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Effect of nitrogen addition and annealing temperature on superelastic properties of Ti-Nb-Zr-Ta alloys
- Issue Date
- 15-Oct-2010
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Shape memory alloys; Superelasticity; Ti alloys; Nitrogen
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.527, no.26, pp 6844 - 6852
- Pages
- 9
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 527
- Number
- 26
- Start Page
- 6844
- End Page
- 6852
- ISSN
- 0921-5093
1873-4936
- Abstract
- The composition dependence of the mechanical properties and martensitic transformation behavior of Ti-Nb-4Zr-2Ta-N alloys is investigated. The effect of annealing temperature on the microstructural evolution and superelastic properties in the N-added and N-free alloys is compared. The addition of N decreases M-s of Ti-Nb-4Zr-2Ta alloys by about 200 K per 1 at.%N and improves the superelastic properties of Ti-Nb-4Zr-2Ta alloys. The dissolution of a phase increases the martensitic transformation start temperature and decreases the superelastic recovery strain for the N-free alloy, whereas it causes opposite effects for the N-added alloy. The different annealing temperature dependences of superelastic properties are discussed on the basis of microstructure observation. (C) 2010 Elsevier B.V. All rights reserved.
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