Deformation analysis of ferrite/pearlite banded structure under uniaxial tension using digital image correlation

Zhang, Xiaochuan; Wang, Yong; Yang, Jia; Qiao, Zhixia; Ren, Chunhua; Chen, Cheng

doi:10.1016/j.optlaseng.2016.04.019

Cited by 39 publications

(11 citation statements)

References 25 publications

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“…The simulation results also indicate that the tensile properties including tensile strength and ductility are weaker in the banded microstructure with the banding direction perpendicular to the tensile axis, as mentioned in previous studies. [7,10] Local micromechanical deformation behavior resulted from the RVE simulations has been investigated for the non-banded and banded microstructures with the banding direction parallel to the tensile axis during uniaxial tension. Figures 5(a 1 ) and (b 1 ) show the evolution of equivalent strain in the non-banded microstructure at two deformation steps (e eq ¼ 0:04; 0:08).…”

Section: A Uniaxial Tensile Testsmentioning

confidence: 99%

“…[4,5,8,9] Ferritic-pearlitic banded structures of steels display anisotropic mechanical properties due to the direction of ferrite-pearlite banding. [10] The influences of ferritepearlite banding, precisely its direction on the mechanical behavior of these materials, have been explored in several research works. The micro-deformation behavior of the ferritic-pearlitic banded structure of steel under uniaxial tension in longitudinal and transverse directions is analyzed using digital image correlation techniques by Zhang et al.10] Their results indicate that tensile properties are relatively weaker in the transverse direction than in the longitudinal direction.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Microstructural Morphology on Formability, Strain Localization, and Damage of Ferrite-Pearlite Steels: Experimental and Micromechanical Approaches

Isavand

Assempour

2021

Metall Mater Trans A

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This paper attempts to predict how the microstructural features and mechanical properties of the individual constituents affect the deformation behavior and formability of ferrite-pearlite steels under quasi-static loading at room temperature. For this purpose, finite element simulations using representative volume elements (RVEs) based on the real microstructures were implemented to model the flow behavior of the ferrite-pearlite steels with various microstructural morphologies (non-banded and banded). The homogenized flow curves obtained from the RVEs subjected to periodic boundary conditions together with displacement boundary conditions were validated with the experimental results of the uniaxial tensile tests. Then, the initial microstructural inhomogeneity and Johnson-Cook damage criteria were employed for both non-banded and banded RVEs to estimate the onset of plastic instability under different loading paths ranging from uniaxial tension to equi-biaxial tension. Finally, the forming limit diagrams of both ferritic-pearlitic microstructures were predicted, which show a good agreement with the experimental results of the Nakazima stretch-forming tests (less than 13 pct error). It implies that the initial microstructural inhomogeneity criterion adequately enables to predict the plastic instability in the ferritic-pearlitic steel sheets without using any damage or failure criterion. The most commonly observed damage mechanism is the severe plastic deformation of the ferrite grains near the pearlite colonies due to the strength contrast between ferrite and pearlite. Another significant finding is that the microstructural morphology has a crucial influence on the strain partitioning, strain localization, and formability of the ferritic-pearlitic steels.

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Section: A Uniaxial Tensile Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of Microstructural Morphology on Formability, Strain Localization, and Damage of Ferrite-Pearlite Steels: Experimental and Micromechanical Approaches

Isavand

Assempour

2021

Metall Mater Trans A

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“…A grey scale change detection method was proposed to monitor damage to materials, which can reflect the grey value change of each pixel point in the region of interest of the image by defining the normalized parameter C between the displacement and the grey value. [26,27] Inspired by this, this research endeavours to demonstrate the grey-scale changes that occur in frozen cells is presented by Equation (1) and Equation (2).…”

Section: Image Processingmentioning

confidence: 99%

Ice crystal growth of living onion epidermal cells as affected by freezing rates

Wang

et al. 2018

International Journal of Food Properties

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The entire crystallization process and the effect of freezing rates on the temperature of spontaneous freezing (TSF) of living onion epidermal cells were analysed in this study. The cells, stained with iodine at a concentration of 1%, were frozen at three different freezing rates, i.e. 2, 1.2, and 0.5°C/min, and were thawed at 5°C/min. The higher freezing rate caused a higher TSF. Moreover, this article presents a method for determining whether a cell is inactivated by a plasmolysis experiment. The results of plasmolysis showed that the formation of ice crystals did not cause fatal mechanical damages to the cells, even when the freezing rate was as slow as 0.1°C/min. Finally, this article also demonstrated the grey-scale changes that occurred in the cells, as evidenced by an image processing technique. This further highlighted the ice crystal growth process and showed the ice crystal content at different locations inside the cells.

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“…Although they have been studied for many years at home and abroad, there are still some unsolved problems [1]. The banded structure occurs frequently, such as the alternating parallel bands of ferrite and pearlite [2]. The relationship between the banded structure morphology and the mechanical properties of steel plate has become research hotspots in recent years [3].…”

Section: Introductionmentioning

confidence: 99%

Genetic relationship of microstructure and mechanical properties between ferrite/pearlite steel plate and billet

Feng

Li²,

Li³

et al. 2022

Mater. Res. Express

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This paper proposed the double-pass compression thermal/force simulation experiment to in-situ analyze the phase transformation of continuous casting billet during the controlled rolling and controlled cooling process. The genetic relationship between the central segregation of the billet and solute element distribution of the steel plate, and also the genetic relationship of microstructure and mechanical properties between them were experimentally studied. The results show that the microstructure and mechanical properties between the billet and corresponding batch of steel plate have the genetic relationship, and the link of the relationship is central segregation. The phase transformation of supercooling austenite will be affected by the central segregation of Mn and C elements, and the granular bainite abnormal segregation band is the transformation product of Mn and C element segregation region.

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Deformation analysis of ferrite/pearlite banded structure under uniaxial tension using digital image correlation

Cited by 39 publications

References 25 publications

Effects of Microstructural Morphology on Formability, Strain Localization, and Damage of Ferrite-Pearlite Steels: Experimental and Micromechanical Approaches

Effects of Microstructural Morphology on Formability, Strain Localization, and Damage of Ferrite-Pearlite Steels: Experimental and Micromechanical Approaches

Ice crystal growth of living onion epidermal cells as affected by freezing rates

Genetic relationship of microstructure and mechanical properties between ferrite/pearlite steel plate and billet

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