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A Tem Survey On δ’/β’ Composite Precipitates in an Al-2.5%Li-0.15%Zr Alloy

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Statics and Dynamics of Alloy Phase Transformations

Part of the book series: NATO ASI Series ((NSSB,volume 319))

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Abstract

Al-Li based alloys offer a high technological potential in aerospace industry due to their high elastic modulus / density ratio1. The strength of these alloys is achieved by the homogeneously distributed metastable, coherent δ’ (Al3Li) precipitates with Ll2 ordered crystal structure. Due to small coherency strains involved, about 0.8%, δ’ form as spherical precipitates. Zr is added to Al-Li alloys to retard recrystallization and grain growth by the formation of metastable coherent β’ (Al3Zr) particles again with Ll2 ordered structure. Lattice parameters of δ’ and β’ are quite similar, 0.404 and 0.408 nm, respectively. Both phases exhibit cube/cube orientation relationship to the matrix.

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References

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Author information

Authors and Affiliations

  1. Metallurgical Engineering Department, Middle East Technical University, Ankara, Turkey

    A. Sakir Bor

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  1. A. Sakir Bor
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Editors and Affiliations

  1. Lawrence Livermore National Laboratory, Livermore, California, USA

    Patrice E. A. Turchi  & Antonios Gonis  & 

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© 1994 Springer Science+Business Media New York

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Sakir Bor, A. (1994). A Tem Survey On δ’/β’ Composite Precipitates in an Al-2.5%Li-0.15%Zr Alloy. In: Turchi, P.E.A., Gonis, A. (eds) Statics and Dynamics of Alloy Phase Transformations. NATO ASI Series, vol 319. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2476-2_17

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  • DOI: https://doi.org/10.1007/978-1-4615-2476-2_17

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6055-1

  • Online ISBN: 978-1-4615-2476-2

  • eBook Packages: Springer Book Archive

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