Phase-decomposition-related short-range ordering in an Fe–Cr alloy

Dubiel, S.; Żukrowski, J.

doi:10.1016/j.actamat.2013.07.003

Cited by 32 publications

(50 citation statements)

References 33 publications

(36 reference statements)

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“…Very good fits (in terms of  2 ) were obtained and the best-fit values of the spectral parameters are presented in Table 1. Noteworthy, these values are in a very good agreement with the corresponding ones obtained previously for Fe-Cr alloys [14][15][16][17][18][19].…”

Section: Samples Spectra Measurement and Analysissupporting

confidence: 90%

“…As in the case of the NIR-data, also in this case the SRO-parameters are characteristic of the neighbour shell. Those determined for 1NN are positive showing first a light decrease and then an increase with the dose;  2 = 0 for D=810 16 ions/cm 2 and it strongly decreases with D.…”

Section: Irradiated (Ir) Sidementioning

confidence: 85%

“…It is worth noting that contrary to other microscopic methods like ATP and TEM, MS gives information on the whole sample with a resolution of a unit cell. More details can be found elsewhere [14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Change of Cr atoms distribution in Fe85Cr15 alloy caused by 250keV He+ ion irradiation to different doses

Dubiel

Żukrowski

2015

Journal of Alloys and Compounds

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Redistribution of Cr atoms in a Fe 85 Cr 15 alloy caused by its irradiation with 250 keV He + ions to different doses, D=810 16 , 1610 16 and 4810 16 ions/cm 2 was investigated by means of conversion electrons Mӧssbauer spectroscopy. The redistribution was expressed in terms of the Warren-Cowley short-range order parameters  1 ,  2 and  12 pertaining to the first (1NN), second (2NN) and both i.e. 1NN+2NN shells, respectively. Clear evidence was found, both for non-irradiated and irradiated samples that the actual distribution of Cr atoms is characteristic of the shell, and for a given shell it depends on the irradiation dose. In particular,  1 is positive, hence indicates an under population of Cr atoms in 1NN with respect to the random case,  2 is negative, giving evidence thereby that 2NN is overpopulated by Cr atoms, and  12 is weakly positive. Under the applied irradiation the number of Cr atoms in both neighbor shells decreased signifying thereby a clustering of Cr atoms. The underlying decrease of Cr concentration within the 1NN-2NN volume around the probe Fe atoms was estimated at 1.5 at% ranging between 2.1 for the lowest and 0.8 at% for the highest dose.

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Section: Samples Spectra Measurement and Analysissupporting

confidence: 90%

Section: Irradiated (Ir) Sidementioning

confidence: 85%

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Change of Cr atoms distribution in Fe85Cr15 alloy caused by 250keV He+ ion irradiation to different doses

Dubiel

Żukrowski

2015

Journal of Alloys and Compounds

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“…However, ample research has been done on both the experimental and theoretical aspects of disorders like short-range ordering and clustering (SRO and SRC) as well as Guinier-Preston zones (GP zones) in high-concentration solid-solution alloys since the 1960s [18][19][20][21], mainly based on X-ray and neutron diffuse scattering experiments. As expected, the SRO (SRC) has been found to largely influence the mechanical properties and the long-term structural stability of many engineering materials like the light-weight high-strength Al alloys [22], bcc Fe-Cr [23] and fcc austenitic steels [24][25][26] and nickel based alloys [27,28] etc.…”

Section: Introductionmentioning

confidence: 62%

Structural-disorder and its effect on mechanical properties in single-phase TaNbHfZr high-entropy alloy

2016

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“…The understanding of the initial structure and its effect on the subsequent aging is, however, hampered by the difficulty in studying the initial concentration fluctuations. So far, only a limited number of techniques, such as Mö ssbauer spectroscopy [32,33], diffuse neutron scattering [22,23] and atom probe tomography in this work and in Zhou et al [24,25], have been applied successfully for the investigation of the initial structure. Theoretically, there are a few viable methods to simulate the subsequent phase decomposition.…”

Section: Implications Of Findings On Structural Modeling and Embrittlmentioning

confidence: 99%

Effect of solution treatment on spinodal decomposition during aging of an Fe-46.5 at.% Cr alloy

et al. 2016

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Spinodal decomposition is a key phase transition in advanced materials and a significant effort is paid to the quantitative modeling of the phenomenon. The initial materials condition is often assumed to be random during modeling, but this may be an oversimplification. In this work, the effect of solution treatment above the miscibility gap, on spinodal decomposition during subsequent aging, has been investigated for an Fe-46.5 at.% Cr alloy. By atom probe tomography (APT), it is found that different extents of quenched-in Cr clustering exist after solution treatments at different temperatures. The clustering is pronounced at 800°C but decreases significantly with increasing temperature to 900°C. Thermodynamic Monte Carlo simulations show that there is a difference in atomic short range order between the different solution treatment temperatures. By APT, it is, furthermore, found that the kinetics of spinodal decomposition at 500°C, i.e., within the miscibility gap, is enhanced in the initial alloy condition, where Cr was less randomly distributed. These observations are supported by kinetic Monte Carlo simulations, predicting a similar but less pronounced qualitative effect on spinodal decomposition kinetics. Other possible reasons for the enhanced kinetics could be related to clustering of interstitial elements and/ or sigma phase, but neither was found in the experiments. Nonetheless, the observations in this work suggest that it is necessary to implement a modeling strategy, where the initial structure is properly accounted for when simulating spinodal decomposition.

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Phase-decomposition-related short-range ordering in an Fe–Cr alloy

Cited by 32 publications

References 33 publications

Change of Cr atoms distribution in Fe85Cr15 alloy caused by 250keV He+ ion irradiation to different doses

Change of Cr atoms distribution in Fe85Cr15 alloy caused by 250keV He+ ion irradiation to different doses

Structural-disorder and its effect on mechanical properties in single-phase TaNbHfZr high-entropy alloy

Effect of solution treatment on spinodal decomposition during aging of an Fe-46.5 at.% Cr alloy

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