Dergiler / Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2021 / Cilt: 25 - Sayı: 3

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

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

Semra ERGEN, Öznur BAĞ, Fikret YILMAZ, Uğur KÖLEMEN

Sayfa
735–740
DOI
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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. %) meltspun 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.

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