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Fabrication and Characterization of TiNi/AL Smart Composites

Published online by Cambridge University Press:  01 February 2011

Gyu Chang Lee ,
Jun Hee. Lee  and
Young Chul Park
Gyu Chang Lee
Affiliation:
Research Institute of Industrial Science and Technology (RIST), Pohang, Korea
Jun Hee. Lee
Affiliation:
Department of Metallurgical Engineering, Dong-A University, Pusan, Korea
Young Chul Park
Affiliation:
Department of Mechanical Engineering, Dong-A University, Pusan, Korea
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Abstract

An attempt was made to fabricate composite material of an Al alloy matrix reinforced by TiNi shape memory fiber using a hot-press method and to investigate its microstructures and mechanical properties. The analysis of SEM and EDS showed that the composite material had good interface bonding. The stress-strain behavior of the composite material was evaluated at room temperature and 363 K as a function of pre-strain, and it showed that the yield stress at 363 K is higher than that at room temperature. It is also found that the yield stress of the composite material increased with increasing the amount of pre-strain and depended on the volume fraction of the fiber and heat treatment. The smartness of the composite could be given due to the shape memory effect of the TiNi fiber, which generated compressive residual stress in the matrix material when heated after being pre-strained. Microstructural observation revealed that interfacial reactions occurred between the matrix and fiber, creating two intermetallic layers.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 785: Symposium D – Materials and Devices for Smart Systems , 2003 , D7.1
Copyright
Copyright © Materials Research Society 2004

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References

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