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Vol.48, No.1, 1 ~ 8, 2010
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| Title |
| Fe-based Amorphous Alloy with High Strength and Toughness Synthesized based on nm-scale Phase Separation |
| 이광복 Kwang Bok Lee , 박경원 Kyoung Won Park , 이상호 Sang Ho Yi , 이재철 Jae Chul Lee |
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| Abstract |
| Experiments have demonstrated that the addition of a moderate amount of V to Fe52Co(20-x)B20Si4-Nb4Vx amorphous alloy enhances the plasticity of the alloy. In particular, Fe52Co17.5B20Si4Nb4V2.5 alloy withstood a maximum of 8.3% strain prior to fracture along with a strength exceeding 4.7 GPa. Energy dispersive x-ray spectroscopy conducted on the Fe52Co17.5B20Si4Nb4V2.5 alloy exhibited evidence of compositional modulation, indicating that nm-scale phase separation had occurred at local regions. In this study, the role played by nm-scale phase separation on the plasticity was investigated in terms of structural disordering and shear localization in order to better understand the structural origin of the enhanced plasticity shown by the developed alloy. |
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| Key Words |
| amorphous alloy, phase-separation, structural disordering, shear Localization, plasticity |
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