2020
DOI: 10.1002/adem.201901363
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Phase Transition Mechanism and Mechanical Properties of AlCrFe2Ni2 High‐Entropy Alloys with Changes in the Applied Carbon Content

Abstract: To understand the effect of carbon addition on dual‐phase high‐entropy alloys (HEAs), the mechanism of phase transition and mechanical properties of AlCrFe2Ni2Cx (x = 0, 0.06, 0.12, 0.18, 0.24) are investigated systematically. The results show that carbon addition induced the growth and aggregate of disordered noodle‐like face‐centered cubic (FCC) phases. The volume fraction of the FCC phase increases from 33.2% to 51.2% as the C content increases. The Al and Ni in the alloys are segregated at the phase bounda… Show more

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Cited by 7 publications
(6 citation statements)
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“…Recently, the investigated multi-phase alloys systems mainly include Al-(Co)-Cr-Cu-Fe-Ni [12,20,21], Al-Co-Cr-Fe-Ni [22][23][24][25], Al-Cr-Fe-Ni [18,19,[25][26][27], Al-Co-Fe-Ni [28,29], Ti-Nb-Ta-Mo-Zr [30], and so on. Among the above multi-phases HEAs, there have been occasional reports of spinodal decomposition [25,[31][32][33].…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the investigated multi-phase alloys systems mainly include Al-(Co)-Cr-Cu-Fe-Ni [12,20,21], Al-Co-Cr-Fe-Ni [22][23][24][25], Al-Cr-Fe-Ni [18,19,[25][26][27], Al-Co-Fe-Ni [28,29], Ti-Nb-Ta-Mo-Zr [30], and so on. Among the above multi-phases HEAs, there have been occasional reports of spinodal decomposition [25,[31][32][33].…”
Section: Introductionmentioning
confidence: 99%
“…The alloy system Al-(Co)-Cr-Fe-Ni also offers means to exploit some features of spinodal decomposition (Langer, 1971) for microstructure tailoring. Novel dual phase materials have been reported in the system Al-(Co)-Cr-Fe-Ni (Dong et al, 2016;Abuzaid and Sehitoglu, 2018;Bönisch et al, 2018;Gwalani et al, 2019;Li Z. et al, 2020). Unique so far are vermicular duplex microstructures (Dong et al, 2016; composed of an ultrafine vermicular FCC phase intertwined with a spinodally decomposed BCC in nearly equal volume fraction.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the search for a more affordable HEA led to the elimination of the expensive Co. One of the emerging Cofree alloys, which holds great promise, is the non-equimolar AlCrFe 2 Ni 2 alloy (Dong et al, 2016). While the number of publications dedicated to the study of the AlCrFe 2 Ni 2 HEA is still quite limited, its microstructure is known to bear remarkable similarities with that of the AlCrCoFeNi alloy, and it shares its microstructural sensitivity to the cooling rate (Dong et al, 2016;Li Z. et al, 2020).…”
Section: Introductionmentioning
confidence: 99%
“…Thermodynamically, Fe and Cr tend to concentrate more in a disordered FCC solid solution phase, while Ni and Al are typically concentrated in the ordered BCC arrangement (B2 phase). When the cooling rate is extremely high (such as in additive manufacturing) there is not enough time for the solidification route to go through the formation of an FCC phase, and a spinodal decomposition occurs, partitioning the alloy to Fe-and Cr-rich regions and Al-and Ni-rich regions (Wang et al, 2008;Manzoni et al, 2013;Dong et al, 2016;Munitz et al, 2016;Rogal et al, 2019;Li Z. et al, 2020). Both regions possess a BCC crystal structure, with the Cr-Fe-rich phase being a configurationally disordered solid solution, and the Al-Ni-rich phase being an ordered B2 (Manzoni et al, 2013;Rogal et al, 2019;.…”
Section: Introductionmentioning
confidence: 99%
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