Quantifying primary recrystallization from EBSD maps of partially recrystallized states of an IF steel

Ayad, A.; Ramoul, M.; Rollett, Anthony D.; Wágner, F.

doi:10.1016/j.matchar.2020.110773

Cited by 56 publications

(7 citation statements)

References 41 publications

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“…The JMAK equation is easy to use. For a set of partially recrystallized samples annealed isothermally for different times, VV is determined either directly by microscopy [6][7][8][9] or indirectly by e.g. measurements of hardness [10] or electrical resistivity [11] and the data are fitted to equation (1) or (2).…”

Section: Introductionmentioning

confidence: 99%

Quantitative Comparison of the Recrystallization Kinetics of Two Industrially Processed 5xxx Aluminum Alloys

Lei

Sanders

Yang

et al. 2021

Metall Mater Trans A

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The annealing kinetics of cold-rolled AA5182 and AA5657 aluminum alloy sheets have been investigated and compared. The microstructures of a series of partially recrystallized samples are characterized by electron back scattered diffraction and key stereological parameters including volume fraction recrystallized, interfacial areas and contiguity are determined. The overall recrystallization kinetics as well as the nucleation and growth rates are thereby quantified. The results reveal that the nuclei develop in clusters. This matches well with the observation of a low kinetics exponent n =2 in AA5182. Much more surprising is that n is 2.8 in AA5657, even though the nucleation is clustered. Also, it is higher than almost all recrystallization kinetics investigations which generally find values significantly below 3.Effects of nucleation rate, spatial distribution of nuclei and growth rate are discussed and used in a quantitative analysis of recrystallization kinetics in the two alloys.

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Section: Introductionmentioning

confidence: 99%

Quantitative Comparison of the Recrystallization Kinetics of Two Industrially Processed 5xxx Aluminum Alloys

Lei

Sanders

Yang

et al. 2021

Metall Mater Trans A

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“…Nonetheless, the fraction recrystallized estimated from EBSD depends strongly on the chosen criterion to detect a recrystallized grain. Clearly a universal definition of the measurement of recrystallization fraction through EBSD measurement is a matter of debate [28,30] and is far beyond the scope of this paper.…”

Section: Resultsmentioning

confidence: 99%

“…It is proposed here to use the GOS approach with a threshold value of 2 • to separate the recrystallized grains from the unrecrystallized ones [27]. It is worth noting that quantifying accurately the fraction recrystallized using EBSD measurements is still a matter of debate [28].…”

Section: Methodsmentioning

confidence: 99%

An Attempt to Assess Recovery/Recrystallization Kinetics in Tungsten at High Temperature Using Statistical Nanoindentation Analysis

et al. 2020

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Measurement of recovery and recrystallization kinetics of tungsten at high temperature is a key issue for many applications, such as plasma facing units in the framework of thermonuclear fusion. These kinetics are mostly derived from Vickers hardness and EBSD measurements, which can lead to some inaccuracies due to the competition between recovery and recrystallization mechanisms. A complementary/alternative approach based on statistical grid nanoindentation is proposed in this paper. The basic idea is to assume that the fraction recrystallized can be deduced using the hardness probability density function measured on a fully recrystallized sample. The hardness probability density function of the set of non-recrystallized grains can then be analyzed. The methodology was applied to rolled tungsten samples annealed at high temperature. It was clearly observed that recovery and recrystallization overlapped in terms of softening fraction in the investigated time–temperature range. Activation energy of the static recovery mechanism is in the correct order of magnitude compared to bulk self-diffusion in tungsten. High-throughput nanoindentation analysis appears as a promising way to investigate recrystallization/recovery mechanisms in metals.

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“…[40] EBSD technique is also used to distinguish the DRX grains, according to the orientation difference between two adjacent grains can be increased due to the recrystallization, which can approach the large angular grain boundaries (>15°). [105,106] By counting the grain boundaries in selected representative regions based on the EBSD technique, [107] the number of recrystallization of the material can be qualitatively analyzed and the recrystallized grains can be distinguished. Transmission electron microscopy (TEM) imaging was carried out using a JEM-2100F microscope at 200 kV and an energy dispersive spectrometer (EDS) from Oxford Instruments.…”

Section: Methodsmentioning

confidence: 99%

Efficient Coarse‐Grained Superplasticity of a Gigapascal Lightweight Refractory Medium Entropy Alloy

Jia

et al. 2023

Advanced Science

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Superplastic metals that exhibit exceptional ductility (>300%) are appealing for use in high‐quality engineering components with complex shapes. However, the wide application of most superplastic alloys has been constrained due to their poor strength, the relatively long superplastic deformation period, and the complex and high‐cost grain refinement processes. Here these issues are addressed by the coarse‐grained superplasticity of high‐strength lightweight medium entropy alloy (Ti43.3V28Zr14Nb14Mo0.7, at.%) with a microstructure of ultrafine particles embedded in the body‐centered‐cubic matrix. The results demonstrate that the alloy reached a high coarse‐grained superplasticity greater than ≈440% at a high strain rate of 10−2 s−1 at 1173 K and with a gigapascal residual strength. A consecutively triggered deformation mechanism that sequences of dislocation slip, dynamic recrystallization, and grain boundary sliding in such alloy differs from conventional grain‐boundary sliding in fine‐grained materials. The present results open a pathway for highly efficient superplastic forming, broaden superplastic materials to the high‐strength field, and guide the development of new alloys.

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Quantifying primary recrystallization from EBSD maps of partially recrystallized states of an IF steel

Cited by 56 publications

References 41 publications

Quantitative Comparison of the Recrystallization Kinetics of Two Industrially Processed 5xxx Aluminum Alloys

Quantitative Comparison of the Recrystallization Kinetics of Two Industrially Processed 5xxx Aluminum Alloys

An Attempt to Assess Recovery/Recrystallization Kinetics in Tungsten at High Temperature Using Statistical Nanoindentation Analysis

Efficient Coarse‐Grained Superplasticity of a Gigapascal Lightweight Refractory Medium Entropy Alloy

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