期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 749, 期 -, 页码 262-267出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.03.285
关键词
Metallic glasses; Mechanical spectroscopy; Structural heterogeneity; Mechanical properties
资金
- NSFC [51611130120, 11772257, 11572249]
- Fundamental Research Funds for the Central Universities [3102017HQZZ012]
- Natural Science Foundation of Shaanxi Province [2016JM5009]
- Shaanxi Province Postdoctoral Scientific Research Projects
- Astronautics Supporting Technology Foundation of China
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201608]
Dynamic mechanical relaxation behavior of (Zr55Cu30Ni5Al10)(100-x)Fe-x (x = 0, 1 and 2) bulk metallic glasses was investigated by mechanical spectroscopy. It is found that the main a relaxation of the Zr-based metallic glasses can be well described by the Kohlrausch-Williams-Watts (KWW) function. With the increasing of micro-alloying element content, i.e. iron, the value of Kohlrausch exponent beta(KWW) diminishes for the (Zr55Cu30Ni5Al10)(100-x)Fe-x (x = 0, 1 and 2) metallic glass, whereas the characteristic relaxation time increases. In the framework of the quasi-point defects theory, the physical correlation factor chi increases with higher iron content below the glass transition temperature T-g. In addition, the parameter a of the quasi-point defect theory can describe the degree of deviations from the Arrhenius law. Based on the theoretical and experimental analysis, it is implied that structural heterogeneity of the Zr55Cu30Ni5Al10 bulk metallic glass could be tailored through minor addition of the iron element. (C) 2018 Elsevier B.V. All rights reserved.
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