Metallurgical Transactions A

, Volume 20, Issue 12, pp 2841–2845

The microstructure of rapidly solidified Ti-Fe melt-spun ribbons

  • I. Levi
  • D. Shechtman
Solidification

Abstract

Ti-Fe binary alloys were rapidly solidified by the melt-spinning technique, and four compositions were examined: Ti-5 wt pct Fe, which is the critical composition for theβ to ω athermal transformation; Ti-10 wt pct Fe, which represents a hypoeutectoid composition; the eutectoid composition Ti-15 wt pct Fe; and Ti-20 wt pct Fe, as an example of a hypereutectoid alloy. The Ti-5 wt pct Fe rapidly solidified ribbons are composed of two different structures. The first consists of α′-martensite plates inβ matrix and the second, athermal ω particles inβ matrix. The Ti-10, 15, and 20 wt pct Fe alloys are also composed of two structures. These areβ grains and isothermal-like ω particles inβ matrix. A solidification model is suggested which explains the existence of two different microstructures at the same composition and the for-mation of two kinds of ω particles.

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Copyright information

© The Metallurgical Society of AIME 1989

Authors and Affiliations

  • I. Levi
    • 1
  • D. Shechtman
    • 1
  1. 1.Department of Materials EngineeringTechnionIsrael

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