Is ductilization of intermetallics by nanostructure processing a possibility?

    Authors

    S. I. Hong;C. Suryanarayana

    Comments

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    Abbreviated Journal Title

    Mater. Trans.

    Keywords

    nanocrystalline materials; ductilization; strain rate sensitivity; fracture toughness; deformation homogeneity; DUCTILE FRACTURE-TOUGHNESS; GRAIN-SIZE; MECHANICAL-PROPERTIES; NANOCRYSTALLINE COPPER; DEFORMATION-BEHAVIOR; ROOM-TEMPERATURE; NANOPHASE TIO2; ALLOYS; CREEP; NANOINDENTATION; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering

    Abstract

    Nanocrystalline materials with a grain size of less than or equal to 100 nm are expected to be strong and hard and at the same time exhibit improved ductility/fabricability in comparison to their coarse-grained counterparts. Even though this has been shown to be possible in some nanocrystalline ceramic materials, there have been concerns on the validity of these results because of inadequate densification of the samples. It has also been suggested that achievement of nanostructures may not be desirable to ductilize the intermetallics. This article presents an overview of the fracture behavior of materials as a function of grain size, and shows that based on the observations that the strain-rate sensitivity and fracture toughness of nanostructured materials are higher than in their coarse-grained counterparts, achievement of nanocrystallinity in materials (including intermetallics) can lead to improved ductility and hence is a profitable route to investigate.

    Journal Title

    Materials Transactions

    Volume

    42

    Issue/Number

    3

    Publication Date

    1-1-2001

    Document Type

    Article

    Language

    English

    First Page

    502

    Last Page

    508

    WOS Identifier

    WOS:000168293500030

    ISSN

    1345-9678

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