Influence of carbon and nitrogen on solid solution decay and “475 °C Embrittlement” of High-Chromium Ferritic Steels

Golovin, I.S.; Sarrak, V. I.; Suvorova, S. O.

doi:10.1007/bf02658060

Cited by 31 publications

(6 citation statements)

References 4 publications

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“…Clear tendency of the S and X peaks joining is seen in Fe-26Al-5Cr alloys, and the only one peak instead of the S and X peaks is recorded in 15%Al-15%Cr alloy [88]. The X type peak was not observed in Fe-(from 16 to 35%)Cr or Fe-(15 and 27%)Cr-5%Al alloys [71]. These alloys are also not known to develop high vacancy concentrations.…”

Section: Proposed Mechanismsmentioning

confidence: 83%

“…Additional alloying of Fe-Al by Cr influences the Zener peak parameters. The activation energy for Zener relaxation in binary Fe- (15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)Cr alloys [71] is higher than that for Fe-(15-25)Al, namely roughly 3.3-3.5 and 2.4-2.8 eV, respectively [15]. As seen from our experiments, adding chromium to Fe-Al alloys (28Al-3Cr, 15Al-15Cr) increases the activation energy of Zener relaxation [88].…”

Section: Z Relaxationmentioning

confidence: 99%

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Anelasticity of Fe–Al alloys, revisited

et al. 2004

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Section: Proposed Mechanismsmentioning

confidence: 83%

Section: Z Relaxationmentioning

confidence: 99%

Anelasticity of Fe–Al alloys, revisited

et al. 2004

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“…Manganese is not mentioned to form pairs in ironbased alloys and, besides this, it has the nuclear spin I = 5 2 and hence would give six lines in each group. Chromium atoms form pairs in the iron-based solid solutions, which is recognized on the peak of Zener relaxation in the spectra of internal friction [20]; however, those are bound with the antiferromagnetic interaction and cannot contribute to the EPR spectrum in the ground state. The most probable candidate for the defect with axial symmetry, electron spin S = 5 2 and nuclear spin I = 3 2 is a single chromium atom having an interstitial nitrogen atom as a nearest neighbour and creating the Cr-N pair.…”

Section: Epr In Hydrogen-free Alloymentioning

confidence: 99%

Paramagnetic spin resonance in hydrogen-charged stainless austenitic steel

Shanina¹,

Gavriljuk²,

Kolesnik³

et al. 1999

J. Phys. D: Appl. Phys.

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Hydrogen-charged stainless austenitic steel Cr18Mn20 alloyed with 0.88 mass% of nitrogen is studied using a magnetic spin resonance method. The steel is paramagnetic before as well as after hydrogen charging, which allows one to observe electron spin resonance (ESR). It is shown that hydrogen causes a significant increase of the signal from conduction electrons in the ESR spectrum (CESR), i.e., it increases the concentration of free electrons in the alloy. Hydrogen charging results also in a stronger exchange interaction between free and localized electrons. The kinetics of desorption of hydrogen from the sample is studied and the value of the enthalpy of hydrogen migration in the crystal lattice is evaluated from the studies of the decay of the CESR signal.

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“…The spectrum of STS439Ti showed high damping behavior in the temperature range of 25 o C to 400 o C and the high damping was rapidly decreased after 400 o C. The shape of peak is totally different from debye peak. This high damping behavior might be regarded as magneto-mechanical damping behavior due to magnetic domain wall movement [5,6]. The alloy C and D shows coupling of Snoek relaxation of interstitial C and N in Fe-17%Cr and magneto-mechanical damping.…”

Section: Resultsmentioning

confidence: 95%

The IF Spectrum of Fe-C-N and Fe-17%Cr-C-N Alloys Measured by the Impulse Excitation Technique

Jung

Cooman

2012

SSP

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The temperature dependence of the dynamic Young’s modulus, E, and the damping, Q-1, of Fe-C-N and Fe-17%Cr-C-N alloys with different C, N contents were studied in the temperature range of 25°C to 600°C by the impulse excitation internal friction technique at 1KHz. Hot rolled samples were cold rolled to a thickness of 1.2mm and recrystallization annealed at 820°C for 30sec then gas jet cooled (-50°C/sec). Samples were subsequently tensile strained 6% and 16%. A Snoek peak was observed at 120°C in the undeformed sample and a Snoek-Koster peak was observed at 400°C after deformation. In the case of the Fe-Cr-C-N alloy, a high damping background due to magneto-mechanical damping was observed in the temperature range of 25°C to 400°C. A broaden Snoek peak in FeCr was observed at 300°C. The internal friction peaks observed in this study showed the strong dependence of the amount of interstitial contents and deformation and were well correlated to previous internal friction studies measured mainly by torsion pendulum and inverted torsion pendulum.

show abstract

Influence of carbon and nitrogen on solid solution decay and “475 °C Embrittlement” of High-Chromium Ferritic Steels

Cited by 31 publications

References 4 publications

Anelasticity of Fe–Al alloys, revisited

Anelasticity of Fe–Al alloys, revisited

Paramagnetic spin resonance in hydrogen-charged stainless austenitic steel

The IF Spectrum of Fe-C-N and Fe-17%Cr-C-N Alloys Measured by the Impulse Excitation Technique

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