Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
권호 표지
DOI QR코드

DOI QR Code

Consolidation of Rapidly Solidified Al-20 wt％ Si Alloy Powders Using Equal Channel Angular Pressing

급속응고 Al-20 wt% Si 합금 분말의 ECAP를 통한 고형화

  • 윤승채 (충남대학교 금속공학과) ;
  • 홍순직 (University of Central Florida, 기계·재료·항공공학) ;
  • 서민홍 (충남대학교 금속공학) ;
  • 정영기 (충남대학교 금속공학) ;
  • 김형섭 (충남대학교 금속공학과)
  • Published : 2004.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, bottom-up type powder processing and top-down type SPD (severe plastic deformation) approaches were combined in order to achieve both full density and grain refinement of Al-20 wt% Si powders without grain growth, which was considered as a bottle neck of the bottom-up method using the conventional powder metallurgy of compaction and sintering. ECAP (Equal channel angular pressing), one of the most promising method in SPD, was used for the powder consolidation. The powder ECAP processing with 1, 2, 4 and 8 passes was conducted for 10$0^{\circ}C$ and 20$0^{\circ}C$ It was found by microhardness, compression tests and micro-structure characterization that high mechanical strength could be achieved effectively as a result of the well bonded powder contact surface during ECAP process. The SPD processing of powders is a viable method to achieve both fully density and nanostructured materials.

Keywords

References

  1. Mater. Sci. Eng. v.A346 G.Wang;S.D.Wu;L.Zuo;C.Esling;Z.G.Wang;G.Y.Li
  2. Acta Metall v.51 C.Xu;M.Furukawa;Z.Horita;M.Nemoto;T.G.Langdon
  3. Prog. Metal. Sci. v.33 H.Gleiter https://doi.org/10.1016/0079-6425(89)90001-7
  4. J. Kor. Inst. Met. Mater. v.40 T.S.Kim;B.S.Chun
  5. Scripta Mater. v.35 Y.Iwahashi;J.Wang;Z.Horita;M.Nemoto;T.G.Langdon https://doi.org/10.1016/1359-6462(96)00107-8
  6. Prog. Mater. Sci. v.45 R.Z.Valiev;R.K.Islamgaliev;I.V.Alexandrov https://doi.org/10.1016/S0079-6425(99)00007-9
  7. Scripta Mater. v.41 A.Shan;I.Moon;H.S.Ko;J.W.Park https://doi.org/10.1016/S1359-6462(99)00188-8
  8. Acta Metall. Meter. v.50 R.Ueji;T.Tsuji;Y.Minamino;Y.Koisumi https://doi.org/10.1016/S1359-6454(02)00260-4
  9. J. Mater. Res. v.16 H.S.Kim;S.I.Hong;M.H.Seo https://doi.org/10.1557/JMR.2001.0113
  10. Acta Mater. v.44 J.Wang;Y.Iwahashi;Z.Horita;M.Furukawa;M.Nemoto;R.Z.Valiev;T.G.Langdon https://doi.org/10.1016/1359-6454(95)00395-9
  11. Acta Metall, Mater. v.42 R.Z.Valiev;E.V.Kozlov;Y.F.Ivanov;J.Lian;A.A.Nazarov;B.Baudelet https://doi.org/10.1016/0956-7151(94)90326-3
  12. Mater. Sci Forum v.243-245 M.Mabuchi;H.Iwasaki;K.Higashi https://doi.org/10.4028/www.scientific.net/MSF.243-245.547
  13. Mater. Sci. Eng. v.A197 V.M.Segal
  14. Mater. Sci. Forum v.243-245 R.Z.Valiev https://doi.org/10.4028/www.scientific.net/MSF.243-245.207
  15. Scripta Metall. Mater. v.33 S.L.Semiatin;V.M.Segal;R.L.Goetz;R.E.Goforth;T.Hartwig https://doi.org/10.1016/0956-716X(95)00264-V
  16. Scripta Mater. v.46 B.S.Moon;H.S.Kim;S.I.Hong https://doi.org/10.1016/S1359-6462(01)01209-X
  17. Mater. Sci. Eng. v.A315 H.S.Kim
  18. 충남대학교 석사학위 논문 윤승채
  19. J. Kor. Powder Metall. Inst. v.11 S.C.Yoon;S.J.Hong;M.H.Seo;Q.Pham;H.S.Kim https://doi.org/10.4150/KPMI.2004.11.2.097
  20. J. Mat. Sci. v.37 J.Wang;S.B.Kang;H.W.Kim;Z.Horita https://doi.org/10.1023/A:1021048202055
  21. J. Non-Cryst. Solids v.317 J.Robertson;J.T.Im;I.Karaman;K.T.Hartwig;I.E.Anderson https://doi.org/10.1016/S0022-3093(02)01995-6

Cited by

  1. Analysis of Densification Behavior of Nano Cu Powders during Cold Isostatic Pressing vol.11, pp.4, 2004, https://doi.org/10.4150/KPMI.2004.11.4.341
  2. Ultrafine Grained Cu-diamond Composites using High Pressure Torsion vol.19, pp.3, 2012, https://doi.org/10.4150/KPMI.2012.19.3.204