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Formation of Submicrocrystalline Structure in TiAl and Ti3Al intermetallics via Hot Working

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Investigations and Applications of Severe Plastic Deformation

Part of the book series: NATO Science Series ((ASHT,volume 80))

Abstract

A method based on initiation of dynamic recrystallization (DRX) during hot working has been developed to produce a submicrocrystalline (SMC) structure (d < 1 µm) in massive work-pieces of hard-to-deform materials, like titanium aluminides, The method involves continuous grain refinement due to dynamic recrystallization at a decreasing temperature. A microstructure with a grain size of 0.1 to 0.4 µm and no porosity was produced in different TiAl and Ti3Al based alloys. Partial disordering was detected in a Ti3Al alloy with the SMC structure. The grain refinement hardened the intermetallic alloys at room temperature (RT). In a fully ordered Ti3Al alloy RT ductility increased when the grain size decreased, while the ductility of a partially disordered SMC Ti3Al and TiAl alloys was close to zero.

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Authors and Affiliations

  1. Institute for Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, 450001, Russia

    G. Salishchev, R. Imayev, V. Imayev, N. Gabdullin, M. Shagiev & A. Kuznetsov

  2. Institute for Materials and Advanced Processes, University of Idaho, Moscow, Idaho, 83844-3026, USA

    O. N. Senkov & F. H. Froes

Authors
  1. G. Salishchev
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  2. R. Imayev
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  3. V. Imayev
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  4. N. Gabdullin
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  5. M. Shagiev
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  6. A. Kuznetsov
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  7. O. N. Senkov
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  8. F. H. Froes
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Editor information

Editors and Affiliations

  1. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, NM, USA

    Terry C. Lowe

  2. Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, Ufa, Russia

    Ruslan Z. Valiev

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© 2000 Springer Science+Business Media Dordrecht

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Salishchev, G. et al. (2000). Formation of Submicrocrystalline Structure in TiAl and Ti3Al intermetallics via Hot Working. In: Lowe, T.C., Valiev, R.Z. (eds) Investigations and Applications of Severe Plastic Deformation. NATO Science Series, vol 80. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4062-1_7

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  • DOI: https://doi.org/10.1007/978-94-011-4062-1_7

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-7923-6281-4

  • Online ISBN: 978-94-011-4062-1

  • eBook Packages: Springer Book Archive

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