Modeling recystallization kinetics in a deformed iron single crystal

Vandermeer, R.A.; Rath, B. B.

doi:10.1007/bf02653918

Cited by 98 publications

(80 citation statements)

References 6 publications

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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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Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…6) These are often based on Johnson-Mehl-AvramiKolmogorov (JMAK) transformation kinetics, [7][8][9][10][11] microstructural path methodology [12][13][14] or computer simulation.…”

Section: Introductionmentioning

confidence: 99%

Recrystallization Kinetics of Low and Ultra Low Carbon Steels during High-rate Annealing.

Ferry

Muljono²,

Dunne

2001

ISIJ International

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Annealing experiments were carried out to study the effect of rapid heating rates on the recrystallization kinetics and grain size of steels with a range of carbon levels (0.003-0.05 % C). The steels were cold-rolled to 70 % reduction and subsequently annealed at heating rates from 50 to 1 000°C/s to peak temperatures (T p ) in the range 600 to 800°C and held at T p for various times and cooled to ambient temperature at a rates up to 2 000°C/s. For the steels investigated, the rate of anisothermal recrystallization and the final grain size decreases with increasing heating rate. These results do not support previous work in which it was concluded that ultra-rapid softening (which was associated with an observed decrease in recrystallization temperature at high heating rate and a concomitant increase in grain size) occurs at heating rates in excess of 500°C/s. An annealing model, based on JMAK transformation kinetics, is presented, which predicts the kinetics of recrystallization for any combination of input parameters: heating rate, peak temperature, holding time and cooling rate. The model is shown to predict the strong effect of holding time and cooling rate on the rate of recrystallization at high heating rates.

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“…A parameter describing nucleation behavior is given by δ, the value which is determined as δ = 3m − 2n [44]. A value of δ = 1 corresponds to constant nucleation rate and δ ≤ 0 corresponds to site saturation.…”

Section: Microstructural Path Modeling (Mpm)mentioning

confidence: 99%

Reduction of Annealing Times for Energy Conservation in Aluminum

Rollett¹,

Weiland²,

Alvi³

et al. 2005

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and the Pennsylvania Technology Investment Authority (PTIA) to make processing of aluminum less costly and more energy efficient. Researchers in the Department of Materials Science and Engineering have investigated how annealing processes in the early stages of aluminum processing affect the structure and properties of the material. Annealing at high temperatures consumes significant amounts of time and energy. By making detailed measurements of the crystallography and morphology of internal structural changes they have generated new information that will provide a scientific basis for shortening processing times and consuming less energy during annealing. Background:The status of the Domestic Technology for the thermomechanical processing of aluminum alloy intended for sheet and plate product is as follows. Hot rolling processes are aimed at breaking down as-cast structures in Direct-Chill (DC) ingots. Critical to the success of this stage of the processing is the refinement of the as-cast microstructure in terms of both grain morphology and the crystallographic orientations present; we will refer to the latter as texture. 2 particularly important to the application of such materials as 5xxx for can closures and 3xxx for beverage can stock. In particular, it is standard practice to anneal partially broken-down slabs for long times in order to ensure that recrystallization is completed before continuing the hot rolling process. Simple models exist that describe the rate at which the recrystallization process takes place but no information is available on the texture development. This proposal project will remedy that lack by measuring texture-dependent recrystallization rates (kinetics). Status:The project is complete. Three different commercial purity aluminum alloys (AA1050, AA5005 and AA3003) were studied. The main applications of these (non-heat treatable) alloys are beverage cans, automotive products etc. Recrystallization and texture evolution are two very important transformations in the thermo-mechanical processing of these alloys. These transformations are of critical importance for aluminum industry as they are directly related to energy consumption and properties of the finished products. The main aim of this project is to further increase our current understanding of recrystallization and texture evolution using advanced analytical tools like Electron Backscatter Diffraction (EBSD). The project was divided into two main parts -experimental data collection and extraction of critical parameters from experimental data forming one part and simulation of recrystallization from the experimental data and comparison of experimental results with simulation being the other part. The experimental data collection and analysis involved annealing of asreceived samples and scanning them in an EBSD system. The main approach followed in the experimental analysis was that of identification of the most important parameters required for quantification of recrystallization and texture evolution. This analysis required de...

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Modeling recystallization kinetics in a deformed iron single crystal

Cited by 98 publications

References 6 publications

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

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

Recrystallization Kinetics of Low and Ultra Low Carbon Steels during High-rate Annealing.

Reduction of Annealing Times for Energy Conservation in Aluminum

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