On the grain growth exponent of pure iron

Vandermeer, R.A.; Hu, Hsun

doi:10.1016/0956-7151(94)90404-9

Cited by 63 publications

(27 citation statements)

References 25 publications

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“…There is a region where the two curves nearly overlap. This region appears to be about DϾ3D 0 , similar to that which was reported to be a "safe region" by Vandermeer et al 6) It was confirmed that this criterion was satisfied for various K and n values. Therefore, this region provides a criterion for the appropriate use of Beck's equation.…”

Section: Concept For Analyzing Isothermal Grain Growthsupporting

confidence: 72%

Prediction Model for the Austenite Grain Size in the Coarse Grained Heat Affected Zone of Fe-C-Mn Steels: Considering the Effect of Initial Grain Size on Isothermal Growth Behavior

et al. 2004

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The austenite grain size in the coarse-grained heat affected zone (CGHAZ) was predicted by analyzing isothermal grain growth behavior of Fe-C-Mn steels which were designed to investigate the effect of alloying elements. A procedure was proposed to prevent inappropriate neglect of initial grain size (D 0 ) and misreading both time exponent and activation energy for isothermal grain growth. It was found that the time exponent was almost constant, irrespectively of temperature and alloying elements, and activation energy increased with the addition of alloying elements. From quantification of the effect of alloying elements on the activation energy, an isothermal grain growth model was presented. Combining with the additivity rule, the austenite grain size in the CGHAZ was predicted.

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Section: Concept For Analyzing Isothermal Grain Growthsupporting

confidence: 72%

Prediction Model for the Austenite Grain Size in the Coarse Grained Heat Affected Zone of Fe-C-Mn Steels: Considering the Effect of Initial Grain Size on Isothermal Growth Behavior

et al. 2004

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“…Equation [6] was used directly to calculate ͗v͘ by method 2 for each experimental time studied. When the present data *The ⌬ f s data for these annealing times were not published in the Woldt and Juul Jensen article [14] but were supplied later courtesy of Woldt.…”

Section: Discussionmentioning

confidence: 99%

“…[1]. Furthermore, grain growth in pure materials [6] and in materials where pinning forces are accounted R for adequately also attests implicitly to the fundamental nature of the linear relationship. For recrystallization, on the other hand, the driving force for grain boundary migration, i.e., the stored energy of cold work, is much larger than the driving force in grain growth.…”

Section: Introductionmentioning

confidence: 93%

Grain boundary mobility during recrystallization of copper

Vandermeer

Jensen

Woldt

1997

Metall Mater Trans A

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Average grain boundary migration rates during recrystallization of cold-deformed copper were estimated from stereological measurements. In the same material, the instantaneous driving forces for boundary migration during recrystallization were calculated from calorimetric measurements of the release of the stored energy of cold work. The migration rate dependence on driving force was analyzed in the context of grain boundary migration rate theory, and within experimental error, a linear dependence was observed. The average mobility of grain boundaries migrating during recrystallization of cold-worked copper at 121 ЊC was calculated to be 6.31 ϫ 10 Ϫ10 (m 4 s Ϫ1 MJ Ϫ1 ). This result was found to be consistent with single boundary, curvature-driven grain boundary mobilities measured in copper at higher temperatures. It was also demonstrated that the average grain boundary mobility was reasonably within the expectation (order of magnitude uncertainty) of the Turnbull single process model of boundary migration with a process akin to grain boundary self-diffusivity as the rate-controlling atomic mechanism.

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“…Each pair of nearest neighbors contributes J to the system energy when they are of unlike result was obtained by neglecting the initial average grain size and the sample thickness. Vandermeer and Hu [23] later orientation and zero otherwise. The Kronecker's delta function in Eq.…”

Section: Introductionmentioning

confidence: 98%

“…Both where J is a positive constant which sets the scale of the grain-boundary energy, ␦ is the Kronecker's delta function, K and Q are obtained from experimental data [23] and are given in Table I. Hu [9] noted that the value of n in Eq.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional monte carlo simulation of grain growth in zone-refined iron

Sista

DebRoy

2001

Metall Mater Trans B

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The evolution of the grain structure and topological-class distributions in zone-refined iron were modeled using a three-dimensional (3-D) Monte Carlo (MC) model. The effect of grain size on topological features was examined. The relationship between the topological features of grains and the geometry of their surrounding grains was studied. In particular, the average number of sides of the grains was related to the average number of sides of their neighbors. Both the computed grainsize distribution and the topological-class distribution were found to be invariant with time. A linear relationship existed between the average grain size and the average number of sides of grains. The number of sides of grains was inversely proportional to the average number of sides of the neighboring grains. The computed average grain size, grain-size distribution, and topological-class distribution agreed well with the corresponding independent experimental data. The results indicate significant promise for understanding grain growth and topological features using 3-D MC simulation.

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On the grain growth exponent of pure iron

Cited by 63 publications

References 25 publications

Prediction Model for the Austenite Grain Size in the Coarse Grained Heat Affected Zone of Fe-C-Mn Steels: Considering the Effect of Initial Grain Size on Isothermal Growth Behavior

Prediction Model for the Austenite Grain Size in the Coarse Grained Heat Affected Zone of Fe-C-Mn Steels: Considering the Effect of Initial Grain Size on Isothermal Growth Behavior

Grain boundary mobility during recrystallization of copper

Three-dimensional monte carlo simulation of grain growth in zone-refined iron

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