Abstract
The effects of heat treatment on the microstructures, crystallization kinetics, mechanical performance, and anti-corrosion behavior of a hypoeutectic Zr68Al8Ni8Cu16 bulk metallic glass (BMG) were studied. Through annealing, the precipitated phases were crystalline Zr2Cu and Zr2Ni. The total crystallinity was determined to be 10% and 77% for the samples annealed at 673 K and 713 K, respectively. The partial crystallization of the alloy leads to a dramatic deterioration in the ductility as compared to the as-cast BMG. Furthermore, the decrease in the ductility was accompanied by an increase in the crystallinity. The as-cast Zr-based BMG exhibited a greater corrosion resistance in the HCl solution than that of the annealed alloy. The depletion in the Zr and Al cation fractions of the surface oxidation film, which resulted from the precipitation of reactive nanocrystalline phases from the glassy matrix, is responsible for the reduced corrosion resistance.
Original language | English |
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Article number | 119782 |
Journal | Journal of Non-Crystalline Solids |
Volume | 529 |
DOIs | |
State | Published - Feb 1 2020 |
Externally published | Yes |
Funding
The present work was supported by the National Natural Science Foundation of China ( 51401053 and 21701024 ), the Natural Science Foundation of Fujian Province ( 2018J01629 ), the New Century Excellent Talents in University of Fujian Province ( GY-Z17066 ), and the Scientific Research Project of Fujian University of Technology ( GY-Z17152 ). N.B. Hua acknowledged the China Scholarship Council (CSC) for sponsoring his visit to the University of Tennessee (UT) where the present work was partly conducted. Y.X. Ye would like to acknowledge funding from the State of Tennessee and Tennessee Higher Education Commission (THEC) through their support of the Center of Materials Processing (CMP). PKL thanks the support from the National Science Foundation ( DMR-1611180 and 1809640 ) with the program directors, Drs. G. Shiflet and D. Farkas.
Keywords
- Annealing
- Bulk metallic glass
- Corrosion behavior
- Crystallization
- Mechanical property