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Effects of pre-deformation and subsequent low-temperature annealing on transformation, mechanical properties and shape memory behavior of a Ti-rich TiNi alloy

  • Ying Yan , Wei Jin , Xiao-Wu Li , Jian Wang and Jia-Hua Liu
Published/Copyright: June 11, 2013
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 102 Issue 5

Abstract

Effects of pre-deformation in the martensitic state and subsequent low-temperature annealing on the phase transformation, tensile properties and shape memory performance of a Ti-49.8 at.% Ni alloy were investigated in order to improve mechanical and memory properties of the alloy. The results show that water quenching from 850°C and subsequent annealing do not induce Ti-rich precipitates in the alloy. Transformation from parent to R-phase appears on cooling for alloys annealed at 350–500°C after pre-deformed to the strain of as high as 19.0%, and the transformation temperature and rate from parent to R-phase are not affected by pre-deformation, but Ms and Mf reduce with increasing pre-deformation strain, and the volume fraction of R-phase increases in the microstructure of alloys annealed at low temperature after pre-deformation to higher strain. Tensile and memory properties of the Ti-49.8 at.% Ni alloy can be improved by appropriate pre-deformation (more than 27.8% strain) in the martensitic state and subsequent low-temperature annealing (at 4008C).

Keywords: Ti-rich TiNi alloy; Pre-deformation; Annealing; Shape memory performance; Phase transformation
* Correspondence address, Associate professor Ying Yan P. O. Box 104 Institute of Materials Physics and Chemistry College of Sciences, Northeastern University No. 3-11, Wenhua Road, Heping District Shenyang 110004, P. R. China Tel.: +86 24 8367 8479 E-mail:

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Received: 2010-9-1
Accepted: 2011-3-2
Published Online: 2013-06-11
Published in Print: 2011-05-01

© 2011, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.110511
Keywords for this article
Ti-rich TiNi alloy; Pre-deformation; Annealing; Shape memory performance; Phase transformation

Articles in the same Issue

  1. Original Contributions
  2. Alloying effect on microstructure and mechanical properties of thermomechanically processed Ni3(Si,Ti) alloys
  3. Contents
  4. Contents
  5. Original Contributions
  6. Neuro-finite element application in material characterization using small punch test
  7. Multi-phase biocomposite material in-situ fabricated by using hydroxyapatite and amorphous nanosilica
  8. Particularities of the formations of bainite and martensite/austenite phase in low carbon low alloy steels during continuous cooling
  9. Texture analysis of polymer modified bitumen images
  10. Influence of nitridation time on microstructure, morphology and optical properties of GaN nanowires by nitridizing Ga2O3/Cr thin films
  11. Deformation behaviour of freestanding single-crystalline Ni3Al-based nanoparticles
  12. Precipitation strengthening in high manganese austenitic TWIP steels
  13. Effects of pre-deformation and subsequent low-temperature annealing on transformation, mechanical properties and shape memory behavior of a Ti-rich TiNi alloy
  14. Enhancement in optical transmission of ZnO: Al film by c-orientation arrayed growth
  15. Physical and mechanical behavior of high strength self-compacting concrete containing ZrO2 nanoparticles
  16. Experimental and numerical studies of metallic powders subjected to cold isostatic pressing
  17. Consumption of Cu pad during multiple reflows of Ni-doped SnAgCu solder
  18. Nanocrystalline CdS thin films prepared by sol-gel spin coating
  19. An energy absorption system based on carbon nanotubes and non-aqueous liquid
  20. People
  21. Professor Dr.-Ing. Jürgen Haußelt zum 65. Geburtstag
  22. DGM News
  23. DGM News
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