Diffusion of chromium in Inconel-600

Pruthi, D.D.; Anand, M. S.; Agarwala, R.P.

doi:10.1016/0022-3115(77)90026-5

Cited by 83 publications

(23 citation statements)

References 11 publications

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“…In the present investigation, more precipitates have been observed at a tempering temperature of 1033 K in comparison with 1013 K. Hence grain boundary energy is less in the former case than the latter, which results in increased activation energy in the temperature regime of 1033e1053 K as compared to 1013e1033 K. Based on the values of activation energy in the temperature regime of 1013e1033 K and 1033e1053 K, it can be concluded that the rate controlling mechanism of the growth of the precipitate is the diffusion of interstitial solute carbon in the former case (97e133 kJ mol À1 ) [21] and it is the diffusion of substitutional solute chromium in the later case (~210e~272 kJ mol À1 ) [21]. Similar activation energy values have been reported by Pruthi et al [22] for volume diffusion of chromium (278 kJ/mol) in Inconel 600.…”

Section: Microstructuresupporting

confidence: 83%

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

Barbadikar

Deshmukh

Maddi

et al. 2015

International Journal of Pressure Vessels and Piping

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Section: Microstructuresupporting

confidence: 83%

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

Barbadikar

Deshmukh

Maddi

et al. 2015

International Journal of Pressure Vessels and Piping

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“…The reader may refer to the following papers for diffusion data. [9,[33][34][35] The comparison of these values with the apparent activation energies for PLC effect determined by various methods in this study is consistent with what has been published by different authors for this alloy.…”

Section: B Identification Of Solute Elements Involved In Dsasupporting

confidence: 89%

A Re-examination of the Portevin-Le Chatelier Effect in Alloy 718 in Connection with Oxidation-Assisted Intergranular Cracking

Max

Viguier

Andrieu

et al. 2014

Metall Mater Trans A

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International audienceIn Alloy 718, a sharp transition exists in the fracture path changing from an intergranular brittle mode to a transgranular ductile mode which is associated with a transition of flow behavior from smooth in the dynamic strain aging regime to a serrated one in the Portevin-Le Chatelier (PLC) regime. In order to better understand both deformation and rupture behavior, PLC phenomenon in a precipitation-hardened nickel-base superalloy was carefully investigated in a wide range of temperatures [573 K to 973 K (300°C to 700°C)] and strain rates (109^-5 to 3.2910^-2 s^-1 ). Distinction was made between two PLC domains characterized by different evolutions of the critical strain to the onset of the first serration namely normal and inverse behavior. The apparent activation energies associated with both domains were determined using different methods. Results showed that normal and inverse behavior domains are related to dynamic interaction of dislocations with, respectively, interstitial and substitutional solutes atoms. This analysis confirms that normal PLC regime may be associated to the diffusion of carbon atoms, whereas the substitutional species involves in the inverse regime is discussed with an emphasis on the role of Nb and Mo

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“…A decrease in temperature from 600 ЊC to 400 ЊC implies a decrease of at least of the reciprocal of temperature. This value is relatively close to the activation energy for matrix diffusion of chromium in five orders of magnitude in the rate of the controlling process, if there is no change in the mechanism with respect to that nickel-based alloys such as Alloy 600 (Ni-15 pct Cr-6 pct Fe), which is 277.7 kJ/mole, [21] and Alloy 800 (32 pct Niprevailing in the 600 ЊC to 700 ЊC range. This implies that heat treatments extended for more than 18 years will be 21 pct Cr-45 pct Fe), with a value of 287.4 kJ/mole.…”

Section: Introductionmentioning

confidence: 76%

“…This implies that heat treatments extended for more than 18 years will be 21 pct Cr-45 pct Fe), with a value of 287.4 kJ/mole. [22] Data for binary Ni-Cr alloys reported by Pruthi et al [21] also required at 400 ЊC to obtain the degree of sensitization observed in the high-temperature range. In order to study indicate that the activation energy increases with increasing chromium content, reaching about 290.4 kJ/mole for Nithe thermal stability of Alloy 825 at temperatures closer to those expected under repository conditions within a realistic 29.7 pct Cr.…”

Section: Introductionmentioning

confidence: 96%

Grain-boundary chemistry and intergranular corrosion in alloy 825

Pan,

Dunn,

Cragnolino

et al. 2000

Metall Mater Trans A

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Alloy 825, a former candidate material for radioactive high-level waste containers, was investigated to assess its thermal stability and the time-temperature conditions for sensitization. Alloy specimens with a carbon content of 0.01 wt pct in the mill-annealed (MA) and solution-annealed (SA) conditions were studied after thermal exposure to temperatures ranging from 600 ЊC to 800 ЊC for periods of up to 1000 hours. Sensitization was evaluated by using corrosion tests that were correlated to grainboundary chemistry analyses. Sensitized microstructures were found to contain M 23 C 6 -type carbides and a chromium-depleted region in the vicinity of the grain boundaries. Thermal aging at 700 ЊC for 100 hours resulted in the highest sensitization. While heat treatment at 640 ЊC showed a progressive development of sensitization with time, healing was found to occur after aging at 800 ЊC for 100 hours. The degree of sensitization, quantified by an equivalent chromium-depleted-zone size, correlates well with the corrosion rate in the nitric acid test. Thermodynamic models were used to calculate the interfacial chromium concentration, chromium depletion profile, and the depleted-zone width. Comparisons between experimental measurements and model calculations indicate that reliable prediction depends on the selection of key model parameters.

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Diffusion of chromium in Inconel-600

Cited by 83 publications

References 11 publications

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

Effect of normalizing and tempering temperatures on microstructure and mechanical properties of P92 steel

A Re-examination of the Portevin-Le Chatelier Effect in Alloy 718 in Connection with Oxidation-Assisted Intergranular Cracking

Grain-boundary chemistry and intergranular corrosion in alloy 825

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