1. A Sequence of Phase Transformations and Phases in NiCoFeCrGa High Entropy Alloy.
- Author
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Vida, Ádám, Lábár, János, Dankházi, Zoltán, Maksa, Zsolt, Molnár, Dávid, Varga, Lajos K., Kalácska, Szilvia, Windisch, Márk, Huhn, Gabriella, Chinh, Nguyen Q., Poon, S. Joseph, and Jiang, Jian-Zhong
- Subjects
PHASE transitions ,ELECTRON energy loss spectroscopy ,ENTROPY ,MASS spectrometry ,ALLOYS - Abstract
The present investigation is directed to phase transitions in the equimolar NiCoFeCrGa high entropy alloy, which is a mixture of face-centered cubic (FCC) and body-centered cubic (BCC) crystalline phases. The microstructure of the samples was investigated by using scanning electron microscopy (SEM), time-of-flight secondary ion mass spectroscopy (TOF-SIMS), transmission electron microscopy-based energy-dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS), as well as X-ray diffraction (XRD) measurements. Based on the phases observed in different temperature ranges, a sequence of the phase transitions can be established, showing that in a realistic process, when freely cooling the sample with the furnace from high to room temperature, a microstructure having spinodal-like decomposition can also be expected. The elemental mapping and magnetic behaviors of this decomposed structure are also studied. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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