The Effect of Rapidly Solidified Microstructures on the Martensitic Transformation in Ti50-Ni45-Cu5 Shape Memory Alloys

Yeon Wook Kim; Tae Hyun Nam

doi:10.4028/www.scientific.net/MSF.475-479.1965

Paper Titles

Effects of Pre-Strain and Nb Content on Transformation Temperatures in Ti-Ni-Nb Shape Memory Alloy
p.1949

Influence of Cold Working on Deformation Behavior and Shape Memory Effect of Ti-Ni-Nb
p.1953

Shape Memory Alloy Pipe-Joint with Copper Coating
p.1957

Influence of Cyclic Deformation on Shape Memory Characteristics of Ti-Ni-Cu Alloys Fabricated by Pulse-Current Pressure Sintering Method
p.1961

The Effect of Rapidly Solidified Microstructures on the Martensitic Transformation in Ti₅₀-Ni₄₅-Cu₅ Shape Memory Alloys
p.1965

The Dynamic Impact Behavior of Ti₅₀Ni₄₇Fe₃ Shape Memory Alloys
p.1969

Effect of Ce Addition on Martensitic Transformation Behavior of TiNi Shape Memory Alloys
p.1973

Anomalies in Physical Properties Related to the Stability of the B2-Phase in Ti-Ni-Co Shape Memory Alloys
p.1977

Anisotropy in Elastic Properties of Textured TiNbAl Shape Memory Alloy
p.1983

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The Effect of Rapidly Solidified Microstructures on the Martensitic Transformation in Ti₅₀-Ni₄₅-Cu₅ Shape Memory Alloys

Abstract:

Transformation behaviors and shape memory characteristics of Ti–Ni45-Cu5 alloy ribbons prepared by melt spinning were investigated by means of DSC, XRD and OM. In these experiments particular attention has been paid to change the ejection temperature of the melt from 1400°C to 1600 °C. As the results, the thickness of ribbons could be controlled. An increase of the superheat of the melt leads to a reduced ribbon thickness and a refinement of grains. The microstructural refinement and the increased internal strains achieved by controlling the melt-spinning temperature decreased Ms significantly. It was also found that two-step transformation (B2-B19-B19’) occurred in the ribbons fabricated at higher melt-spinning temperatures than 1450°C.