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shows the element distribution maps of Fe 55 Cr 15-Ni 30ex Ta x (x ¼ 0, 5, 8, 10 and 15) MPEAs. As seen in Fig. 3(a), all the elements in the Ta0 alloy are homogeneously distributed, which further verifies that the Ta0 ally exhibits the singlephase FCC microstructure. Fig. 3(b), (c) and (e) present the elemental distribution maps for the hypoeutectic (Ta5), eutectic (Ta8) and hypereutectic (Ta15) microstructure, respectively. Obviously, the primary FCC phase is rich in Fe, Cr and Ni in the hypoeutectic alloy (see Fig. 3(b)), whereas the
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Co-Cr-Fe-Ni-Ta eutectic multi-principal element alloys (MPEAs) demonstrate great potential to replace structural alloys in engineering applications. However, the cost of these alloys is high due to the usage of a number of precious metals. To decrease the cost, the present work developed a set of novel Fe55Cr15Ni30−xTax (x = 0, 5, 8, 10 and 15 at.%...
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... of residual phase. The volume fraction of Laves phase of Ta10 and Ta15 alloys is estimated to be 43.0% and 60.6%, respectively. Clearly, the volume fraction of Laves phase is closely related to the content of Ta element. (Ta15) microstructure, respectively. Obviously, the primary FCC phase is rich in Fe, Cr and Ni in the hypoeutectic alloy (see Fig. 3(b)), whereas the primary Laves phase is rich in Ta in the hypereutectic alloy (see Fig. 3(e)). From Fig. 3(c), it can be found that the FCC phase in the eutectic microstructure is rich in Fe, Cr and Ni, while the Laves phase in the eutectic microstructure is enriched in Ta. Apparently, in our alloys, the elemental distribution of the ...
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... to be 43.0% and 60.6%, respectively. Clearly, the volume fraction of Laves phase is closely related to the content of Ta element. (Ta15) microstructure, respectively. Obviously, the primary FCC phase is rich in Fe, Cr and Ni in the hypoeutectic alloy (see Fig. 3(b)), whereas the primary Laves phase is rich in Ta in the hypereutectic alloy (see Fig. 3(e)). From Fig. 3(c), it can be found that the FCC phase in the eutectic microstructure is rich in Fe, Cr and Ni, while the Laves phase in the eutectic microstructure is enriched in Ta. Apparently, in our alloys, the elemental distribution of the primary FCC(Laves) phase is similar to that of the eutectic FCC(Laves) phase. Similar ...
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... 60.6%, respectively. Clearly, the volume fraction of Laves phase is closely related to the content of Ta element. (Ta15) microstructure, respectively. Obviously, the primary FCC phase is rich in Fe, Cr and Ni in the hypoeutectic alloy (see Fig. 3(b)), whereas the primary Laves phase is rich in Ta in the hypereutectic alloy (see Fig. 3(e)). From Fig. 3(c), it can be found that the FCC phase in the eutectic microstructure is rich in Fe, Cr and Ni, while the Laves phase in the eutectic microstructure is enriched in Ta. Apparently, in our alloys, the elemental distribution of the primary FCC(Laves) phase is similar to that of the eutectic FCC(Laves) phase. Similar results were also ...
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... the Ta8 alloy is comprised of a FCC phase (bright phase) and a Laves phase (dark phase). This is agreement with the XRD result (see Fig. 1(a)). Fig. 5(b) and (c) present the TEM-EDS results. As seen in Fig. 5(b) and (c), the FCC phase is enriched in Fe, Cr and Ni, while the Laves phase is enriched in Ta. This conforms to the SEM-EDS result (see Fig. ...
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