Damage Mechanisms in Ti3Al Matrix Composites

[+] Author and Article Information
Demitris Kouris

Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, AZ 85287-6106

David Marshall

Rockwell International Science Center, 1049 Camino Dos Rios, Thousand Oaks, CA 91360

J. Eng. Mater. Technol 116(3), 319-324 (Jul 01, 1994) (6 pages) doi:10.1115/1.2904294 History: Received August 14, 1993; Revised January 27, 1994; Online April 29, 2008


The paper discusses experimental observations and some related theoretical results associated with the mechanical response of two Ti3 Al matrix composites, subjected to transverse loading. Both composites contain continuous unidirectional fibers; however, there are considerable differences in the composition of the two interfaces. The Ti3 Al/SCS-6 system contains brittle reaction products around the fibers that degrade the strength of the composite. The second composite consists of a Ti3 Al matrix reinforced by sapphire fibers that are strongly bonded to the matrix. Experimental observations indicate that the damage mechanisms in the two composites are substantially different. Utilizing elastic analyses of the local stress field, an attempt was made to explain the dependence of the observed damage mechanisms on the residual field and the properties of the interface.

Copyright © 1994 by The American Society of Mechanical Engineers
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