Assessment of the Strengthening Mechanisms Operating in Microalloyed Steels During Cyclic Deformation Using High-Resolution Electron Backscatter Diffraction

Lisiecka-Graca, Paulina; Muszka, Krzysztof; Majta, Janusz

doi:10.1007/978-3-030-05861-6_51

Cited by 2 publications

(3 citation statements)

References 12 publications

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“…The major advantage of the studied model alloy is the fact that austenite phase is stable at room temperature. In the investigated material, a micro-alloying addition of Nb was added to cause a precipitation strengthening mechanism, which plays a significant role in the formation of the dislocation substructure [12][13][14][15]. The initial microstructure of the investigated material is presented in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

2020

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This study presents an effective technique for taking advantage of the full-field measurement method of Digital Image Correlation (DIC) for the assessment of the strain distribution during the metal forming process when the strain path change was performed. The applied methodology is based on the combination of a numerical simulation for the stress calculation and full-field surface strain measurement in a forward/reverse three-point bending test. In the numerical part, the Chaboche model and dislocation density-based model were selected and verified in terms of the prediction of a softening/hardening effect occurring during strain reversal. The Chaboche model parameters identification procedure, on the basis of a cyclic torsion test, combined with inverse analysis, was also described. The results of the study showed the advantages and disadvantages of both of the analyzed work hardening models. The obtained results were analyzed in the light of the deformation inhomogeneity and reorganization of the dislocation structure during the cyclic deformation test.

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Section: Methodsmentioning

confidence: 99%

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

2020

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“…The initial dislocation density used in the performed calculation has been taken from the microstructural analysis (figure 6). The particular methodology and microstructure analysis have been presented as well in (Lisiecka- Graca et al, 2019).…”

Section: Modellingmentioning

confidence: 99%

“…6. The distribution maps of geometrically necessary dislocation density (GND) for the low carbon steel (a) and microalloyed steel (b)(Lisiecka-Graca et al, 2019).…”

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confidence: 99%

Controlling deformation inhomogeneity in the Accumulative Angular Drawing Process assisted by constitutive and multiscale numerical modelling

Graca¹,

Kwiecień²,

Madej³

et al. 2019

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Ultrafine-grained structure was produced in the Accumulative Angular Drawing (AAD) process in which the complex strain path was applied. The microalloyed steel wire rods were produced using multi-pass wire drawing process where the high strain accumulation is used as a way to achieve much higher microstructure refinement level compared to the conventional wire drawing (WD) process. The wires after both AAD process and WD process were examined in order to assess mechanical properties and microstructure development. In order to evaluate the effects of complex deformation on microstructure development and mechanical properties of the drawn wires, a numerical model of the torsion tests was applied using Abaqus software. The cyclic torsion tests were performed to study the effects of the applied hardening rule -described as a function of dislocations density and the accuracy of the prediction of material behaviour subjected to strain path change during AAD. It has been shown that an additional advantage of presented approach is its capability of tracking evolution of dislocation density during the deformation process. The initial dislocation densities used in the performed calculations were taken from the microstructural analysis using high resolution EBSD. During strain reversal, annihilation of the dislocations (Bauschinger effect) is a common phenomenon that leads to the decrease in dislocation density and affects the final strength. Finally, based on the proposed constitutive description, multiscale finite element modelling combined with Digital Material Representation (DMR) was used as a tool for prediction of the deformation and microstructure inhomogeneity in the drawn wires.

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Assessment of the Strengthening Mechanisms Operating in Microalloyed Steels During Cyclic Deformation Using High-Resolution Electron Backscatter Diffraction

Cited by 2 publications

References 12 publications

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

Full-Field Strain Measurement and Numerical Analysis of a Microalloyed Steel Subjected to Deformation with Strain Path Change

Controlling deformation inhomogeneity in the Accumulative Angular Drawing Process assisted by constitutive and multiscale numerical modelling

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