New Class of Plastic Bulk Metallic Glass

Journal Article · Fri Feb 22 00:00:00 EST 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.075501· OSTI ID:21024797

Chen, L Y; Jiang, Q K; Wang, X D; Cao, Q P; Zeng, Y W; Jiang, J Z ^[1]; Fu, Z D; Zhang, S L ^[2]; Zhang, G Q ^[1]; Hao, X P; Wang, B Y ^[3]; Franz, H ^[4]; Liu, Y G; Xie, H S ^[5]

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1. International Center for New-Structured Materials (ICNSM), Zhejiang University and Laboratory of New-Structured Materials, Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027 (China)
2. Department of Physics, Peking University, Beijing 100871 (China)
3. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049 (China)
4. HASYLAB at DESY, Notkestrasse 85, D-22603 Hamburg (Germany)
5. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 (China)

An intrinsic plastic Cu{sub 45}Zr{sub 46}Al{sub 7}Ti{sub 2} bulk metallic glass (BMG) with high strength and superior compressive plastic strain of up to 32.5% was successfully fabricated by copper mold casting. The superior compressive plastic strain was attributed to a large amount of randomly distributed free volume induced by Ti minor alloying, which results in extensive shear band formation, branching, interaction and self-healing of minor cracks. The mechanism of plasticity presented here suggests that the creation of a large amount of free volume in BMGs by minor alloying or other methods might be a promising new way to enhance the plasticity of BMGs.

• OSTI ID: 21024797
• Journal Information: Physical Review Letters, Vol. 100, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.100.075501; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BRANCHING RATIO
CASTING MOLDS
COPPER
COPPER ALLOYS
CRACKS
INTERMETALLIC COMPOUNDS
METALLIC GLASSES
PLASTICITY
TITANIUM ALLOYS
ZIRCONIUM ALLOYS