Ferroelastic “Memory” and Mechanical Properties in Gold-Cadmium

  • D. S. Lieberman
  • M. A. Schmerling
  • R. W. Karz


During the past dozen years, the interest, research, development, and application of alloys exhibiting mechanical “memory” behavior have steadily increased--the particularly sharp increase over the past few years in part stimulated this timely symposium. Most of the attention has been focused on TiNi (1) with less on alloys such as CuAlNi (2), CuZn (3), CuZnSi (4), CuZnSn (5), NiAl (6), InTl (7, 8), AuCd (9), AgCd (10)--although the amount of fundamental research effort devoted to these latter alloys is substantial, as can be seen from these proceedings. Much of this work has been reviewed quite recently (11) and/or is treated and referenced rather completely in this volume. This paper will consider relevant phenomena in the near-equiatomic ordered alloys of AuCd, a system which has been so important in contributing to our understanding in such ordered alloys and other metal systems of: point defects on quenching (12), self-diffusion (13), elastic constants behavior and mode softening (14), martensitic phase transformations (15, 16), twin boundary motion (17), and the unusual “memories” described here (9). Indeed,many important theories and definitive experiments associated with these phenomena--including the “shape memories”--were devised first for or on this alloy. A theory of one of the “memories” is presented here which satisfactorily accounts for all of the experimental observations and which provides some insight into the others.


Fatigue Life Shape Memory Strain Amplitude Twin Boundary Loop Shape 
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Copyright information

© Springer Science+Business Media New York  1975

Authors and Affiliations

  • D. S. Lieberman
    • 1
  • M. A. Schmerling
    • 1
  • R. W. Karz
    • 1
  1. 1.Department of Metallurgy and Mining Engineering and Materials Research LaboratoryUniversity of Illinois at Urbana-ChampaignUrbanaUSA

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