1. Effect of thermomechanical training on the transformation temperatures and properties of NiTi melt-spun ribbons
- Author
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Albert C. Kneissl, Mihael Brunčko, and K. Mehrabi
- Subjects
Austenite ,Differential scanning calorimetry ,Materials science ,Transmission electron microscopy ,Nickel titanium ,Diffusionless transformation ,Phase (matter) ,Mechanical engineering ,Shape-memory alloy ,Composite material ,Transformation (music) - Abstract
The present work aims to study the influence of thermomechanical training and two-way shape memory effect (TWSME) on the transformation behaviour of Ni-50.3 at. % Ti melt-spun ribbons by differential scanning calorimetry (DSC). The results showed that the transformation temperatures decrease with an increase in the number of thermal cycles. The austenitic transformation remains a one-stage transformation, while the martensitic transformation changes to a two-stage transformation. These changes are due to the appearance of an intermediate phase which was stabilized probably by the accumulation of defects introduced by thermomechanical training. The phase that is present after training was studied by X-ray diffraction and transmission electron microscopy.
- Published
- 2009
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