The effect of cooling rate on the structure and selected properties of AlCoCrFeNiSix (x = 0; 0.25; 0.5; 0.75) high entropy alloys
Spilka M. 1Radon A. 1Mlynarek-Zak K. 1Babilas R. 1Kadziolka-Gawel M. 2Gebara P. 3Warski T. 4Lonski W.1
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作者信息
1. Department of Engineering Materials and Biomaterials Silesian University of Technology
2. Institute of Physics University of Silesia
3. Department of Physics Cz?stochowa University of Technology
4. ?ukasiewicz Research Network Institute of Non-Ferrous Metals
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Abstract
? 2022 The Author(s)High entropy alloys with variable silicon content were prepared by two different methods to determine the influence of the cooling rate and chemical composition on the structure and properties of the alloys. First, the structure of the alloys was investigated using X-ray diffractometry and electron microscopy and compared with M?ssbauer spectra to obtain a comprehensive description of the atom arrangement. The formation ability of the BCC and B2 phases was confirmed. The magnetic properties were examined using a vibrating sample magnetometer and M?ssbauer spectroscopy. The corrosion resistance behavior was studied by electrochemical testing. Our results show that the saturation magnetization tends to decrease with increasing silicon content and that the lowest coercive force was noted for rapidly cooled plates. The highest corrosion resistance in a 3.5% NaCl solution characterizes the AlCoCrFeNiSi0.75 alloy in the form of plates. For which Ecorr and jcorr was equal to ? 0.155 V and 0.17 μA/cm2. The addition of Si led to an increase in the hardness of the ingots and plates. For example, AlCoCrFeNiSi0.75 shows 859 HV for the ingot and 727 HV for the plate.
Key words
Electrochemical measurements/High entropy alloys/Magnetic properties/M?ssbauer spectroscopy/Transmission electron microscopy/X-ray diffraction
NSTL
Elsevier