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

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Anadolu Üniversitesi Bilim Ve Teknoloji Dergisi A - Uygulamalı Bilimler Mühendislik
Volume:18 Issue:2
EFFECT OF COOLING RATE ON THE SHAPE MEMORY BEHAVIOR OF Ti-54at.%Ni ALLOYS

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

Pages : 535-542

View : 14 | Download : 9

Publication Date : 2017-06-30

Article Type : Research Paper

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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