期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 556, 期 -, 页码 79-85出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2012.12.095
关键词
High entropy alloys; Mechanical alloying; X-ray diffraction; Differential scanning calorimetry; Mossbauer spectroscopy
The equiatomic multicomponent AlCoCrCuFeNi hexanery high entropy alloy (HEA) was synthesized by mechanical alloying. The effect of the addition of W and Zr was studied by making equiatomic AlCoCrCuFeNiW septenary and AlCoCrCuFeNiWZr octonary high entropy alloys. The effect of alloying addition with milling time was studied using XRD, DSC/TGA, SEM, TEM and Mossbauer spectroscopy. Supersaturated solid solution structure was achieved after 60 h milling for hexanery alloy and after 40 h milling for both septenary and octonary high entropy alloys. The variation of Mossbauer parameters for AlCoCrCuFeNi system with the addition of W and Zr makes its magnetic environment more complex which is indicated by the conversion of magnetic AlCoCrCuFeNi HEA (60 h milling) to partially paramagnetic AlCoCrCuFeNiW (40 h milling) to completely paramagnetic AlCoCrCuFeNiWZr high entropy alloy. (C) 2012 Elsevier B. V. All rights reserved.
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