한국재료학회지 (Korean Journal of Materials Research)

  • 제19권5호
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  • Pages.276-280
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  • 2009
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  • 1225-0562(pISSN)
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  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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비정질 합금의 전단띠 내부 구조변화 해석을 통한 소성의 이해

Understanding the Plasticity of Amorphous Alloys Via the Interpretation of Structural Evolution Inside a Shear Band

  • 이창면 (고려대학교 신소재공학과) ;
  • 박경원 (고려대학교 신소재공학과) ;
  • 이병주 (POSTECH 신소재공학과) ;
  • 심재혁 (한국과학기술연구원 재료기술부) ;
  • 이재철 (고려대학교 신소재공학과)
  • Lee, Chang-Myeon (Department of Materials Science and Engineering, Korea University) ;
  • Park, Kyoung-Won (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Byeong-Joo (Department of Materials Science and Engineering, POSTECH) ;
  • Shim, Jae-Hyeok (Division of Advanced Materials, KIST) ;
  • Lee, Jae-Chul (Department of Materials Science and Engineering, Korea University)
  • 발행 : 2009.05.27
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초록

The effect of the initial packing structure on the plasticity of amorphous alloys was investigated by tracing the structural evolution of the amorphous solid inside a shear band. According to the molecular dynamics simulations, the structural evolution of the amorphous solids inside the shear band was more abrupt in the alloy with a higher initial packing density. Such a difference in the structural evolution within the shear band observed from the amorphous alloys with different initial packing density is believed to cause different degrees of shear localization, providing an answer to the fundamental question of why amorphous alloys show different plasticity. We clarify the structural origin of the plasticity of bulk amorphous alloys by exploring the microstructural aspects in view of the structural disordering, disorder-induced softening, and shear localization using molecular dynamics simulations based on the recently developed MEAM (modified embedded atom method) potential.

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참고문헌

  1. Q. P. Cao, J. F. Li, Y. H. Zhou, A. Horsewell and J. Z. Jiang, Appl. Phys. Lett., 87, 101901 (2005) https://doi.org/10.1063/1.2037858
  2. J. S. Park, H. K. Lim, J. H. Kim, H. J. Chang, W. T. Kim, D. H. Kim and E. Fleury, J. Non-Cryst. Solids, 351, 2142 (2005) https://doi.org/10.1016/j.jnoncrysol.2005.04.070
  3. K. W. Park, C. M. Lee, M. Wakeda, Y. Shibutani, M. L. Falk and J. C. Lee, Acta Mater., 56, 5440 (2008) https://doi.org/10.1016/j.actamat.2008.07.033
  4. C. M. Lee, S. Y. Shin, N. J. Kim and J. C. Lee, J. Kor. Inst. Met. & Mater., 45, 203 (2007)
  5. K. H. Kim, H. J. Kim and J. C. Lee, J. Mater. Res., 22, 2558 (2007) https://doi.org/10.1557/jmr.2007.0327
  6. J. C. Lee, K. W. Park, K. H. Kim, E. Fleury, B. J. Lee, M. Wakeda and Y. Shibutani, J. Mater. Res., 22, 3087 (2007) https://doi.org/10.1557/jmr.2007.0382
  7. Y. Q. Cheng, A. J. Cao, H. W. Sheng and E. Ma, Acta Mater. 56, 5263 (2008) https://doi.org/10.1016/j.actamat.2008.07.011
  8. F. M. Richards, J. Mol. Biol. 82, 1 (1974) https://doi.org/10.1016/0022-2836(74)90570-1
  9. D. Xu, B. Lohwongwatana, G. Duan, W. L. Johnson and C. Garland, Acta Mater., 52, 2621 (2004) https://doi.org/10.1016/j.actamat.2004.02.009
  10. D. Wang, Y. Li, B. B. Sun, M. L. Sui, K. Lu and E. Ma, Appl. Phys. Lett., 84, 4029 (2004) https://doi.org/10.1063/1.1751219
  11. O. J. Kwon, Y. C. Kim, Y. K. Lee and E. Fleury, Met. Mater. Inter., 12, 207 (2006) https://doi.org/10.1007/BF03027532
  12. O. J. Kwon, Y. K. Lee, S. O. Park, J. C. Lee, Y. C. Kim and E. Fleury, Mater. Sci. Eng. A, 449, 169 (2007) 9:169
  13. M. Wakeda, Y. Shibutani, S. Ogata and J. Y. Park, Intermetallics, 15, 139 (2007) https://doi.org/10.1016/j.intermet.2006.04.002
  14. Y. M. Kim and B. J. Lee, J. Mater. Res. 23, 1095 (2008) https://doi.org/10.1557/jmr.2008.0130
  15. F. C. Frank, Proc. R. Soc. Lond., A215, 43 (1952) https://doi.org/10.1098/rspa.1952.0194