Equilibrium phase of high-entropy FeCoNiCrCu0.5 alloy at elevated temperature

Lin, Chun-Ming; Tsai, Hung-Chin

doi:10.1016/j.jallcom.2009.09.041

Cited by 96 publications

(40 citation statements)

References 17 publications

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“…Second, the phases referred in this work are all identified in the as-cast state and they are hence very possibly in the metastable state. However, evidences have shown that these metastable phases have quite good thermal stability [28][29][30][31] and can hence be regarded as very close to the stable phases. This gives confidence to the general applicability of the VEC rule, considering it works so well for such an extended series of various alloy systems.…”

Section: Discussionmentioning

confidence: 99%

Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys

Guo

et al. 2011

Journal of Applied Physics

1,841

764

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Hydrogen quantum effects in hydride LaNi5H7J. Appl. Phys. 110, 063533 (2011) Accurate determination of the Gibbs energy of Cu-Zr melts using the thermodynamic integration method in Monte Carlo simulations J. Chem. Phys. 135, 084502 (2011) Efficient calculation of -and -nitrogen free energies and coexistence conditions via overlap sampling with targeted perturbation J. Chem. Phys. 135, 044125 (2011) An incremental mean first passage analysis for a quasistatic model of polymer translocation through a nanopore J. Chem. Phys. 134, 154905 (2011) The effect of pressure on the phase transition behavior of tridecane, pentadecane, and heptadecane: A Fourier transform infrared spectroscopy study J. Chem. Phys. 134, 144503 (2011) Additional information on J. Appl. Phys. Phase stability is an important topic for high entropy alloys (HEAs), but the understanding to it is very limited. The capability to predict phase stability from fundamental properties of constituent elements would benefit the alloy design greatly. The relationship between phase stability and physicochemical/thermodynamic properties of alloying components in HEAs was studied systematically. The mixing enthalpy is found to be the key factor controlling the formation of solid solutions or compounds. The stability of fcc and bcc solid solutions is well delineated by the valance electron concentration (VEC). The revealing of the effect of the VEC on the phase stability is vitally important for alloy design and for controlling the mechanical behavior of HEAs.

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Section: Discussionmentioning

confidence: 99%

Effect of valence electron concentration on stability of fcc or bcc phase in high entropy alloys

Guo

et al. 2011

Journal of Applied Physics

1,841

764

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“…1. In fact, the Cu-rich phase precipitate occurs in the matrix because of the positive mixing enthalpy of FeeCu, CoeCu, NieCu and CreCu [9,12,13,15,16,19,20]. Because of this it may be not easy to eliminate segregation of copper by heat treatment.…”

Section: Methodsmentioning

confidence: 99%

“…The corrosion rates of the specimens that had been treated at high temperatures increased dramatically than those of the others. The high aging temperature level of significance improved the corrosion properties, because the lattice was distorted by copper associated with extensive thermal migration under heat treatment and atomic size differs from that of all other atoms [15,16]. Therefore, the copper segregation existed in the ID structure and then caused a nonprotective passive film [12] on the Cu 0.5 CoCrFeNi HEAS surface.…”

Section: Hardness Analysismentioning

confidence: 99%

“…HEAS with excellent high temperature properties, mechanical properties, and corrosion resistance are promising materials for industrial applications [9e15]. However, the FeCoNiCrCu x alloy system in a 3.5% NaCl solution may have a negative result of corrosion properties [12] and FeCoNiCrCu 0.5 alloys annealed at various temperatures form microstructure and property influences [15]. The effects of temperature on the microstructure and properties of Cu 0.5 CoCrFeNi alloy aged at 350e950 C have been examined [16].…”

Section: Introductionmentioning

confidence: 99%

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Effect of aging treatment on microstructure and properties of high-entropy Cu0.5CoCrFeNi alloy

2010

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“…Recently, various topics on HEAs have been reported, including microstructure and mechanical properties [12][13][14], effects of adding more elements [15,16], thermal stability [17][18][19], wear and corrosion resistance [20,21], hard coating [22,23], barrier films [24,25] and mechanical alloying behavior [26][27][28][29][30]. These are helpful in understanding HEAs in both academic and application aspects.…”

Section: Introductionmentioning

confidence: 99%