Correlation between atomic structure evolution and strength in a bulk metallic glass at cryogenic temperature.
A model Zr41.25Ti13.75Ni10Cu12.5Be22.5 (at.%) bulk metallic glass (BMG) is selected to explore the structural evolution on the atomic scale with decreasing temperature down to cryogenic level using high energy X-ray synchrotron radiation. We discover a close correlation between the atomic structure evolution and the strength of the BMG and find out that the activation energy increment of the concordantly atomic shifting at lower temperature is the main factor influencing the strength. Our results might provide a fundamental understanding of the atomic-scale structure evolution and may bridge the gap between the atomic-scale physics and the macro-scale fracture strength for BMGs.
Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China.
J
J
Tan
Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China.
G
G
Wang
Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China.
Z Y
ZY
Liu
HASYLAB at DESY, Notkestr. 85, D-22603 Hamburg, Germany.
J
J
Bednarčík
Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China.
Y L
YL
Gao
Laboratory for Microstructures, Shanghai University, 200444 Shanghai, China.
Q J
QJ
Zhai
IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany.
N
N
Mattern
1] IFW Dresden, Institute for Complex Materials, D-01069 Dresden, Germany [2] TU Dresden, Institute of Materials Science, D-01062 Dresden, Germany.
J
J
Eckert