Size Effect Suppresses Brittle Failure in Hollow Cu60Zr40 Metallic Glass Nanolattices Deformed at Cryogenic Temperatures.
To harness "smaller is more ductile" behavior emergent at nanoscale and to proliferate it onto materials with macroscale dimensions, we produced hollow-tube Cu60Zr40 metallic glass nanolattices with the layer thicknesses of 120, 60, and 20 nm. They exhibit unique transitions in deformation mode with tube-wall thickness and temperature. Molecular dynamics simulations and analytical models were used to interpret these unique transitions in terms of size effects on the plasticity of metallic glasses and elastic instability.
Division of Engineering and Applied Science, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States.|Department of Materials Science and Engineering, Institute of Materials Science, University of Connecticut , Unit 3136, 97 North Eagleville Road, Storrs, Connecticut 06269-3136, United States.
Seok-Woo
SW
Lee
Institute of High Performance Computing, A*STAR, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore.
Mehdi
M
Jafary-Zadeh
Division of Engineering and Applied Science, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States.
David Z
DZ
Chen
Institute of High Performance Computing, A*STAR, 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore.
Yong-Wei
YW
Zhang
Division of Engineering and Applied Science, California Institute of Technology , 1200 E California Blvd, Pasadena, California 91125, United States.
Julia R
JR
Greer
Metallic glass; buckling; elasticity; nanolattice; plasticity