The microstructural path of grain-boundary-nucleated phase transformations

Vandermeer, R.A.; Masumura, R.A.

doi:10.1016/0956-7151(92)90031-9

Cited by 44 publications

(33 citation statements)

References 9 publications

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“…[1] The evolution of microwas developed recently for time-dependent growth rate by structure during recrystallization can be described phenomeVandermeer and Masumura. [12] In his analysis, which was nologically as a nucleation and a growth process. The basis based on Eq.…”

Section: Introductionmentioning

confidence: 98%

Modeling the kinetics of grain-boundary-nucleated recrystallization processes after cold deformation

Chen

Zwaag

Todd³

2002

Metall Mater Trans A

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A physical model to predict the recrystallization kinetics of single-phase polycrystalline metals, based on a single grain representation of deformed microstructure (characterized by a mean subgrain size and mean misorientation of subgrain boundaries), is presented. The model takes into account the grain geometry, the position, and the density of the nucleation sites. The selected geometry is a regular tetrakaidecahedron, combining topological features of a random Voronoi-distribution characteristic for polycrystalline material with the advantages of a single grain calculation. The model employs empirically determined relationships from existing literature to describe the deformed microstructure and, in so doing, facilitates the prediction of the recrystallization behavior when only the deformation strain and the recrystallization temperature are known. The boundary mobility and the driving force, as well as the nucleation density, are related to the true plastic strain of deformation through the microstructure. The model also describes the effects of concurrent recovery on the overall recrystallization kinetics.

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Section: Introductionmentioning

confidence: 98%

Modeling the kinetics of grain-boundary-nucleated recrystallization processes after cold deformation

Chen

Zwaag

Todd³

2002

Metall Mater Trans A

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“…For instance, Vandermeer et al 13 assume that nuclei are randomly located in space. However, when one considers, for example, austenite to ferrite transformation, ferrite nucleates at grain boundaries 14,15 . Another example is recrystallization, where the deformed state is, as a rule, highly heterogeneous 16 casting some doubt on the assumption that nuclei are randomly located in space.…”

Section: Introductionmentioning

confidence: 99%

Cellular automata simulation of site-saturated and constant nucleation rate transformations in three dimensions

et al. 2006

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Microstructural evolution in three dimensions of nucleation and growth transformations is simulated by means of cellular automata. Two types of nucleation are considered: site-saturated nucleation and constant nucleation rate. The simulated microstrutural evolution agrees very well with exact analytical expressions. The simulated data also gives very good agreement with expressions derived to describe the evolution of the interfaces between transformed grains.

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“…But, V V , isn't enough for define nucleation mode. In this way, for studies of recrystallization, was developed microstructural path (MP) by Gokhale and DeHoff 16 , connect area per unit of volume, S V , with V V and after extended by Vandermeer and coauthors [17][18][19][20] . MP which may be written as…”

Section: Introductionmentioning

confidence: 99%

Sigma Phase in Superduplex Stainless Steel: Formation, Kinetics and Microstructural Path

et al. 2017

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The superduplex stainless steels (SDSS) are widely used in chemical, oil and gas industries, to pipelines and storage material facilities. In welding process or working in temperature elevated, secondary phases may appear in the form of precipitates, as the sigma phase (σ) which is an intermetallic compound. This compound is harmful to the properties of steel, deteriorating its mechanical properties, such as decreasing corrosion resistance and toughness. In this paper it is analyzed the formation, kinetics and microstructural evolution of sigma phase in SDSS UNS S32750 after isothermal aging at 700ºC, 750ºC and 800ºC. In this work sigma phase kinetics is studied by JMAK theory and by two microstructural path descriptors, S V , interfacial area per unit of volume between sigma phase and austenite, and <λ>, mean chord length of sigma, both in function of the V V , volumetric fraction of sigma, known in the literature as microstructural partial path (MP). The MP formulation is common in recrystallization studies, but so far has not been used in the sigma phase precipitation studies, being applied here for the first time. The results indicated that the sigma phase nucleates by site saturation with anisotropic linear impingement. This means that sigma phase nucleates on edges.

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The microstructural path of grain-boundary-nucleated phase transformations

Cited by 44 publications

References 9 publications

Modeling the kinetics of grain-boundary-nucleated recrystallization processes after cold deformation

Modeling the kinetics of grain-boundary-nucleated recrystallization processes after cold deformation

Cellular automata simulation of site-saturated and constant nucleation rate transformations in three dimensions

Sigma Phase in Superduplex Stainless Steel: Formation, Kinetics and Microstructural Path

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