Microstructure-Processing-Property-Relationship of Rapidly Solidified Al-Fe-(V, Si) Alloys

Ruangdaj Tongsri, Jane Minay, Richard Thackray, Richard Dashwood, Henry Mcshane

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Gas-atomised powders of Al-Fe-(V, Si) alloys exhibited microstructures consisting of several forms of icosahedral phase distributed in either supersaturated solid solution of α-Al matrix, or in intercellular/ dendritic regions depending on powder particle size. During processing of the powders by hot extrusion, the icosahedral phase particles transformed to more stable phase particles. Microstructures of extrudates produced from fine Al-Fe-V powder particles showed homogeneous precipitation of ultrafine needle-like particles in grains and at grain boundaries. This type of microstructure yielded high compressive strengths at room and elevated temperatures. In microstructures of extrudates produced from coarse Al-Fe-V powder particles, ultrafine needle-like particles were observed to coexist with globular particles. Because of large-size globular particles, low compressive strengths at room and elevated temperatures of the extrudates produced from coarse Al-Fe-V powder particles were obtained. The extrudates produced from fine Al-Fe-V-Si powder particles showed microstructures with homogeneous precipitation of spherical-like particles. In contrast, the extrudates produced from coarse Al-Fe-V-Si powder particles resulted in inhomogeneous microstructures, which were attributed to banded structures or donut-shaped aggregates of spherical-like particles. Because of inhomogeneous microstructures, low compressive strengths of the extrudates at room and elevated temperatures were obtained.

Original languageEnglish
Pages (from-to)25-31
Number of pages7
Issue number1
Publication statusPublished - 2004
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2004 Science Society of Thailand under Royal Patronage. All rights reserved.


The authors would like to thank the Department of Materials, Imperial College of Science, Technology and Medicine, UK., the Brite Euram Project, and the Royal Thai Government.


  • microstructure
  • processing
  • property
  • rapidly solidified Al-Fe-(V
  • Si) alloys.

ASJC Scopus subject areas

  • General


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