Microstructures and Phase Transformations of Melt-Spun Ti-V-Al High Temperature Shape Memory Alloys with Addition of Zr

Year 2021, Volume: 25 Issue: 3, 735 - 740, 30.06.2021

Öznur Bağ , Fikret Yılmaz , Uğur Kölemen , Semra Ergen

https://doi.org/10.16984/saufenbilder.797337

Abstract

In this study, the effects of Zr addition on phase transformation temperatures, microstructure of Ti-12V-4Al (wt. %) high temperature shape memory alloys (HTSMAs) manufactured using melt-spinning technique were investigated. During heating, differential scanning calorimetry (DSC) curves showed that austenite transformation temperature of Ti-12V-4Al (wt. %) melt-spun ribbon was single-stage transformation and Ti-12V-4Al-0.5Zr (wt. %) melt-spun ribbon was two-stage transformation. In the scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyzes, unveiled that the melt-spun ribbons consisted of martensite, austenite and R phases. Transmission electron microscopy (TEM) analysis showed that the thickness of martensite plates in ribbons was thinned by the addition of Zr.

Keywords

High temperature, shape memory alloys, phase transition

Project Number

2017/95

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