Bulk and grain boundary diffusion of59Fe,51Cr, and63Ni in austenitic stainless steel under influence of silicon content

Assassa, W.; Guiraldenq, P.

doi:10.1179/msc.1978.12.3.123

Cited by 53 publications

(8 citation statements)

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“…From the Arrhenius plot of ln D versus the inverse of kT (Figure 7), activation energy of 2.1 eV is obtained for the silicon diffusion in D9 steel. The activation energy for silicon diffusion in the present experiment may be compared to the self-diffusion energy of iron (2.84 eV) in fcc-Fe [17], and it is also comparable with the diffusion of alloying elements like nickel (2.72 eV), iron (2.60 eV), and chromium (2.51 eV) reported in austenitic stainless steel [5]. In addition, the activation energy deduced here for silicon diffusion is much greater than the experimentally determined effective vacancy migration energy (1.13 eV) in solution-annealed D9 steel [18].…”

Section: Resultssupporting

confidence: 82%

“…Addition of fast diffusing solutes can increase the vacancy migration and in turn the diffusion of solvent atoms. Evidences exist in the literature with respect to the increase in the diffusivity of major alloying elements like Fe, Cr, and Ni due to silicon additions [5,19]. It should be noted that another fast diffusing species, namely titanium is present in D9 steel.…”

Section: Resultsmentioning

confidence: 99%

“…Though some amount of studies on the effect of minor alloying elements on the self-diffusion of the constituent elements have been carried out [5], reports on the diffusion behavior of silicon in SS 316 are sparse, and to the best of our knowledge, there is hardly any literature describing the diffusion behavior of silicon in titanium-modified steels.…”

Section: Introductionmentioning

confidence: 99%

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Application of Resonant Nuclear Reactions for Studying the Diffusion of Nitrogen and Silicon in Ti-Modified Stainless Steel

Arunkumar

David

Nair

et al. 2012

Advances in Materials Science and Engineering

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Resonant nuclear reaction analysis can be used for the study of diffusion behaviour of minor alloying elements in reactor structural materials. In the present paper,15N(p,αγ)12Cand30Si(p,γ)31Preactions have been used to profile the ion-implanted15Nand30Siin D9 alloy (titanium-modified austenitic stainless steel). The diffusion coefficients at various temperatures have been estimated from the broadening of the implantation profiles during thermal annealing, and the activation energies are deduced.

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Section: Resultssupporting

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Application of Resonant Nuclear Reactions for Studying the Diffusion of Nitrogen and Silicon in Ti-Modified Stainless Steel

Arunkumar

David

Nair

et al. 2012

Advances in Materials Science and Engineering

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“…A silica layer also could suppress internal carburization by blocking the inward diffusion of carbon [78]. An alternative explanation is that Si affects the Cr diffusion rate in the alloy [79]. Also, since HR3C does not contain any Al or Ti, it benefits from not forming internal oxides, which partly explains the low mass gain.…”

Section: The Effect Of Mn and Si Additionsmentioning

confidence: 99%

A Tracer Study on sCO2 Corrosion with Multiple Oxygen-Bearing Impurities

et al. 2021

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Several modern power production systems utilize supercritical CO2 (sCO2), which can contain O2 and H2O as impurities. These impurities may degrade the compatibility of structural alloys through accelerated oxidation. However, it remains unclear which of these impurities plays a bigger role in high-temperature reactions taking place in sCO2. In this study, various model and commercial Fe‐ and Ni‐based alloys were exposed in 300 bar sCO2 at 750 °C to low levels (50 ppm) of O2 and H2O for 1,000 h. 18O-enriched water was used to enable the identification of the oxygen source in the post-exposure characterization of the samples. However, oxygen from the water did not accumulate in the scale, which consisted of Cr2O3 in the cases where a protective oxide formed. A 2wt.% Ti addition to a Ni-22%Cr model alloy resulted in the formation of thicker oxides in sCO2, while a 1wt.% Al addition reduced the scale thickness. A synergistic effect of both Al and Ti additions resulted in an even thicker oxide than what was formed solely by Ti, similar to observations for Ni-based alloy 282.

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“…[1] for ␦/L, ␥/L, and ␦/␥ equilibria have been given in Section III. The solute diffusion data of ferrite and austenite [17][18][19][20][21][22][23] needed to solve Eqs. [2] and [4] have been shown in Table I.…”

Section: Ids Modelmentioning

confidence: 99%

Calculation of solidification-related thermophysical properties for steels

Miettinen¹

1997

Metall Mater Trans B

190

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Special algorithms have been developed to calculate important solidification-related thermophysical properties: enthalpy and enthalpy-related data (i.e., specific and latent heat), density, and thermal conductivity for low-alloyed and stainless steels. The algorithms are heavily based on the use of earlier developed phase transformation models, an interdendritic solidification model (IDS), and an austenite decomposition model (ADC), which solve, as a function of temperature, the phase fractions and compositions needed in these calculations. As a result, the thermophysical properties can be calculated at any temperature, from 1600 ЊC to 25 ЊC, taking into account the discontinuities caused by special phase transformations (i.e., ferritic, austenitic and peritectic solidification, ferrite/austenite transformation, and austenite decomposition to various structures) influenced by the steel grade and the cooling conditions.

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Bulk and grain boundary diffusion of⁵⁹Fe,⁵¹Cr, and⁶³Ni in austenitic stainless steel under influence of silicon content

Cited by 53 publications

References 1 publication

Application of Resonant Nuclear Reactions for Studying the Diffusion of Nitrogen and Silicon in Ti-Modified Stainless Steel

Application of Resonant Nuclear Reactions for Studying the Diffusion of Nitrogen and Silicon in Ti-Modified Stainless Steel

A Tracer Study on sCO2 Corrosion with Multiple Oxygen-Bearing Impurities

Calculation of solidification-related thermophysical properties for steels

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