EFFECT OF COOLING RATE ON THE SHAPE MEMORY BEHAVIOR OF Ti-54at.%Ni ALLOYS

Year 2017, Volume: 18 Issue: 2, 535 - 542, 30.06.2017

IRFAN Kaya

https://doi.org/10.18038/aubtda.287669

Cited By: 2

Abstract

The effects of cooling rate after
aging at 550 °C for 3 h on the shape memory behavior and mechanical properties
of Ti-54at.%Ni alloys are investigated in compression. It was found that it is
possible to tailor the transformation temperatures of Ti-54at.%Ni alloys with
cooling rate where multiple step transformation can also be observed. Shape
memory behavior with transformation strain of 1 % is observed under ultra high
stress level of 1500 MPa. It is also found that shape memory effect is highly
stress dependent.

 

Keywords

Ni-rich NiTi shape memory alloy, Thermomechanical loading, Cooling rate effect, Multiple step transformation, R-Phase transformation

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