Elastic Moduli Inheritance and Weakest Link in Bulk Metallic Glasses

Journal Article · Sat Dec 31 23:00:00 EST 2011 · Physical Review Letters

OSTI ID:1042817

Stoica, Alexandru Dan ^[1]; Wang, Xun-Li ^[1]; Lu, Z. P. ^[2]; Clausen, Bjorn ^[3]; Brown, Donald ^[3]

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1. ORNL
2. University of Science and Technology, Beijing
3. Los Alamos National Laboratory (LANL)

We show that a variety of bulk metallic glasses (BMGs) inherit their Young s modulus and shear modulus from the solvent components. This is attributed to preferential straining of locally solvent-rich configurations among tightly bonded atomic clusters, which constitute the weakest link in an amorphous structure. This aspect of inhomogeneous deformation, also revealed by our in-situ neutron diffraction studies of an elastically deformed BMG, suggests a scenario of rubber-like viscoelasticity owing to a hierarchy of atomic bonds in BMGs.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1042817
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 8 Vol. 108; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ATOMIC CLUSTERS
DEFORMATION
METALLIC GLASSES
NEUTRON DIFFRACTION
SHEAR
SOLVENTS
amorphous
deformation
elasiticity