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Microstructures and Mechanical Properties of 6061 Al Matrix Smart Composite Containing TiNi Shape Memory Fiber

Published online by Cambridge University Press:  10 February 2011

J. H. Lee ,
K. Hamada ,
K. Miziuuchia ,
M. Taya  and
K. Inoue
J. H. Lee
Affiliation:
Materials Science and Engineering, University of Washington, Box 352120, Seattle, WA 98195–2120, [email protected]
K. Hamada
Affiliation:
Mechanical Engineering, University of Washington, Box 352600, Seattle, WA 98195–2600, U.S.A.
K. Miziuuchia
Affiliation:
Osaka Municipal Research Institute, Jyoutou-ku, Osaka 536, Japan
M. Taya
Affiliation:
Mechanical Engineering, University of Washington, Box 352600, Seattle, WA 98195–2600, U.S.A.
K. Inoue
Affiliation:
Materials Science and Engineering, University of Washington, Box 352120, Seattle, WA 98195–2120, [email protected]
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Abstract

6061 Al-matrix composite with TiNi shape memory fiber as reinforcement has been fabricated by vacuum hot pressing to investigate the microstructure and mechanical properties. The yield stress of this composite increases with increasing amount of prestrain, and it also depends on the volume fraction of fiber and heat treatment. The smartness of the composite is given due to the shape memory effect of the TiNi fiber which generates compressive residual stresses in the matrix material when heated after being prestrained. Microstructual observations have revealed that interfacial reactions occur between the matrix and fiber, creating two intermetallic layers. The flow strength of the composite at elevated temperatures is significantly higher than that of the matrix alloy without TiNi fiber.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 459: Symposium Y – Materials for Smart Systems II , 1996 , 419
Copyright
Copyright © Materials Research Society 1997

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References

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