Journal of Materials Science

, Volume 30, Issue 14, pp 3680–3689 | Cite as

The structure of a rapidly solidified Al-Fe-Ti-C alloy

  • X. C. Tong
  • N. F. Shen
  • B. C. Liu


The microstructures of melt-spun Al-2.03 Fe-0.46 Ti-0.35 C (at %) superheated to 1523 K (ribbon I), and 1673 K (ribbon II), respectively, before quenching, have been characterized using analytical electron microscopy and X-ray diffraction. A duplex microstructure has been observed for ribbon I, consisting of a microcellular region, across a sharp transition, followed by a coarser cellular or dendritic structure. The intercellular phases consisted mostly of Al6Fe (few of Al3Fe) and the dispersed TiC particles distributed in the α-Al matrix with an exact orientation relationship. However, the microstructure of ribbon II comprised uniform, fine-scale dispersions of Al6Fe phase in α-Al grains, and larger size, elongated amorphous phase particles located along the grain boundaries, and approximately 0.46 at % Ti and 0.35 at % C dissolved in the α-Al matrix. During the annealing of ribbon II, the amorphous phase transformed to αT-AlFeSi phase, the Al6Fe dispersoids grew upwards and Al3Fe, TiC particles precipitated in the α-Al matrix. TiC phase formed both in ribbon I and in annealed ribbon II all had an atomic composition of TiC0.79 (the nominal atomic percent ratio for the alloy \(X_C /X_{T_{_j } } \) was 0.74) and a lattice parameter of 0.424 nm. Moreover, there is a cube-cube orientation relationship between TiC and α-Al matrix with a disregistry δ=0.049. In addition, the solidification characteristics of rapid solidification processing (RSP) Al-Fe-Ti-C alloy and mechanism of TiC formation have been discussed.


Amorphous Phase Orientation Relationship Al3Fe Atomic Composition Analytical Electron 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • X. C. Tong
    • 1
  • N. F. Shen
    • 1
  • B. C. Liu
    • 2
  1. 1.Research Centre for MaterialsZhengzhou Institute of TechnologyZhengzhouPeople’s Republic of China
  2. 2.Department of Mechanical EngineeringTsinghua UniversityBeijingPeople’s Republic of China

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