Analysis of the Effect of Al on the Static Softening Kinetics of C-Mn Steels Using a Physically Based Model

Aretxabaleta, Z.; Pereda, Beatriz; López, Beatriz

doi:10.1007/s11661-013-2014-2

Cited by 11 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3(b) and (d)), respectively; the grain size is refined progressively but not to a sub-micron level. For example, Shen et al [45] found that the pure aluminum grains are significantly refined to 5 µm after single pass continuous extrusion processing. It is mainly owing to the continuous extrusion speed in present work is fast, the temperature of the extrusion die is as high as 773 K, and the Al-Mg alloy grain boundary migrates quickly at high temperature, which causes the grains to grow.…”

Section: Discussionmentioning

confidence: 99%

“…One is when the temperature is lower than 623 K (~573 K), the Al alloy enters the continuous extrusion plastic deformation zone, due to the severe shear deformation, a large number of dislocations are further generated in the grains, and the substructures are gradually formed. As the shear deformation progresses, these substructures form new grains, which are recrystallized grains and significantly refined (from 100 to 5 µm), after one pass Conform processing [45]; the other is higher than 623 K, the grains will grow up remarkably. Driven by high temperature (~773 K), the grains are refined and grow rapidly compared to the CC (from 154.3 to 72.7 µm).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Zhang

Zheng

et al. 2021

Int J Miner Metall Mater

View full text Add to dashboard Cite

Al-Mg alloys are an important class of non-heat treatable alloys in which Mg solute and grain size play essential role in their mechanical properties and plastic deformation behaviors. In this work, a cyclical continuous expanded extrusion and drawing (CCEED) process was proposed and implemented on an Al-3Mg alloy to introduce large plastic deformation. The results showed that the continuous expanded extrusion mainly improved the ductility, while the cold drawing enhanced the strength of the alloy. With the increased processing CCEED passes, the multi-pass cross shear deformation mechanism progressively improved the homogeneity of the hardness distributions and refined grain size. Continuous dynamic recrystallization played an important role in the grain refinement of the processed Al-3Mg alloy rods. Besides, the microstructural evolution was basically influenced by the special thermomechanical deformation conditions during the CCEED process.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Zhang

Zheng

et al. 2021

Int J Miner Metall Mater

View full text Add to dashboard Cite

show abstract

“…[2] In accordance with this, SRX of austenite has been the subject of a wealth of experimental studies. These have mainly focused on the effect of deformation parameters on SRX kinetics and final grain size, [3][4][5][6] the evolution of crystallographic texture, [7][8][9][10][11] and that of substructure. [7] In the same way as phase transformations, recrystallization has often been understood as a combination of nucleation and growth.…”

Section: Introductionmentioning

confidence: 99%

Nucleation Sites in the Static Recrystallization of a Hot-Deformed Ni-30 Pct Fe Austenite Model Alloy

Garcia-Chao

Eipe

Krugla

et al. 2023

Metall Mater Trans A

View full text Add to dashboard Cite

In the present study, the nucleation of static recrystallization (SRX) in austenite after hot deformation is experimentally analyzed using a Ni-30 pct Fe model alloy. In agreement with the predictions by current models, nucleation rate exhibits a strong peak, early during SRX. Whereas such an early peak is explained by current models by the saturation of nucleation sites, this condition is far from reached, even after the peak declines. In addition, triple-junction and grain-boundary sites are shown to make a quantitatively similar contribution to nucleation. However, for a given boundary between deformed grains, nucleation predominantly starts at one of the triple junctions. Triple-junction nucleation initiates by strain-induced boundary migration of the nucleus (bulging) along one of the boundaries at the junction. Annealing twin boundaries contribute negligibly to nucleation through their grain-boundary sites. By contrast, their junctions with the boundaries of the parent grains do play a relevant role. The earlier nucleation at the triple junctions is attributed to the higher dislocation density observed around them, and the energy of the boundary consumed by the bulge. Both the maximum and average number of nuclei formed per boundary between deformed grains increase with increasing boundary length.

show abstract

“…For instance, recrystallized grain sizes can be on the order of one to hundreds of microns (e.g., Refs. [17,18]). The phase-field simulations by Zhu et al were benchmarked with a low carbon steel with a final grain size of 5 µm [13], but we will show later that Avrami kinetics may not be reproduced for a larger grain size.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the size of the pristine grains can be several orders of magnitude smaller than the deformed grains, making it computationally expensive to simulate recrystallization from initial growth to full recrystallization. For instance, recrystallized grain sizes can be on the order of one to hundreds of microns (e.g., references [17,18]). The phase-field simulations by Zhu et al were benchmarked with a low carbon steel with a final grain size of 5 μm [13], but we will show later that Avrami kinetics may not be reproduced for a larger grain size.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of a phase field model for static recrystallization of deformed microstructures

Gentry

Thornton

2020

Modelling Simul. Mater. Sci. Eng.

View full text Add to dashboard Cite

Static recrystallization is a process whereby dislocation-free grains are nucleated in a deformed microstructure, and then newly recrystallized grains grow and consume the previously existing grains. This paper describes a phase field model for static recrystallization, along with details of the implementation and simulation results. Recrystallized grains are seeded utilizing a probabilitybased method, including a hold time to allow the order parameters to adjust to seeded grains. The nominal simulation time is corrected to account for the nuclei hold and for the time required for a nucleus to grow from its critical size to the seeded size. Microstructural evolution was simulated for two-and three-dimensional systems, and the fraction recrystallized was quantified via Avrami kinetics. The resulting Avrami time exponents were in agreement with the expected values for sitesaturated nucleation. The variability in the Avrami parameters was quantified by simulating the recrystallization of the same underlying polycrystalline microstructure but using different seed locations. Additional simulations were performed to determine the influence of the deformed microstructure on recrystallization, specifically investigating the effects of the spatial distribution of the initial dislocation density within the microstructure as well as the morphologies of the polycrystalline microstructure. For the significantly deformed polycrystalline microstructures examined in this work, it is shown that microstructural evolution is primarily driven by stored energy in dislocations rather than grain boundary energy.

show abstract

Analysis of the Effect of Al on the Static Softening Kinetics of C-Mn Steels Using a Physically Based Model

Cited by 11 publications

References 34 publications

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Microstructure, mechanical properties and deformation mechanisms of an Al-Mg alloy processed by the cyclical continuous expanded extrusion and drawing approach

Nucleation Sites in the Static Recrystallization of a Hot-Deformed Ni-30 Pct Fe Austenite Model Alloy

Sensitivity analysis of a phase field model for static recrystallization of deformed microstructures

Contact Info

Product

Resources

About