Transformation behavior and shape memory characteristics of Ti-(45-x)Ni-5Cu-xV alloys
- Authors
- Choi, J.-Y.; Choi, E.; Cho, B.-S.; Chung, Y.-S.; Nam, T.-H.
- Issue Date
- 2007
- Publisher
- SPIE-INT SOC OPTICAL ENGINEERING
- Keywords
- B19 martensite; Hardening; Superelasticity; Ti-Ni-Cu-V alloys; Transformation temperature
- Citation
- Proceedings of SPIE - The International Society for Optical Engineering, v.6423
- Journal Title
- Proceedings of SPIE - The International Society for Optical Engineering
- Volume
- 6423
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/24269
- DOI
- 10.1117/12.780042
- ISSN
- 0277-786X
- Abstract
- Transformation behavior, shape memory characteristrics and superelasticity of Ti-(45-x)Ni-5Cu-xV(at%)(x=0.5-2.0) alloys were investigated. The B2-B19-B19' transformation occurs when V content was more than 1.0 at%, while the B2-B19' transformation occurred when V content was 0.5 at% in solution treated specimens. However, the B2-B19 and B19-B19' transformations were not separated clearly in the thermo-mechanically treated specimens. A temperature gap between Ms'(the B2-B19 transformation start temperature) and Ms(the B19-B19' transformation start temperature) increased from 8 K to 22 K with increasing V content from 1.0at % to 2.0 at% in solution treated specimens. One-stage elongation associated with the B2-B19' transformation occurred in a Ti-44.5Ni-5.0Cu-0.5V alloy, while two-stage elongation associated with the B2-B19-B19' transformation occurred in a Ti-43.0Ni-5.0Cu-2.0V alloy. The superelastic recovery ratio increased from 65.0 % to 86.1 % with increasing V content from 0.5 % to 2.0 % in solution treated specimens. The thermo-mechanically treated specimens showed the superelastic recovery ratio more than 95 %.
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Collections - College of Engineering > Civil and Environmental Engineering > Journal Articles
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