J. Mater. Sci. Technol. ›› 1999, Vol. 15 ›› Issue (05): 469-472.

• 论文 • 上一篇    下一篇

Precipitation of α Phase in the Massive and Feathery Structures in TiAl Alloys during Aging in the Single α Field

Weijun ZHANG， Guoliang CHEN   

  • 收稿日期:1998-08-31 修回日期:1998-12-12 出版日期:1999-09-28 发布日期:2009-10-10

Precipitation of α Phase in the Massive and Feathery Structures in TiAl Alloys during Aging in the Single α Field

Weijun ZHANG， Guoliang CHEN   

  1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
  • Received:1998-08-31 Revised:1998-12-12 Online:1999-09-28 Published:2009-10-10
  • Contact: Weijun ZHANG

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Abstract: Precipitation of α-phase in massive and feathery microstructures was studied during aging in the single α field. It was found that the α-phase mainly precipitated along the γ-plate interfaces as laths in the feathery structure, while it nucleated at various sites in the massive structure in the form of particles and dominantly as plates. Precipitation of α-plates in the massive structure occurred by the diffusional ledge mechanism. The γm→α reaction proceeded by the growth of previously nucleated α-precipitates, and chiefly by the development of new α-plates.

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