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Stress-Induced Martensitic Transformation Cycling and Two-Way Shape Memory Training in Cu-Zn-Al Alloys

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Abstract

The character and mechanism of two-way shape memory in Cu-Zn-Al alloys is investigated by means of closely controlled thermomechanical cycling and careful measurement of the progressive effect of the particular “training” routine, as well as by correlary studies of submicrostructural evolution as training proceeds. The results establish the quantitative relationship between the cyclic training routine and the ability of the sample to exhibit two-way shape memory. The variation of numerous training parameters with cycling is presented and interpreted. Microscopic studies indicate that as two-way shape memory training proceeds, specific physical features develop in the parent phase submicrostructure, particularly dislocation tangles and “vestigial” martensite markings; these assist in the nucleation and growth of a preferred martensite plate arrangement during cooling.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Naval Postgraduate School, Code 69Ps, 93940, Monterey, CA

    Jeff Perkins (Associate Professor of Materials Science)

  2. Naval Postgraduate School, 93940, Monterey, CA

    R. O. Sponholz (LCDR, United States Navy and Graduate Student)

Authors
  1. Jeff Perkins
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  2. R. O. Sponholz
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Perkins, J., Sponholz, R.O. Stress-Induced Martensitic Transformation Cycling and Two-Way Shape Memory Training in Cu-Zn-Al Alloys. Metall Trans A 15, 313–321 (1984). https://doi.org/10.1007/BF02645117

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  • DOI: https://doi.org/10.1007/BF02645117

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