A note on the diffusion of carbon atoms to dislocations

Krempaszky, Christian; Liedl, U.; Werner, Ewald

doi:10.1016/j.commatsci.2006.01.010

Cited by 24 publications

(12 citation statements)

References 14 publications

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“…A simulation study 20) suggested that the strong rotated cube accumulation in a severely cold rolled low carbon steel would be attributed to the cross-slip by the gliding of screw dislocations, which are likely to move more easily in the annealing process than edge dislocations because solute carbon interacts with edge dislocations rather than screw dislocations. 42,43) On the other hand, the ND// < 113 > orientation shows the largest kernel average misorientation in a 450°C annealed sample. It was confirmed that the {100} < 0 7 10 > oriented grains nucleate in the vicinity of the {311} < 011 > deformation matrix.…”

Section: Discussionmentioning

confidence: 95%

Strongly Developed Texture Components near Rotated Cube Orientation during Recrystallization in a Severely Cold Rolled Low Carbon Steel

2019

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Extraordinarily strong recrystallization texture components near rotated cube ({100} < 011 >) developed in a low carbon steel processed with a severe cold rolling at 99.8% reduction followed by an annealing at 550°C or more. The rotated cube orientation is beneficial for magnetic applications, while it has been recognized as an orientation difficult to recrystallize. Unlike the conventional 90% cold rolling sample, the 99.8% cold rolling sample showed an unusually strong α fiber deformation texture and a fine lamellar structure understood from previous work to be generated via grain subdivision. In addition, texture analysis of a partially recrystallized sample at lower temperature anneal of 450°C revealed that the {100} < 0 7 10 > oriented grains recrystallized discontinuously from near the domain boundaries in the 99.8% cold rolled sample, while the {100} < 011 > oriented grains were likely to recrystallize continuously. Kernel average misorientation analysis of EBSD data suggested that the {100} < 011 > oriented grains underwent a faster recovery than the other α fiber orientations, resulting in a fast nucleation and growing toward the deformed matrix. Since this oriented nucleation of {100} < 011 > oriented grains was not observed in 99.8% cold rolled pure iron and 99.2% cold rolled interstitial free steel, solute carbons in the steel would play a significant role for the selective and fast recovery of the {100} < 011 > oriented grains during the annealing process.

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Section: Discussionmentioning

confidence: 95%

Strongly Developed Texture Components near Rotated Cube Orientation during Recrystallization in a Severely Cold Rolled Low Carbon Steel

2019

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“…One can immediately see from equation (11) 3 for E = 0 that K = 1 and the site fraction y T is identical to that of the freely diffusing carbon, y L , or in other words, the traps offer 'no advantage' to interstitial atoms to stay in them. For E → ∞, K = 0.…”

Section: Trappingmentioning

confidence: 99%

“…[3] and the literature concerning pipe diffusion, [4][5][6][7][8]. With respect to C, the recent papers by Veiga et al [9,10] and Krempaszky et al [11] are important. Maalekian and Kozeschnik [12] developed a multicomponent model for the description of the thermodynamics of C segregation to dislocation cores in the framework of the CALPHAD approach.…”

Section: Introductionmentioning

confidence: 99%

Determination of depths of traps for interstitials from thermodynamic data: a new view on carbon trapping and diffusion

Svoboda¹,

Shan²,

Kozeschnik³

et al. 2013

Modelling Simul. Mater. Sci. Eng.

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Traps, such as dislocation cores, foreign atoms, surfaces of nano-precipitates, etc, can significantly influence the kinetics of diffusion of interstitial atoms in a crystal lattice. Trapping is reflected in the chemical diffusion coefficient, whose value can be up to several orders of magnitude lower than the corresponding diffusion coefficient in a trap-free system. If we consider trapping only at dilute foreign atoms, we may assume only one sort of traps in the system, the depth of which is characterized by E (trapping enthalpy) given by the decrease in energy due to trapping of one mole of interstitials. In this paper, a rigorous thermodynamically based concept is offered to extract the value of trapping enthalpy E from chemical potentials of interstitial atoms which are, for instance, available in the form of CALPHAD-type thermodynamic databases.Exemplarily, the values of E for C-trapping at Cr impurities are evaluated. For comparison, trapping enthalpies of C at various typical alloying elements in steel are also extracted and compared with literature values. The chemical diffusion coefficient of C in an Fe-Cr-C system at 500 • C is calculated for different mole fractions of C and Cr atoms. The influence of traps on diffusion becomes evident from this analysis.

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“…Control of the particle size, dispersion and amount of martensite in the ferritic matrix is also possible. Many studies [1][2][3][4][5][6][7] have shown that martensite content is dominant in controlling tensile properties and that increasing the amount of martensite decreases ductility. It has been suggested that optimum properties are obtained for dual phase steels containing 20% martensite.…”

Section: Introductionmentioning

confidence: 99%

Static strain ageing behaviour of dual phase steels

Gündüz

2008

Materials Science and Engineering: A

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A note on the diffusion of carbon atoms to dislocations

Cited by 24 publications

References 14 publications

Strongly Developed Texture Components near Rotated Cube Orientation during Recrystallization in a Severely Cold Rolled Low Carbon Steel

Strongly Developed Texture Components near Rotated Cube Orientation during Recrystallization in a Severely Cold Rolled Low Carbon Steel

Determination of depths of traps for interstitials from thermodynamic data: a new view on carbon trapping and diffusion

Static strain ageing behaviour of dual phase steels

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