Mechanical Spectroscopy of Fe-Al-C Alloys Ordering

Pozdova, T. V.; Golovin, I.S.

doi:10.4028/www.scientific.net/ssp.89.279

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…The phase equilibrium and thermodynamic analysis of the phase diagram for the Fe-Al-C alloy ternary system have been studied without the MAX phase field [7][8][9]. In order to check the stability of the magnetic MAX phase, we have checked the phase diagram of the Fe-A-C (A = Al, Si, Ge) system.…”

Section: Phasementioning

confidence: 99%

Magnetic Fe_n+1AC_n(n= 1, 2, 3, and A = Al, Si, Ge) phases: fromab initiotheory

Luo

Ahuja

2008

J. Phys.: Condens. Matter

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We have investigated the structural stability and magnetism for a set of compounds Fe(n+1)AC(n) (n = 1, 2, 3, and A = Al, Si, Ge) using ab initio theory. From our calculation, we have shown that some Fe(n+1)AC(n) phases (n = 2) with the general MAX phase formula and a layered hexagonal structure that belongs to space group D(6h)(4)-P6(3)/mmc can have a combination of properties of the MAX phase at the same time as having magnetism. The Fe(3)AlC(2) phase shows the most stable ferromagnetic properties among these MAX phases and the magnetic moment is 0.73 μ(B)/Fe atom. In addition, the phase stability is predicted by comparing the total energy of the Fe(2)AlC and Fe(2)SiC phases with the total energy of the competing equilibrium phases at the corresponding composition.

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Section: Phasementioning

confidence: 99%

Magnetic Fe_n+1AC_n(n= 1, 2, 3, and A = Al, Si, Ge) phases: fromab initiotheory

Luo

Ahuja

2008

J. Phys.: Condens. Matter

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“…The relaxation strength is proportional to the amount of dissolved carbon in solid solution and inversely proportional to the peak temperature. In case of Fe-Al alloys it is better to operate not in terms of the peak height but in terms of the area under the peak [3]. Let us assume a simple exponential dependence between the carbon content in the solution and the ageing time (t), which is determined by heating rate:…”

Section: Diffusion In Materials -Dimat2004mentioning

confidence: 99%

“…Presence of Al in Fe significantly influences the Snoek peak with respect to that in α-Fe: the peak is shifted to higher temperatures and becomes broader. Ordering phenomena in Fe-Al, decrease the peak width [3].…”

Section: Introductionmentioning

confidence: 95%

Study of Fe<sub>3</sub>Al-Based Alloys by Internal Friction and <sup>59</sup>Fe Radiotracer Diffusion Measurements

Pavlova

Golovina

Divinski

et al. 2005

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Anelastic effects caused by carbon and vacancy diffusion in Fe3Al based alloys with and without strong carbide forming elements (Ti and Nb) are investigated by internal friction measurements. The decrease of the Snoek peak in Fe–26Al–2Ti and Fe–26Al–0.3Nb alloys with respect to the Fe–26Al alloy is related to a decrease in the amount of interstitially dissolved carbon (C). The so-called X peak, which is observed in the Fe–26Al alloy, also almost disappears after alloying. In order to elucidate the vacancy contribution to the origin of the X peak radiotracer measurements of 59Fe diffusion were performed. The results indicate that the change in the interstitially dissolved C concentration is the main reason of the observed changes in the X peak, although a certain influence of Ti and Nb alloying on the total vacancy concentration may be deduced from the diffusion study.

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“…It is known that carbon kinetics is much affected by substitutional Si and Al atoms due to solute-carbon interactions [5,6,7,8]. Multiple experimental studies attempted to investigate this solute effect by measuring the internal friction profiles in ferritic alloys [9,10,11,12,13,14,15,16,17]. This profile corresponds to the macroscopic signal of the carbon atomic jumps, which is sensitive to the change in activation enthalpies due to solute-carbon interactions [18,15].…”

Section: Introductionmentioning

confidence: 99%