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Effects of crystallization on mechanical behavior and corrosion performance of a ductile Zr68Al8Ni8Cu16 bulk metallic glass

Journal Article · · Journal of Non-Crystalline Solids
 [1];  [2];  [2];  [2];  [3];  [3];  [3]
  1. Fujian Univ. of Technology, Fuzhou (China); Univ. of Tennessee, Knoxville, TN (United States); Fujian Provincial Key Lab. of Advanced Materials Processing and Application, Fuzhou (China)
  2. Fujian Univ. of Technology, Fuzhou (China); Fujian Provincial Key Lab. of Advanced Materials Processing and Application, Fuzhou (China)
  3. Univ. of Tennessee, Knoxville, TN (United States)

Here, we studied the effects of heat treatment on the microstructures, crystallization kinetics, mechanical performance, and anti-corrosion behavior of a hypoeutectic Zr68Al8Ni8Cu16 bulk metallic glass (BMG). 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.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE; National Natural Science Foundation of China (NNSFC); Natural Science Foundation of Fujian Province; Fujian Univ. of Technology; Chinese Scholarship Council; National Science Foundation (NSF)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1761723
Journal Information:
Journal of Non-Crystalline Solids, Journal Name: Journal of Non-Crystalline Solids Journal Issue: n/a Vol. 529; ISSN 0022-3093
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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