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Deformation and Failure Modes Under Compressive Loading in Lamellar Tial

Published online by Cambridge University Press:  22 February 2011

Ming Dao ,
Bimal K. Kad  and
Robert J. Asaro
Ming Dao
Affiliation:
Department of Applied Mechanics and Engineering Sciences University of California-San Diego, La Jolla, CA 92093-0411, U.S.A.
Bimal K. Kad
Affiliation:
Department of Applied Mechanics and Engineering Sciences University of California-San Diego, La Jolla, CA 92093-0411, U.S.A.
Robert J. Asaro
Affiliation:
Department of Applied Mechanics and Engineering Sciences University of California-San Diego, La Jolla, CA 92093-0411, U.S.A.
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Abstract

A physically based micromechanical model is applied to study finite compressive deformation and failure in lamellar TiAl microstructures. Orientation dependent yielding of lamellar TiAl single crystals is specifically modeled. Finite element computations show that deformation is inherently non-uniform in the lamellar microstructure. Intergranular fracture (at low strains) and internal buckling (at high strains) are found to be two of the most important failure modes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 1029
Copyright
Copyright © Materials Research Society 1995

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