Structural and Morphological Investigations on Shape Memory CuZnAl Alloys |
| R. Zengin and N. Kayal
Faculty of Education, Division of Science Teaching, University of Firat, 23169 Elazig, Turkey |
| Received: March 9, 2010; in final form: May 28, 2010 |
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| Macroscopic, structural and morphological features of shape memory CuZnAl alloys were examined by elongation parameter measurement, X-ray diffraction and optical metallography. It has been seen that shape initiating temperature (Tz) is greater than austenite start temperature (As). According to the X-ray diffraction, it has been defined that transformation happened from austenite phase to martensite phase as L21 → M18R and martensite crystal lattice has been in monoclinic structure. In metallographic observations the grain structures were observed, then plate martensites, V-type martensite structures, twin-like bands, precipitation phases were found. In addition, it has been observed that α-sediment phase has occurred in specimens with ageing at austenitic phase condition. |
| DOI: 10.12693/APhysPolA.118.619 PACS numbers: 62.20.fg |