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

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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.

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Acknowledgement

One of the authors (J. H. L.) would like to thank the Dong-A University, Pusan, Korea for support during his stay in the University of Washington. The authors also would like to thank the National Science Foundation, Grant No. CMS - 9414696 for partial support of the work.

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Authors and Affiliations

  1. Materials Science and Engineering, University of Washington, Box 352120, Seattle, WA, 98195-2120, USA

    J. H. Lee, K. Hamada, K. Miziuuchia, M. Taya & K. Inoue

  2. Mechanical Engineering, University of Washington, Box 352600, Seattle, WA, 98195-2600, USA

    K. Hamada & M. Taya

  3. Osaka Municipal Research Institute, Jyoutou-ku, Osaka, 536, Japan

    K. Miziuuchia

Authors
  1. J. H. Lee
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  2. K. Hamada
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  3. K. Miziuuchia
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  4. M. Taya
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  5. K. Inoue
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Corresponding author

Correspondence to J. H. Lee.

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Lee, J.H., Hamada, K., Miziuuchia, K. et al. Microstructures and Mechanical Properties of 6061 Al Matrix Smart Composite Containing TiNi Shape Memory Fiber. MRS Online Proceedings Library 459, 419–424 (1996). https://doi.org/10.1557/PROC-459-419

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  • DOI: https://doi.org/10.1557/PROC-459-419

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