Influence of MnS particles on the behaviors of grain boundary migration in Fe-3%Si alloys

Mao, Weimin; An, Zhiguo; Li, Shuxia

doi:10.1007/s11434-009-0607-3

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…A GOES Fe‐3%Si‐0.022%S‐0.1%Mn (wt.) sheet containing a large amount of MnS particles 15, 16 was prepared in the usual way 16–18. The sheet before HTSRA showed a crystallographic texture with {111} 〈110〉 and {111} 〈112〉 components as well as weak {100} 〈001〉 and {110} 〈001〉 components, in which the {111}, {100} and {110} planes of grains were parallel to the sheet surface.…”

Section: Experiments and Resultsmentioning

confidence: 99%

“…It has been shown 15 that the boundary of a grain with higher particle density will move towards the area with lower particle density more easily, because the boundary migration will experience less pinning effect induced by the particles inside the grains. The Goss grains without absolute size advantages but with higher particle density can grow in the sheet surface in two steps.…”

Section: Discussionmentioning

confidence: 99%

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Growth Process of Goss Grains during Secondary Recrystallization of Grain‐oriented Electrical Steels

Guo

2010

steel research int.

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The coarsening behaviour of Goss grains in grain oriented electrical steel during annealing after cold rolling was investigated. The results show that the coarsening resistance of fine second phase particles was reduced inside the surface grains. This induced particle coarsening and the reduction of particle density. The reduction of particle density was grain orientation dependent because of the elastic anisotropy of ferrite. Experimental results also revealed that some small surface Goss grains exhibited higher particle density than their neighbouring grains. This may account for the higher coarsening resistance of fine particles and be responsible for the stronger pinning effect on the migration of grain boundaries. Therefore, these Goss grains may have grown at the expense of smaller neighbouring grains and most were very unlikely to be consumed by large neighbouring grains during secondary recrystallization annealing. When their sizes became even larger, they consumed the large grains in turn and consequently formed a strong Goss texture.

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Section: Experiments and Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Growth Process of Goss Grains during Secondary Recrystallization of Grain‐oriented Electrical Steels

Guo

2010

steel research int.

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“…Static coarsening is a thermally activated process that has been widely studied in the domain of carbon-steel alloys [25]. Usually it takes place by the jumping of atoms from one grain to another and the migration of grain boundaries.…”

Section: Static Grain Coarsening Modelsmentioning

confidence: 99%

Static coarsening of titanium alloys in single field by cellular automaton model considering solute drag and anisotropic mobility of grain boundaries

Yang

et al. 2012

Chin. Sci. Bull.

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Static coarsening is an important physical phenomenon that influences microstructural evolution and mechanical properties. How to simulate this process effectively has become an important topic which needs to be dealt with. In this paper, a new cellular automaton (CA) model, which considers the effect of solute drag and anisotropic mobility of grain boundaries, was developed to simulate static grain coarsening of titanium alloys in the beta-phase field. To describe the effect of the drag caused by different solute atoms on coarsening, their diffusion velocities in beta titanium were estimated relative to that of titanium atoms (Ti). A formula was proposed to quantitatively describe the relationship of the diffusion velocity of Ti to that of solute atoms; factors influencing the diffusion velocity such as solute atom radius, mass, and lattice type were considered. The anisotropic mobility of grain boundaries was represented by the parameter c 0 , which was set to 1 for a fully anisotropic effect. These equations were then implemented into the CA scheme to model the static coarsening of titanium alloys Ti-6Al-4V, Ti17 (Ti-5Al-4Mo-4Cr-2Sn-2Zr, wt%), TG6 (Ti-5.8Al-4.0Sn-4.0Zr-0.7Nb-1.5Ta-0.4Si-0.06C, wt%) and TA15 (Ti-6Al-2Zr-1Mo-1V, wt%) in the beta field. The predicted results, including coarsening kinetics and microstructural evolution, were in good agreement with experimental results. Finally, the effects of time, temperature, and chemical composition on grain coarsening and the limitations of the model were discussed. The mechanical properties of titanium alloys such as the creep resistance, fracture toughness and crack propagation resistance are determined by their grain sizes in the beta phase field [1,2]. However, the grains are prone to static coarsening when held in the beta phase field because of the structural characteristics of beta-titanium and relatively high stacking fault energy at high temperatures [3]; this results in a marked decrease in the mechanical properties of final products. Therefore, it is necessary to understand and to control static coarsening of titanium alloys in a single phase field to obtain the expected mechanical properties. Previously, many experimental investigations have focused on the static coarsening behaviors of titanium alloys in the beta phase field. Ivasishin et al. [4,5] investigated the effect of texture evolution on the values of the static coarsening exponent n and activation energy for Ti-6Al-4V alloy in the beta field. They found values of n ranging from 0.22 to 0.31 at different temperatures, but there were marked deviations attributed to different materials and experiments when the results were compared with those of others. Recently, Semiatin et al. [6][7][8] investigated the static grain coarsening of Ti-6Al-4V alloy via a series of heat treatments at typical temperatures. They found that the coarsening process of primary alpha particles was controlled by the volume diffusion of solute elements at lower temperatures and the growth exponent was equal to 0.33.

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“…Common chemical composition, i.e. C:0.25~0.30%, Si: 3.0~3.1%, Mn:0.05~0.12%, S:0.015~0.028%, P:0.003~0.006%, Al:0.003-0.007%, N:0.003-0.006% [7,8] of conversional oriented electrical steels was used. The hot band was obtained from industry in which the ingot was hot rolled down to about 2 mm.…”

Section: Experimental Materialsmentioning

confidence: 99%

Abnormal Growth Mechanisms of Goss Grains in Grain-Oriented Electrical Steels

Mao

Yang

et al. 2011

MSF

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The possible mechanisms concerning abnormal growth of Goss grains in grain oriented electrical steels were investigated. The density of inhibitor particles near sheet surface, where the Goss grains located, was lower than that in center layer before secondary recrystallization, and the grains near surface could grow more easily because of reduced pinning effect. Few Goss grains could survive the growth competition and reach the sheet surface, after which the inhibitor particles inside the Goss grains coarsened slower. The phenomenon resulted in easy growth of the Goss grains at the expense of smaller neighboring grains while they could hardly be consumed by larger neighboring grains during the high temperature secondary recrystallization. Very large final size of the Goss grains was then obtained. The mechanisms were discussed based on the hot rolling characteristics and the elastic anisotropy of the ferrite matrix.

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Influence of MnS particles on the behaviors of grain boundary migration in Fe-3%Si alloys

Cited by 11 publications

References 7 publications

Growth Process of Goss Grains during Secondary Recrystallization of Grain‐oriented Electrical Steels

Growth Process of Goss Grains during Secondary Recrystallization of Grain‐oriented Electrical Steels

Static coarsening of titanium alloys in single field by cellular automaton model considering solute drag and anisotropic mobility of grain boundaries

Abnormal Growth Mechanisms of Goss Grains in Grain-Oriented Electrical Steels

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