On Deformation of A-M Interface in Single Crystal Shape Memory Alloys and Some Related Issues

[+] Author and Article Information
Qing-Ping Sun, Terry Ting Xu, Xiangyang Zhang

Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, P. R. China

J. Eng. Mater. Technol 121(1), 38-43 (Jan 01, 1999) (6 pages) doi:10.1115/1.2815997 History: Received February 11, 1998; Revised August 17, 1998; Online November 27, 2007


Recent experimental results on the deformation field of single crystal CuNiAl shape memory alloys (SMA) by using Moiré interference technique are reported and two kinds of austenite-martensite (A-M) interfaces with different deformation features are identified. The experimental discovery questioned the invariant plane hypothesis used in crystallographic theory of martensitic transformation. Some fundamental issues on the property of A-M interface and the related micro- and macro-deformation features are discussed.

Copyright © 1999 by The American Society of Mechanical Engineers
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