Low-temperature superplasticity in ultrafine-grained Ti5Si3-TiAl composites

    Authors

    T. Klassen; C. Suryanarayana;R. Bormann

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Scr. Mater.

    Keywords

    mechanical alloying; ceramic-intermetallic composite; transmission; electron microscopy (TEM); tension test; superplasticity; ALLOYS; CERAMICS; BEHAVIOR; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering

    Abstract

    A ceramic-intermetallic composite of Ti5Si3 With 40 vol.% TiAl was synthesized by mechanical alloying and hot isostatic pressing. The microstructure consisted of equiaxed grains of gamma-TiAl and zeta-Ti5Si3 with a size of about 400 nm. This composite exhibited a tensile elongation of 150% at 950 degrees C, using a strain rate of 4 x 10(-5) s(-1). This temperature for superplastic deformation is just about 0.5 T-m, the lowest normalized superplastic temperature reported for any ceramic-based material. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

    Journal Title

    Scripta Materialia

    Volume

    59

    Issue/Number

    4

    Publication Date

    1-1-2008

    Document Type

    Article

    Language

    English

    First Page

    455

    Last Page

    458

    WOS Identifier

    WOS:000257615700022

    ISSN

    1359-6462

    Share

    COinS