Title

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

Authors

Authors

T. Klassen; C. Suryanarayana;R. Bormann

Comments

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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

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