Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4899124
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Funding
- National Nature Science Foundation of China [51301142]
- Fundamental Research Funds for the Central Universities [XDJK2014B027]
- China and Chongqing Postdoctoral Science Foundation [2014M562279, Xm2014004]
- Opening Project of State Key Laboratory of Powder Metallurgy
- Optical Engineering Key Laboratory of Chongqing Municipal Education Commission
- Shenzhen Key Laboratory of Special Functional Materials [T201304]
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Fe-based bulk metallic glasses (BMGs) typically exhibit ultrahigh strength but a poor ductility. Here, an Fe62Ni18P13C7 BMG with a super large plasticity of above 50% is reported. Such a discovery is guided by understanding a composition-strength-ductility map, in which most of Fe-based BMGs are classified into three types: FeC(B)-based, FeB-based, and FeP(C)-based. We demonstrate that the mechanical properties of the different types of BMGs are linked with their different physical properties. Among the three types of BMGs, the FeP(C)-based BMGs often possess a lower glass transition temperature, a lower shear modulus, and a higher Poisson's ratio, resulting in a lower shear flow barrier and a higher plasticity. Our findings provide a guideline in understanding the mechanical behavior of Fe-based BMGs. (C) 2014 AIP Publishing LLC.
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