한국분말재료학회지 (Journal of Powder Materials)

  • 제15권2호
  • /
  • Pages.142-147
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  • 2008
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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가스분무 공정에 의한 고강도 과공정 AI-Si 합금 분말의 제조 및 특성연구 II. 압출재 제조 및 기계적 특성

Fabrication and Properties of High Strength Hypereutectic AI-Si Powders by a Gas Atomization Process II. Extrusion and Mechanical Properties

  • 김용진 (한국기계연구원 부설 재료기술연구소 분말재료연구센터) ;
  • 김진천 (울산대학교 첨단소재공학부)
  • Kim, Yong-Jin (Department of Powder Materials Research, Korea Institute of Materials Science) ;
  • Kim, Jin-Chun (School of Materials Science and Engineering, University of Ulsan)
  • 발행 : 2008.04.28
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초록

The hypereutectic Al-20 wt%Si powders including some amount of Cu, Fe, Mg, Mn were prepared by a gas atomization process. In order to get highly densified Al-Si bulk specimens, the as-atomized and sieved powders were extruded at $500^{\circ}C$, Microstructure and tensile properties of the extruded Al-Si alloys were investigated in this study. Relative density of the extruded samples was over 98%. Ultimate tensile strength (UTS) in stress-strain curves of the extruded powders increased after T6 heat treatments. Elongation of the samples was also increased from 1.4% to 3.2%. The fracture surfaces of the tested pieces showed a fine microstructure and the average grain size was about $1{\mu}m$.

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참고문헌

  1. Aluminum Industry Technology Roadmap, the Aluminum Association, Washington, (2003)
  2. J. M. Torralba, C. E. da Costa, F. Velasco: J. Materials Processing Technology, 133 (2003) 203 https://doi.org/10.1016/S0924-0136(02)00234-0
  3. Automotive Light weighting Materials, FY 2002 Progress Report, (2002)
  4. Z. J. Huang, B. Yang, H. Cui and J. S. Zhang: Materials Science and Engineering, A 351 (2003) 15
  5. J.-C. Kim, Yoshinori Nishida, H. Arima and Teiichi Ando: Materials Letters, 57 (2003) 1689 https://doi.org/10.1016/S0167-577X(02)01053-4
  6. H. Yamagata: Materials Science Forum, 797 (1999) 304
  7. K. H. Min, D. G. Kim, S. Y. Chang, T. W. Lim and Y. D. Kim: J. Korean Powder Metall. Inst., 10 (2003) 40 (Korean) https://doi.org/10.4150/KPMI.2003.10.1.040
  8. M. S. Gong, E. T. Bae, K. H. Min, Panyu, S. Y. Chang and Y. D. Kim: J. Korean Powder Metall. Inst., 11 (2004) 69 (Korean) https://doi.org/10.4150/KPMI.2004.11.1.069
  9. Y. J. Kim and J. C. Kim: J. Korean Powder Metall. Inst., 12 (2005) 296 (Korean) https://doi.org/10.4150/KPMI.2005.12.4.296