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Formation of in-situ dispersion strengthening particles in cast FeCrAl alloy

  • Shuo Feng
  • Wei Han
  • He-li Luo
  • G. Karin
  • Chang-hai Li
Article

Abstract

In order to fabricate dispersion strengthened alloys strengthened by submicron-sized or nano-sized stable particles through casting routes, understanding of the formation process of dispersion strengthening particles in metal melt is of significance. Thus, nano NiO and TiO3 particles were selected as reactant to form in-situ dispersion strengthening oxide particles in Fe20Cr5Al alloy. Nano NiO and TiO2 particle powder was separately dispersed into nano Ni powder first. The loose mixed nano powder was added in Fe20Cr5Al alloy melt when pouring the melt into mold. The study shows that nano NiO particles were not as effective as nano TiO2 particles in forming dispersion strengthening A12O3 particles. The final diameters of dispersion strengthening oxide particles arose from nano TiO2 particles were of submicron. The Brownian collision of particles had caused this coarsening.

Key words

in-situ particle dispersion strengthening particle formation cast FeCrAl alloy 

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References

  1. [1]
    Tjong S C, Ma Z Y. Microstructural and Mechanical Characteristics of in Situ Metal Matrix Composites [J]. Mater Sci Eng, 2000, 29: 49.CrossRefGoogle Scholar
  2. [2]
    Dolata-Grosz A, Sleziona J, Formanek B. Structure and Properties of Aluminium Cast Composites Strengthened by Dispersion Phases [J]. J Mater Proc Tech, 2006, 175: 192.CrossRefGoogle Scholar
  3. [3]
    Hasegawa M, Osawa M. Oxide Dispersion Strengthened Nickel-Base Heat Resistant Alloys by Means of the Spray Dispersion Method [J]. Metall Trans, 1985, 16A: 1043.CrossRefGoogle Scholar
  4. [4]
    YANG Yong, LAN Jie, LI Xiao-chun. Study on Bulk Aluminum Matrix Nanocomposite Fabricated by Ultrasonic Dispersion of Nano-Sized SiC Particles in Molten Aluminum Alloy [J]. Mater Sci Eng, 2004, 380A: 378.CrossRefGoogle Scholar
  5. [5]
    Hassan S F, Gupta M. Development of Nano-Y2O3 Containing Magnesium Nanocomposites Using Solidification Processing [J]. J Alloys and Compounds, 2007, 429: 176.CrossRefGoogle Scholar
  6. [6]
    Donachie M J, Donachie S J. Superalloys: A Technical Guide [M]. 2nd ed. Materials Park: ASM International, 2002.Google Scholar
  7. [7]
    ZHANG Bang-wen, LI Bao-wei, HE You-duo. Growth Kinetics of Single Inclusion in Molten Metal [J]. J Iron Steel Research, 2005, 17(6): 19 (in Chinese).Google Scholar
  8. [8]
    WANG Zhi-cheng. Thermodynamics and Statistical Physics [M]. Beijing: Higher Education Press, 2003 (in Chinese).Google Scholar
  9. [9]
    Myers D. Surfaces, Interfaces and Colloids-Principles and Applications [M]. New York: Wiley-VCH, 1999.CrossRefGoogle Scholar

Copyright information

© China Iron and Steel Research Institute Group 2010

Authors and Affiliations

  • Shuo Feng
    • 1
  • Wei Han
    • 2
  • He-li Luo
    • 1
  • G. Karin
    • 3
  • Chang-hai Li
    • 1
  1. 1.High Temperature Material Research InstituteCentral Iron and Steel Research InstituteBeijingChina
  2. 2.Group OfficeChina Iron and Steel Research GroupBeijingChina
  3. 3.Department of Materials Science and EngineeringChalmers University of TechnologyGothenburgSweden

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