Order–disorder reaction in Alloy 600

Kim, Sung Soo; Kuk, Il-Hyun; Kim, Joung Soo

doi:10.1016/s0921-5093(99)00640-1

Cited by 37 publications

(18 citation statements)

References 10 publications

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“…Similar transitions regarding specific heat in the same temperature window in the alloys containing Ni and Cr have been reported, not only for the commercial alloys such as 617 [41], 600 [4], and Ni-Cr-Mo [42] systems, but also for the model alloys such as Ni-20Cr [41] and Ni-Fe-Cr [43]. Other thermal anomalies in physical (e.g.…”

Section: Specific Heatsupporting

confidence: 75%

“…The samples were heated in a flowing argon atmosphere at a constant heating rate of 10 K/min. The samples experienced a full heating-cooling cycle before each measurement to rule out the exothermic reactions due to non-equilibrium cooling during the quench process [4,28]. For each sample, at least two measurements were performed and the heat capacity error of 5% was estimated.…”

Section: Characterizationsmentioning

confidence: 99%

“…The Invar behavior observed in Ni-65Fe and other Ni-Fe-based alloys has long made understanding thermal expansion in these alloys an important scientific challenge [2]. The temperature dependent specific heat is not only a factor in determining thermal conductivity, but also an indicator of phase transitions such as magnetic phase and other order/disorder transitions [3][4][5]. Control of thermal conductivity is required in many practical applications, and both low (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Thermophysical properties of Ni-containing single-phase concentrated solid solution alloys

Jin

et al. 2017

Materials & Design

119

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Temperature dependent thermophysical properties, including specific heat capacity, lattice thermal expansion, thermal diffusivity and conductivity, have been systematically studied in Ni and eight Ni-containing single-phase face-centered-cubic concentrated solid solution alloys, at elevated temperatures up to 1273 K. The alloys have similar specific heat values of 0.4 -0.5Jg -1 K -1 at room temperature, but their temperature dependence varies greatly due to Curie and K-state transitions. The lattice, electronic, and magnetic contributions to the specific heat have been separated based on first-principles methods in NiCo, NiFe, Ni-20Cr and NiCoFeCr. The alloys have similar thermal expansion behavior, with the exception that NiFe and NiCoFe have much lower thermal expansion coefficient in their ferromagnetic state due to magnetostriction effects. Calculations based on the quasi-harmonic approximation accurately predict the temperature dependent lattice parameter of NiCo and NiFe with less than 0.2% error, but underestimated that of Ni-20Cr by 1%, compared to the values determined from neutron diffraction. All the alloys containing Cr have very similar thermal conductivity, which is much lower than that of Ni and the alloys without Cr, due to the large magnetic disorder.

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Section: Specific Heatsupporting

confidence: 75%

Section: Characterizationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermophysical properties of Ni-containing single-phase concentrated solid solution alloys

Jin

et al. 2017

Materials & Design

119

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“…Additional investigations are being carried out to give a correct interpretation of the observed thermal event. Among other possible explanations, the correlation of peak B to the presence of Ni 2 Cr phase (for which the onset of disordering reaction is reported in Ni/Cr-containing alloys at the corresponding temperature range [32][33][34]) is being taken into account.…”

Section: Discussionmentioning

confidence: 99%

Investigation on precipitation phenomena of Ni–22Cr–12Co–9Mo alloy aged and crept at high temperature

Gariboldi

Cabibbo

Spigarelli

et al. 2008

International Journal of Pressure Vessels and Piping

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“…However, it is not clear whether the impacts of the first two effects in the Cantor-Wu alloys are also small. Specifically, the specific heat measurements of Cr-containing Cantor-Wu alloys 51 show a K-state transition at 800-1000 K, which is usually attributed to the orderdisorder transition [52][53][54] . Although the effects of SRO on r0 are clearly worthy investigating, accounting for them requires treatments of multisite scattering processes that go beyond the single-site approximation -e.g.…”

Section: Magnetism Beyond the Singlementioning

confidence: 99%

Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys

et al. 2019

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Whilst it has long been known that disorder profoundly affects transport properties, recent measurements on a series of solid solution 3d-transition metal alloys reveal two orders of magnitude variations in the residual resistivity. Using ab-initio methods, we demonstrate that, while the carrier density of all alloys is as high as in normal metals, the electron mean-free-path can vary from ~10 Å (strong scattering limit) to ~10 3 Å (weak scattering limit). Here, we delineate the underlying electron scattering mechanisms responsible for this disparate behavior. While site-diagonal, spin dependent, potential scattering is always dominant, for alloys containing only Fe, Co, and Ni the majority spin channel experiences negligible disorder scattering, thereby providing a short circuit, while for Cr/Mn containing alloys both spin channels experience strong disorder scattering due to an electron filling effect. Somewhat surprisingly, other scattering mechanisms -including displacement, or size effect, scattering which has been shown to strongly correlate with such diverse properties as yield strength -are found to be relatively weak in most cases 4 component equiatomic fcc solid solutions: NiPd, NiCo, NiFe, NiFeCo, NiCoCr, NiCoMn, NiCrCoMn, NiFeCoMn and NiFeCoCr. This set of alloys combined with NiFeCoCrMn and NiFeCoCrPd (here collectively referred to as Cantor-Wu alloys), constitute a rich playground for comprehensive studies of the role of maximal disorder on the properties of multi-component alloys by controlling both the number (increasing configurational entropy) and types (chemical specificity) of alloying elements 4,5,8 . Of interest here are the results of recent residual resistivity measurements 5,8 of a subset of Cantor-Wu alloys that show, rather than increasing monotonically with increasing numbers of components, values of r0 break into two subgroups of low (r0 <10 µW•cm) and high (r0 >75 µW•cm) resistivity alloys. In addition, two entropically identical alloys, NiCoFe (r0 = 1.7µW•cm) and NiCoCr (r0 =92.7 µW•cm), fall into different resistivity groupings. Remarkably, the least and most resistive alloys differ by almost two orders of magnitude, r0(NiCo)=1.3µW•cm; r0(NiFeCoCrPd)=124.8µW•cm. Interestingly, the low resistivity group have r0 values typical of dilute weak scattering alloys in which there are clearly defined host (solvent) and impurity (solute) elements. In such alloys, r0 arises from the scattering of a low Fermi energy DOS of nearly-freeelectron sp-states with large λ e [ε F ] and r0 generally obeys both Nordheim's relation (r0∝c((1-c);where c is impurity concentration) 9 and Linde's "law" (r0 ∝ (DZ) 2 ; where DZ is the valence difference between host and impurity atoms) 10 . (see Ref. 11 for a discussion) This, despite the fact that, in equiatomic alloys, the concept of host and impurity elements is lost and the Fermi energy falls in the high density of state (DOS) d-bands 5 . At the other extreme, high-r0 NiFeCoCrPd is

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Order–disorder reaction in Alloy 600

Cited by 37 publications

References 10 publications

Thermophysical properties of Ni-containing single-phase concentrated solid solution alloys

Thermophysical properties of Ni-containing single-phase concentrated solid solution alloys

Investigation on precipitation phenomena of Ni–22Cr–12Co–9Mo alloy aged and crept at high temperature

Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys

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