effect on deformation behaviors of BMGC. The findings are helpful for understanding the thermodynamic stability and the kinetics of structural evolution of metastable alloys and have useful implications for tailoring the structure and mechanical behavior of BMGCs. (C) 2019 Elsevier B.V. All rights reserved.
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