In-situ EBSD study of deformation behavior of Al–Si–Cu alloys during tensile testing

Borkar, Hemant; Seifeddine, Salem; Jarfors, Anders E. W.

doi:10.1016/j.matdes.2015.06.100

Cited by 38 publications

(8 citation statements)

References 26 publications

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“…In Al-1% Mg alloy [13], such DBs were characteristic of several black and white bands in optical image. In AA1060 aluminum plate processed by snake rolling [25] and in Al-Si-Cu alloys after tensile testing [26], the similar DBs to those in this study, which were characteristic of many bands with different colors in EBSD orientation image, were also generated. Meanwhile, orientation differences between neighbouring DBs are accommodated in transition bands whose width is reduced to only one or two units but the large orientation change is retained [27].…”

Section: Mechanism Of Grain Refinement In Shear Spinningmentioning

confidence: 61%

“…In green bands, there are some black lines with an angle near 35° to rolling direction. The grain characteristics in this localised area are similar to features of deformation bands (DBs), which subdivide grains, particularly coarse-grains, into regions of different orientations during deformation, which are often observed on a macroscopic scale in aluminium and its alloys [13,[23][24][25][26]. In Al-1% Mg alloy [13], such DBs were characteristic of several black and white bands in optical image.…”

Section: Mechanism Of Grain Refinement In Shear Spinningmentioning

confidence: 75%

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Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

2016

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To investigate the grain refinement and its mechanism in shear spinning, microstructures of shear spun parts made by aluminium alloy under different deformation conditions, induced by different shear spinning deviation ratios, are studied. The results show that, after shear spinning, the microstructure is distributed symmetrically about a zone in sheet thickness defined as the neutral zone which is located between the inner surface and the middle plane of spun sheet thickness.Various deviation ratios in shear spinning can lead to grain refinement in different regions along thickness direction of the spun part. The microstructure characteristics indicate that the mechanism of grain refinement is due to the formation of deformation bands (DBs). It is observed that in DBs, parallel geometrically necessary boundaries (GNBs) formed by a zero deviation ratio and crossed GNBs formed by positive and negative deviation ratios are due to the different stress states induced by various deviation ratios in shear spinning. Due to the influence of grain refinement, micro hardness increases with the decreasing of the deviation ratio. The average value is increased by 16.04% under a negative deviation ratio compared to the initial micro hardness of the sheet. AbstractTo investigate the grain refinement and its mechanism in shear spinning, microstructures of shear spun parts made by aluminium alloy under different deformation conditions, induced by different shear spinning deviation ratios, are studied. The results show that, after shear spinning, the microstructure is distributed symmetrically about a zone in sheet thickness defined as the neutral zone which is located between the inner surface and the middle plane of spun sheet thickness. Various deviation ratios in shear spinning can lead to grain refinement in different regions along thickness direction of the spun part. The microstructure characteristics indicate that the mechanism of grain refinement is due to the formation of deformation bands (DBs). It is observed that in DBs, parallel geometrically necessary boundaries (GNBs) formed by a zero deviation ratio and crossed GNBs formed by positive and negative deviation ratios are due to the different stress states induced by various deviation ratios in shear spinning. Due to the influence of grain refinement, micro hardness increases with the decreasing of the deviation ratio. The average value is increased by 16.04% under a negative deviation ratio compared to the initial micro hardness of the sheet.

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Section: Mechanism Of Grain Refinement In Shear Spinningmentioning

confidence: 61%

Section: Mechanism Of Grain Refinement In Shear Spinningmentioning

confidence: 75%

Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

2016

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“…Recent developments in scanning electron microscopy (SEM) and EBSD system have overcome this difficulty, due to the in-situ tensile/EBSD technique has arrived. 14–16 The miniature tensile test stage with high precision has been developed and can be inserted into scanning electron microscopes (SEM) that equipped with a fast EBSD detector. Consequently, the observation area can be precisely locked down, and the valuable information (e.g.…”

Section: Introductionmentioning

confidence: 99%

In-situ EBSD study of the degradation behavior in a type 316 Austenitic Stainless Steel during plastic deformation

Wang

Zhang

et al. 2021

The Journal of Strain Analysis for Engineering Design

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Type 316 steels have been heavily utilized as the structural material in many construction equipment and infrastructures. This paper reports the characterization of degradation in 316 austenitic stainless steel during the plastic deformation. The in-situ EBSD results revealed that, with the increase of plastic strain, the band contrast (BC) value progressively decreased in both grain and grain boundaries, and the target surface becomes uneven after the plastic tensile, which indicates that the increase of surface roughness. Meanwhile, the KAM and ρGND values are low in the origin specimen but increased significantly after the in-situ tensile. The results indicated that the KAM and ρGND are closely related to the deformation degree of the materials, which can be used as the indicator for assessing the degradation of 316 steel. Besides, the re-orientation of grain occurred after the tensile deformation, which can be recognized from the lattice orientation and local orientation maps.

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“…In Scanning Electron Microscope (SEM), in situ mechanical testing is also used for studying the evolution of microstructures during exposure to stress. For instance, in situ Electron BackScatter Diffraction (EBSD) is performed in several studies to follow the deformation of materials, such as aluminum alloys during tensile tests [14,15].…”

Section: Introductionmentioning

confidence: 99%

In Situ Macroscopic Tensile Testing in SEM and Electron Channeling Contrast Imaging: Pencil Glide Evidenced in a Bulk β-Ti21S Polycrystal

et al. 2019

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In this paper, we report the successful combination of macroscopic uniaxial tensile testing of bulk specimen combined with In situ dislocation-scale observations of the evolution of deformation microstructures during loading at several stress states. The dislocation-scale observations were performed by Accurate Electron Channeling Contrast Imaging in order to follow the defects evolution and their interactions with grain boundaries for several regions of interest during macroscopic loading. With this novel in situ procedure, the slip systems governing the deformation in polycrystalline bulk β-Ti21S are tracked during the macroscopic uniaxial tensile test. For instance, curved slip lines that are associated with “pencil glide” phenomenon and tangled dislocation networks are evidenced.

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In-situ EBSD study of deformation behavior of Al–Si–Cu alloys during tensile testing

Cited by 38 publications

References 26 publications

Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

Mechanism of grain refinement of aluminium alloy in shear spinning under different deviation ratios

In-situ EBSD study of the degradation behavior in a type 316 Austenitic Stainless Steel during plastic deformation

In Situ Macroscopic Tensile Testing in SEM and Electron Channeling Contrast Imaging: Pencil Glide Evidenced in a Bulk β-Ti21S Polycrystal

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