Oxygen effects on plastic deformation of a Zr-based bulk metallic glass

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.2828981· OSTI ID:931096

Lu, Zhao Ping ^[1]; Bei, Hongbin ^[2]; Wu, Y. ^[1]; George, Easo P ^[2]; Liu, Chain T ^[2]; Chen, G. L. ^[1]

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1. University of Science and Technology, Beijing
2. ORNL

Starting with Zr of two different purities, Zr-based bulk metallic glasses (BMGs) with a nominal composition of Zr{sub 62}Cu{sub 15.5}Ni{sub 12.5}Al{sub 10} were prepared having oxygen concentrations of about 3900 and 920 at. ppm, respectively. Uniaxial compression tests showed that the BMG containing the higher level of oxygen has a higher yield strength and is capable of undergoing much less plastic deformation than that containing the lower level of oxygen. It appears that oxygen suppresses the formation of multiple shear bands but leads to an inability to sustain shear-band propagation, thus, changing the failure mode from relatively ductile to catastrophic brittle fracture.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931096
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 1 Vol. 92; ISSN 0003-6951; ISSN APPLAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COMPRESSION
DEFORMATION
GLASS
METALLIC GLASSES
OXYGEN
PLASTICS
SHEAR
YIELD STRENGTH