Journal
CRYSTALS
Volume 11, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/cryst11121527
Keywords
high entropy alloys; TiZrTaNb alloy; microstructure; electrochemical property
Funding
- National Natural Science of Foundation of China [52001262, 52071188, 52171120]
- Zhejiang Province Natural Science Foundation of China [ZY22E010293, LQ20E010003]
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The effects of Sn and Mo alloying elements on the microstructure and electrochemical properties of TiZrTaNb high entropy alloys were studied, showing that they promoted dendritic growth and accelerated interdendritic segregation, with TiZrTaNbMo alloy exhibiting excellent corrosion properties. Alloying elements have a significant impact on the microstructure and electrochemical properties of high entropy alloys.
The effects of Sn and Mo alloying elements on the microstructure and electrochemical properties of TiZrTaNb high entropy alloys were studied by optical microscope (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and electrochemistry. TiZrTaNb, TiZrTaNbMo and TiZrTaNbSn alloys with equal atomic ratio were prepared by the arc melting method. The results showed that the microstructure of the high entropy alloys was dendritic structure with single BCC structure. The addition of Mo and Sn elements promoted the growth of the dendritic structure and accelerated the interdendritic segregation of the TiZrTaNb alloy. The TiZrTaNbMo alloy exhibited excellent corrosion properties compared to TiZrTaNb and TiZrTaNbSn alloys based on corrosion parameters I-corr, phi(corr), I-pass. The corrosion mechanism is discussed based on the corrosion morphology. The alloying elements have an important effect on the microstructure and electrochemical properties of a high entropy alloy.
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