Abstract
The strain jump across the Austenite-Martensite (A-M) interface in single crystal Cu-14wt%Al-4.12wt%Ni Shape Memory Alloys (SMAs) under uniaxial tension was studied in this paper. A crystallographic-based mechanics analysis on the formation and microstructure of the interface was performed. By using the high sensitive Moiré interference technique, the full-field deformation patterns during the transformation process were successfully recorded. The orientation of the habit plane (A-M interface) and the magnitude of the shape strain were determined precisely from the Moiré fringe patterns. The theoretical predictions on the habit plane normal and the shape strain were compared with the measured results and good agreements were obtained.
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The project supported by the National Natural Science Foundation of China (19891180(3)) and Hong Kong Research Grant Committee (DAG 96/97. EG15)
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Xiangyang, Z., Qingping, S. & Shouwen, Y. On the strain jump in shape memory alloys—A crystallographic-based mechanics analysis. Acta Mech Sinica 15, 134–144 (1999). https://doi.org/10.1007/BF02485878
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DOI: https://doi.org/10.1007/BF02485878