In-situ EBSD observation and simulation of free surface roughening and ductile failure in the ultra-thin ferritic stainless steel sheet

Tran, Minh Tien; Hwang, Seok‐Ho; Jo, Ara; Lee, Ho Won; Kim, Dong Kyu

doi:10.1016/j.msea.2023.145489

Cited by 12 publications

(5 citation statements)

References 50 publications

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“…Therefore, a microscopic ductile fracture criterion in terms of the dissipated plastic energy at the grain scale was adopted and implemented in the aforementioned crystal plasticity framework to simulate the initiation of ductile fracture caused by the accumulation of strain localization. The criterion for microscopic plastic energy dissipation is related to the plastic energy dissipated over all the slip systems due to dislocation slips [23,35]:…”

Section: Crystal Plasticity Frameworkmentioning

confidence: 99%

“…More importantly, the microstructure-based mapped RVE was encased in a buffer region. By using this method, the FE model ensures more natural and realistic boundary conditions during the microme-chanical simulations [23]. The dimensions of the buffer regions were 1000 µm × 1000 µm × 600 µm.…”

Section: Microstructure-based Finite Element Modelmentioning

confidence: 99%

“…To simulate the uniaxial tensile tests, periodic boundary conditions (PBCs) were applied to the four planes (5-8-16-13, 5-6-14-13, 6-7-15-14, and 7-8-16-15) of the buffer region, while tie constraints were applied to the five planes (1-4-12-9, 3-4-12-11, 2-3-11-10, 1-2-10-9, and 9-10-11-12) of the alloys. A symmetry boundary condition was applied to the back plane, as indicated by the (13-14-15-16) plane of the buffer region, whereas both the front planes, as indicated by the (1-2-3-4) and (5-6-7-8) planes of the buffer and RVE regions, respectively, were free from out-of-plane normal and shear constraints [23].…”

Section: Microstructure-based Finite Element Modelmentioning

confidence: 99%

“…This approach quantitatively links the macroscopic deformation behavior of crystalline materials to the microscopic deformation mechanism by taking into account microstructural features such as grain morphology, crystallographic texture, and phase/grain boundaries [19,20]. Furthermore, microscopic fracture models related to various failure mechanisms (interface delamination, matrix fracture, and inclusion fracture), including cohesive models, plasticity energy dissipation, and accumulated plastic shear and fatigue initiation parameters, have been proposed and recently incorporated into crystal plasticity frameworks to predict the microscopic strain localization and damage the accumulation behavior governed by microstructural features in metallic materials [21][22][23][24][25][26]. Studies have demonstrated that the crystallographic texture and grain morphology are two key factors in AMed SS316L that influence its macroscopic anisotropy, deformation incompatibilities, stress, and slip transfer at grain boundaries [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure-Based Modeling of Deformation and Damage Behavior of Extruded and Additively Manufactured 316L Stainless Steels

Wang,

Lee,

Tran

et al. 2024

Materials

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In this study, we investigated the micromechanical deformation and damage behavior of commercially extruded and additively manufactured 316L stainless steels (AMed SS316L) by combining experimental examinations and crystal plasticity modeling. The AMed alloy was fabricated using the laser powder bed fusion (LPBF) technique with an orthogonal scanning strategy to control the directionality of the as-fabricated material. Optical microscopy and electron backscatter diffraction measurements revealed distinct grain morphologies and crystallographic textures in the two alloys. Uniaxial tensile test results suggested that the LPBFed alloy exhibited an increased yield strength, reduced elongation, and comparable ultimate tensile strength in comparison to those of the extruded alloy. A microstructure-based crystal plasticity model was developed to simulate the micromechanical deformation behavior of the alloys using representative volume elements based on realistic microstructures. A ductile fracture criterion based on the microscopically dissipated plastic energy on a slip system was adopted to predict the microscopic damage accumulation of the alloys during plastic deformation. The developed model could accurately predict the stress–strain behavior and evolution of the crystallographic textures in both the alloys. We reveal that the increased yield strength in the LPBFed alloy, compared to that in the extruded alloy, is attributed to the higher as-manufactured dislocation density and the cellular subgrain structure, resulting in a reduced elongation. The presence of annealing twins and favorable texture in the extruded alloy contributed to its excellent elongation, along with a higher hardening rate owing to twin–dislocation interactions during plastic deformation. Moreover, the grain morphology and defect state (e.g., dislocations and twins) in the initial state can significantly affect strain localization and damage accumulation in alloys.

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Section: Crystal Plasticity Frameworkmentioning

confidence: 99%

Section: Microstructure-based Finite Element Modelmentioning

confidence: 99%

Section: Microstructure-based Finite Element Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Microstructure-Based Modeling of Deformation and Damage Behavior of Extruded and Additively Manufactured 316L Stainless Steels

Wang,

Lee,

Tran

et al. 2024

Materials

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“…Texture, for example, is a common property used to select materials and conditions of processing for different applications, such as automotive components. Furthermore, inappropriate texture may contribute to the propagation of defects, such as ridging and cracking in ferritic stainless steels [5,6].…”

Section: Introductionmentioning

confidence: 99%

Study of the stampability of AISI 441 steel under different initial conditions

Neto,

Silva,

Matějka

et al. 2024

Preprint

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The deep drawing process in metallic materials has several limitations, such as a stamped depth, the occurrence of wrinkles, the fracture of the sheet before total deformation and the generations of solids with variations in wall thickness. Considering these variables, this work studies the formability of AISI 441 stainless steel under different initial conditions, namely, as-received and rolled to investigate the effect of these variables on the formability of this ferritic stainless steel. The mechanical characterization of AISI 441 steel involved tensile, shearing and Vickers microhardness tests followed by cold stamping, using a deep stamping die. The structural investigation was accomplished by optical microscopy and electron backscatter diffraction techniques. The mechanical behaviour after the stamping process was analyzed by shearing tests on the bottom and wall of the cup and correlated to the deformation limit of the material, and the respective texture characteristics. The shearing test results indicated the effect of the initial condition on the mechanical behaviour after the stamping of AISI 441 steel, which exhibited hardening of the wall and softening at the bottom of the cups. Change in misorientation grain and strengthening of γ-fiber texture component for the rolled condition of AISI 441 steel.

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Crystal Plasticity-Based Assessment of Constitutive Laws for Microstructure and Rolling Texture Capture in Ferritic Stainless Steel During Cold Rolling

Song,

Luo,

Zhang

et al. 2024

JOM

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In-situ EBSD observation and simulation of free surface roughening and ductile failure in the ultra-thin ferritic stainless steel sheet

Cited by 12 publications

References 50 publications

Microstructure-Based Modeling of Deformation and Damage Behavior of Extruded and Additively Manufactured 316L Stainless Steels

Microstructure-Based Modeling of Deformation and Damage Behavior of Extruded and Additively Manufactured 316L Stainless Steels

Study of the stampability of AISI 441 steel under different initial conditions

Crystal Plasticity-Based Assessment of Constitutive Laws for Microstructure and Rolling Texture Capture in Ferritic Stainless Steel During Cold Rolling

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