Annealing behavior and shape memory effect in NiTi alloy processed by equal-channel angular pressing at room temperature
SCIE
SCOPUS
- Title
- Annealing behavior and shape memory effect in NiTi alloy processed by equal-channel angular pressing at room temperature
- Authors
- Shahmir, H; Nili-Ahmadabadi, M; Wang, CT; Jung, JM; Kim, HS; Langdon, TG
- Date Issued
- 2015-04-01
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- A martensitic NiTi shape memory alloy was processed successfully by equal-channel angular pressing (ECAP) for one pass at room temperature using a core-sheath billet design. The annealing behavior and shape memory effect of the ECAP specimens were studied followed by post-deformation annealing (PDA) at 673 K for various times. The recrystallization and structural evolution during annealing were investigated by differential scanning calorimetry, dilatometry, X-ray diffraction, transmission electron microscopy and microhardness measurements. The results indicate that the shape memory effect improves by PDA after ECAP processing. Annealing for 10 mm gives a good shape memory effect which leads to a maximum in recoverable strain of 6.9 pct upon heating where this is more than a 25 pct improvement compared with the initial state. (C) 2015 Elsevier B.V. All rights reserved.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26841
- DOI
- 10.1016/J.MSEA.2015.01.072
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, vol. 629, page. 16 - 22, 2015-04-01
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